Top Ptc Site Paying in Bitcoin

Here are the BEST Pay-to-Click networks for earning Bitcoins simply by clicking ads, viewing websites and videos. Next to faucets, Bitcoin PTC sites are the fastest way to start getting Bitcoins for little effort.
The best part is, you can refer new users through each site and earn commissions of referral clicks. After awhile, these earnings really start to add up with more and more Bitcoins.


             1.  Btcclicks 


             2.  Bitsforclicks

             3.  ads4btc

             4.  clix4btc

             5.  refbit

Top Bitcoin Mining Site

might be your best bet as of this writing. I've used their services and they could provide you a decent amount of bitcoins BUT it is entirely dependent on the amount of hashpower you invest in to. As of this day, I could say that you can break-even in a year's time and profit from their onwards. They are offering a lifetime bitcoin mining contract with your one-time spend. As long as their venture remains profitable, then they're good. This may change in the future.
100% assured income.
*No frauds. No Ponzi Schemes.* Everything is done online. Earn Pure white money even while sleeping


1.  Genisis mining  My referral code: 5y4F3L (-3% off your order) 

2.  mininghub

3.  Hashflare.io

4.  BitcoinTask


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Free Bitcoin

Do you wonder where you can get some free bitcoins? For many of us, the discovery of Bitcoin is like the discovery of organic foods. We can see the benefits of using them but find it difficult to justify the cost, and then there is the risk that we’ll be getting a bad deal since we don’t know what we’re doing.

In Bitcoin, it’s like every organic food store has someone out front, offering free samples. Also, there’s a library everywhere you look, but only a few of those libraries have any good information. The largest traders would benefit a great deal if everyone just jumped blindly into Bitcoin, investing large chunks of their life savings in the process. That would be just fine by them, but it’s unlikely to happen. More likely, people are going to get involved with Bitcoin either by necessity, by chance or because someone was willing to give them a few bitcoins to get started with.
Now, before we begin discussing the places out there to get free Bitcoin, let’s just be clear: there is no way to get wealthy without working or investing for it. It is impossible to make an income in bitcoins or any other currency just by clicking around on some websites. However, that being said, cryptocurrencies are unique in that clever marketers can make a profit doing exactly that, giving away money. This would not be possible in other currencies, where they simply can’t be broken down small enough. The operator will usually make less than a penny. If they were forced to give you a penny or more, there’d be no way to be profitable. Getting free bitcoins is not a way to get rich, and certainly not the most profitable use of one’s time, but if you’ve got some free time and would like to pick up a small amount of extra Bitcoin now and then, then this definitive guide will is a great place to start.

Why Use a Blockchain?

As the implications of the invention of have become understood, a certain hype has sprung up around blockchain technology.
This is, perhaps, because it is so easy to imagine high-level use cases. But, the technology has also been closely examined: millions of dollars have been spent researching blockchain technology over the past few years, and numerous tests for whether or not blockchain technology is appropriate in various scenarios have been conducted.
Blockchain technology offers new tools for authentication and authorization in the digital world that preclude the need for many centralized administrators. As a result, it enables the creation of new digital relationships.
By formalizing and securing new digital relationships, the blockchain revolution is posed to create the backbone of a layer of the internet for transactions and interactions of value (often called the 'Internet of Value', as opposed to the 'Internet of Information' which uses the client-server, accounts and master copy databases we’ve been using for over the past 20 years.)
But, with all the talk of building the digital backbone of a new transactional layer to the internet, sometimes blockchains, private cryptographic keys and cryptocurrencies are simply not the right way to go.
Many groups have created flowcharts to help a person or entity decide between a blockchain or master copy, client-server database. The following factors are a distillation of much of what has been previously done:

Is the data dynamic with an auditable history?

Paper can be hard to counterfeit because of the complexity of physical seals or appearances. Like etching something in stone, paper documents have certain permanence.
But, if the data is in constant flux, if it is transactions occurring regularly and frequently, then paper as a medium may not be able to keep up the system of record. Manual data entry also has human limitations.
So, if the data and its history are important to the digital relationships they are helping to establish, then blockchains offer a flexible capacity by enabling many parties to write new entries into a system of record that is also held by many custodians.

Should or can the data be controlled by a central authority?

