Explore the Bitcoin blockchain
Bitcoin is a decentralized digital currency, without a central bank or single administrator, that can be sent from user to user on the