There remain many reasons why a third party should be in charge of some authentications and authorizations. There are times when third-party control is totally appropriate and desirable. If privacy of the data is the most important consideration, there are ways to secure data by not even connecting it to a network.
But if existing IT infrastructure featuring accounts and log-ins is not sufficient for the security of digital identity, then the problem might be solved by blockchain technology.
As Satoshi Nakamoto wrote in his (or her) seminal work, "Bitcoin: A Peer-to-Peer Electronic Cash System": “Merchants must be wary of their customers, hassling them for more information than they would otherwise need. A certain percentage of fraud is accepted as unavoidable.”
Private key cryptography enables push transactions, which don't require centralized systems and the elaborate accounts used to establish digital relationships. If this database requires millions of dollars to secure lightweight financial transactions, then there’s a chance blockchains are the solution.

Is the speed of the transaction the most important consideration?

Does this database require high-performance millisecond transactions? (There is more on this point in our guide: "What is the Difference Between a Blockchain and a Database?").
If high performance, millisecond transactions are what is required, then it’s best to stick with a traditional-model centralized system. Blockchains as databases are slow and there is a cost to storing the data – the processing (or 'mining') of every block in a chain. Centralized data systems based on the client-server model are faster and less expensive… for now.

In short, while we still don’t know the full limits and possibilities of blockchains, we can at least say the use cases which have passed inspection have all been about managing and securing digital relationships as part of a system of record.

How Bitcoin Mining Works?

In traditional fiat money systems, governments simply print more money when they need to. But in bitcoin, money isn’t printed at all – it is discovered. Computers around the world ‘mine’ for coins by competing with each other.
How does mining take place?
People are sending bitcoins to each other over the bitcoin network all the time, but unless someone keeps a record of all these transactions, no-one would be able to keep track of who had paid what. The bitcoin network deals with this by collecting all of the transactions made during a set period into a list, called a block. It’s the miners’ job to confirm those transactions, and write them into a general ledger.

Making a hash of it
This general ledger is a long list of blocks, known as the 'blockchain'. It can be used to explore any transaction made between any bitcoin addresses, at any point on the network. Whenever a new block of transactions is created, it is added to the blockchain, creating an increasingly lengthy list of all the transactions that ever took place on the bitcoin network. A constantly updated copy of the block is given to everyone who participates, so that they know what is going on.
But a general ledger has to be trusted, and all of this is held digitally. How can we be sure that the blockchain stays intact, and is never tampered with? This is where the miners come in.
When a block of transactions is created, miners put it through a process. They take the information in the block, and apply a mathematical formula to it, turning it into something else. That something else is a far shorter, seemingly random sequence of letters and numbers known as a hash. This hash is stored along with the block, at the end of the blockchain at that point in time.
Hashes have some interesting properties. It’s easy to produce a hash from a collection of data like a bitcoin block, but it’s practically impossible to work out what the data was just by looking at the hash. And while it is very easy to produce a hash from a large amount of data, each hash is unique. If you change just one character in a bitcoin block, its hash will change completely.
Miners don’t just use the transactions in a block to generate a hash. Some other pieces of data are used too. One of these pieces of data is the hash of the last block stored in the blockchain.
Because each block’s hash is produced using the hash of the block before it, it becomes a digital version of a wax seal. It confirms that this block – and every block after it – is legitimate, because if you tampered with it, everyone would know.
If you tried to fake a transaction by changing a block that had already been stored in the blockchain, that block’s hash would change. If someone checked the block’s authenticity by running the hashing function on it, they’d find that the hash was different from the one already stored along with that block in the blockchain. The block would be instantly spotted as a fake.
Because each block’s hash is used to help produce the hash of the next block in the chain, tampering with a block would also make the subsequent block’s hash wrong too. That would continue all the way down the chain, throwing everything out of whack.

Competing for coins
So, that’s how miners ‘seal off’ a block. They all compete with each other to do this, using software written specifically to mine blocks. Every time someone successfully creates a hash, they get a reward of 25 bitcoins, the blockchain is updated, and everyone on the network hears about it. That’s the incentive to keep mining, and keep the transactions working.
The problem is that it’s very easy to produce a hash from a collection of data. Computers are really good at this. The bitcoin network has to make it more difficult, otherwise everyone would be hashing hundreds of transaction blocks each second, and all of the bitcoins would be mined in minutes. The bitcoin protocol deliberately makes it more difficult, by introducing something called ‘proof of work’.
The bitcoin protocol won’t just accept any old hash. It demands that a block’s hash has to look a certain way; it must have a certain number of zeroes at the start. There’s no way of telling what a hash is going to look like before you produce it, and as soon as you include a new piece of data in the mix, the hash will be totally different.

Miners aren’t supposed to meddle with the transaction data in a block, but they must change the data they’re using to create a different hash. They do this using another, random piece of data called a ‘nonce’. This is used with the transaction data to create a hash. If the hash doesn’t fit the required format, the nonce is changed, and the whole thing is hashed again. It can take many attempts to find a nonce that works, and all the miners in the network are trying to do it at the same time. That’s how miners earn their bitcoins.

How do Bitcoin Transactions Work?

Bitcoin transactions are sent from and to electronic bitcoin wallets, and are digitally signed for security. Everyone on the network knows about a transaction, and the history of a transaction can be traced back to the point where the bitcoins were produced.
Holding onto bitcoins is great if you’re a speculator waiting for the price to go up, but the whole point of this currency is to spend it, right? So, when spending bitcoins, 
how do transactions work?

There are no bitcoins, only records of bitcoin transactions

Here’s the funny thing about bitcoins: they don’t exist anywhere, even on a hard drive. We talk about someone having bitcoins, but when you look at a particular bitcoin address, there are no digital bitcoins held in it, in the same way that you might hold pounds or dollars in a bank account. You cannot point to a physical object, or even a digital file, and say “this is a bitcoin”.
Instead, there are only records of transactions between different addresses, with balances that increase and decrease. Every transaction that ever took place is stored in a vast public ledger called the block chain. If you want to work out the balance of any bitcoin address, the information isn’t held at that address; you must reconstruct it by looking at the blockchain.

What does a transaction look like?

If Alice sends some bitcoins to Bob, that transaction will have three pieces of information:
·         An input. This is a record of which bitcoin address was used to send the bitcoins to Alice in the first place (she received them from her friend, Eve).
·         An amount. This is the amount of bitcoins that Alice is sending to Bob.
·         An output. This is Bob's bitcoin address.

How is it sent?
To send bitcoins, you need two things: a bitcoin address and a private key. A bitcoin address is generated randomly, and is simply a sequence of letters and numbers. The private key is another sequence of letters and numbers, but unlike your bitcoin address, this is kept secret.
Think of your bitcoin address as a safe deposit box with a glass front. Everyone knows what is in it, but only the private key can unlock it to take things out or put things in.
When Alice wants to send bitcoins to Bob, she uses her private key to sign a message with the input (the source transaction(s) of the coins), amount, and output (Bob’s address).
She then sends them from her bitcoin wallet out to the wider bitcoin network. From there, bitcoin miners verify the transaction, putting it into a transaction block and eventually solving it.

Why must I sometimes wait for my transaction to clear?

Because your transaction must be verified by miners, you are sometimes forced to wait until they have finished mining. The bitcoin protocol is set so that each block takes roughly 10 minutes to mine.
Some merchants may make you wait until this block has been confirmed, meaning that you may have to make a cup of coffee and come back again in a short while before you can download the digital goods or take advantage of the paid service.
On the other hand, some merchants won’t make you wait until the transaction has been confirmed. They effectively take a chance on you, assuming that you won’t try and spend the same bitcoins somewhere else before the transaction confirms. This often happens for low value transactions, where the risk of fraud isn’t as great.

What if the input and output amounts don’t match?

Because bitcoins exist only as records of transactions, you can end up with many different transactions tied to a particular bitcoin address. Perhaps Jane sent Alice two bitcoins, Philip sent her three bitcoins and Eve sent her a single bitcoin, all as separate transactions at separate times.
These are not automatically combined in Alice’s wallet to make one file containing six bitcoins. They simply sit there as different transaction records.
When Alice wants to send bitcoins to Bob, her wallet will try to use transaction records with different amounts that add up to the number of bitcoins that she wants to send Bob.
The chances are that when Alice wants to send bitcoins to Bob, she won’t have exactly the right number of bitcoins from other transactions. Perhaps she only wants to send 1.5 BTC to Bob.
None of the transactions that she has in her bitcoin address are for that amount, and none of them add up to that amount when combined. Alice can’t just split a transaction into smaller amounts. You can only spend the whole output of a transaction, rather than breaking it up into smaller amounts.
Instead, she will have to send one of the incoming transactions, and then the rest of the bitcoins will be returned to her as change.
Alice sends the two bitcoins that she got from Jane to Bob. Jane is the input, and Bob is the output. But the amount is only 1.5 BTC, because that is all she wants to send. So, her wallet automatically creates two outputs for her transaction: 1.5 BTC to Bob, and 0.5 BTC to a new address, which it created for Alice to hold her change from Bob.

Are there any transaction fees?

Sometimes, but not all the time.
Transaction fees are calculated using various factors. Some wallets let you set transaction fees manually. Any portion of a transaction that isn’t picked up by the recipient or returned as change is considered a fee. This then goes to the miner lucky enough to solve the transaction block as an extra reward.
Right now, many miners process transactions for no fees. As the block reward for bitcoins decreases, this will be less likely.
One of the frustrating things about transaction fees in the past was that the calculation of those fees was complex and arcane. It has been the result of several updates to the protocol, and has developed organically.
Updates to the core software handling bitcoin transactions will see it change the way that it handles transaction fees, instead estimating the lowest fee that will be accepted.

Can I get a receipt?

Bitcoin wasn’t really meant for receipts. Although there are changes coming in version 0.9 that will alter the way payments work, making them far more user-friendly and mature.
Payment processors like BitPay also provide the advanced features that you wouldn’t normally get with a native bitcoin transaction, such as receipts and order confirmation web pages.

What if I only want to send part of a bitcoin?


Bitcoin transactions are divisible. A satoshi is one hundred millionth of a bitcoin, and it is possible to send a transaction as small as 5430 satoshis on the bitcoin network.

What is Blockchain Technology?

"The practical consequence […is…] for the first time, a way for one Internet user to transfer a unique piece of digital property to another Internet user, such that the transfer is guaranteed to be safe and secure, everyone knows that the transfer has taken place, and nobody can challenge the legitimacy of the transfer. The consequences of this breakthrough are hard to overstate."
- Marc Andreessen
From a cruising altitude, a blockchain might not look that different from things you're familiar with, say Wikipedia.
With a blockchain, many people can write entries into a record of information, and a community of users can control how the record of information is amended and updated. Likewise, Wikipedia entries are not the product of a single publisher. No one person controls the information.
Descending to ground level, however, the differences that make blockchain technology unique become more clear. While both run on distributed networks (the internet), Wikipedia is built into the World Wide Web (WWW) using a client-server network model.
A user (client) with permissions associated with its account is able to change Wikipedia entries stored on a centralized server.

Whenever a user accesses the Wikipedia page, they will get the updated version of the 'master copy' of the Wikipedia entry. Control of the database remains with Wikipedia administrators allowing for access and permissions to be maintained by a central authority.

Wikipedia's digital backbone is similar to the highly protected and centralized databases that governments or banks or insurance companies keep today. Control of centralized databases rests with their owners, including the management of updates, access and protecting against cyber-threats.

The distributed database created by blockchain technology has a fundamentally different digital backbone. This is also the most distinct and important feature of blockchain technology.

Wikipedia's 'master copy' is edited on a server and all users see the new version. In the case of a blockchain, every node in the network is coming to the same conclusion, each updating the record independently, with the most popular record becoming the de-facto official record in lieu of there being a master copy.

Transactions are broadcast, and every node is creating their own updated version of events.
It is this difference that makes blockchain technology so useful – It represents an innovation in information registration and distribution that eliminates the need for a trusted party to facilitate digital relationships.
Yet, blockchain technology, for all its merits, is not a new technology.
Rather, it is a combination of proven technologies applied in a new way. It was the particular orchestration of three technologies (the Internet, private key cryptography and a protocol governing incentivization) that made bitcoin creator Satoshi Nakamoto's idea so useful.
The result is a system for digital interactions that does not need a trusted third party. The work of securing digital relationships is implicit — supplied by the elegant, simple, yet robust network architecture of blockchain technology itself.
Defining digital trust
Trust is a risk judgement between different parties, and in the digital world, determining trust often boils down to proving identity (authentication) and proving permissions (authorization). 

Put more simply, we want to know, 'Are you who you say you are?' and 'Should you be able to do what you are trying to do?'

In the case of blockchain technology, private key cryptography provides a powerful ownership tool that fulfills authentication requirements. Possession of a private key is ownership. It also spares a person from having to share more personal information than they would need to for an exchange, leaving them exposed to hackers.

Authentication is not enough. Authorization – having enough money, broadcasting the correct transaction type, etc – needs a distributed, peer-to-peer network as a starting point. A distributed network reduces the risk of centralized corruption or failure.

This distributed network must also be committed to the transaction network’s recordkeeping and security. Authorizing transactions is a result of the entire network applying the rules upon which it was designed (the blockchain’s protocol). 

Authentication and authorization supplied in this way allow for interactions in the digital world without relying on (expensive) trust. Today, entrepreneurs in industries around the world have woken up to the implications of this development – unimagined, new and powerful digital relationshionships are possible. Blockchain technology is often described as the backbone for a transaction layer for the Internet, the foundation of the Internet of Value. 

In fact, the idea that cryptographic keys and shared ledgers can incentivize users to secure and formalize digital relationships has imaginations running wild. Everyone from governments to IT firms to banks is seeking to build this transaction layer.
Authentication and authorization, vital to digital transactions, are established as a result of the configuration of blockchain technology.

The idea can be applied to any need for a trustworthy system of record.

Bitmain Subsidiary Opens New Bitcoin Mining Pool to Public

An R&D division of mining giant Bitmain has launched a new pool.
Having mined its first block as part of a closed beta three months ago, BitmainTech Ltd is now opening its ConnectBTC pool to global bitcoin miners, inviting them to run the software as a way to combine resources with other miners and better compete for bitcoin's rewards.
ConnectBTC manager Gadi Glikberg explained that the pool was written from scratch by a team independent from Bitmain's signature AntPool operation – a mining pool that's currently the leader in combined hashing power, according to data from Blockchain.
"We believe in this manner we can make sure we serve the mining community with the best possible products," Gilkberg said.
Notably, ConnectBTC appears to be operating slightly out of step with its parent company, which has been one of the more vocal proponents of the idea network participants should run alternative software versions that would expand the size of the transactions blocks it can process.
ConnectBTC, Glikberg said, is running the Bitcoin Core client, and noted that it's "not signaling" for either an upgrade to SegWit (the Core development team's preferred solution) or Bitcoin Unlimited (an alternative software Bitmain has said it intends to support).

Such public remarks have recently seen Bitmain reignite the long-standing debate on how bitcoin will increase its transaction capacity, while boosting concerns the network could potentially split into two competing blockchain networks.

Purse Proposal Touts Extension Blocks as Bitcoin Scaling Solution

Bitcoin startup Purse is spearheading work on a new solution it believes could break the network's long-simmering scaling gridlock.
In a new blog post issued today, Purse has released a specification that includes demo functionality and code for upgrading its bitcoin software implementation, Bcoin, to support "extension blocks". The technical update seeks to enable the network to optionally support different kinds of blocks in addition to the default 1 MB blocks that today make up the main bitcoin blockchain (and that have long been a source of community tension).
The move to develop the technology finds Purse pitching its implementation – one that is today an alternative to versions by Bitcoin Core and Bitcoin Unlimited – as a third option in the scaling debate that would bring about a block size increase and malleability fix via soft fork, or a change that doesn't risk splitting the bitcoin blockchain.
Founded in 2014 as a startup that enables bitcoin users to get discounts when shopping at Amazon, Purse has been increasingly interested in network development, launching Bcoin in September of last year.
Developer Joseph Poon and BitPay CEO Stephen Pair contributed to the release.
So far, the idea is said to have support from bitcoin's mining community, though miners did not have any preferred access to the code, a source said.
Industry firms also appear to be anticipating the release, with BitPay reporting it is eager to test the idea as an alternative to a contentious hard fork. In remarks, CEO Stephen Pair said the bitcoin payments processing startup was afraid of needing to shut down in the face of such an event, and that it is open to all alternative ideas.
Path ahead
As for how the idea would progress, those close to the project expressed that they want the announcement to be viewed as the start of a conversation on the idea.
So far, it seems there is enthusiasm among some network stakeholders, with mining pool F2Pool even citing the software last week, embedding a message in the bitcoin blockchain that referenced the proposal.
Mining firm ViaBTC, an outspoken supporter of the Bitcoin Unlimited software, also tweeted its approval for the concept, and Bitmain is said to be supportive as well.
An effort was also made to heavily publicize the effort with major media outlets as a potentially "momentous" development for the network.
As detailed in the post, the idea is to now garner miner support for the technical fix.
"Once a supermajority of miners have flagged for this change, users can begin using these features enabling entirely new use cases for bitcoin," the post reads.
Purse went on to state that it would like for the resulting conversation to involve "users, miners and industry", remarking that any eventual upgrade is still months away.
Past precedent
If introduced, this would not be the first time work on a proposal for extension blocks would see public discussion.
Commentary on the proposal surfaced on the bitcoin development mailing list as far back as 2015, when Blockstream CEO Adam Back discussed how the network might adopt extension blocks.
"The interesting thing is this makes block sizes changes opt-in and gives users choice. Choice is good," Back wrote.
A more extended history of discussion on the concept can be found in the mailing list archives as well.
As recently as this January, the subject was advanced again, though some developers offered concerns about the change.
Bitcoin Core developers indicated that they are aware of the proposal, responding with concerns about the complexity of the code, as well as the precedent that could occur should the proposal be aggressively adopted by one constituency of the network or without sufficient review.

Worries were also raised about how this would affect access to the network, and whether technicality increases brought about by more custom blocks would only be accessible to a minority stakeholders and users.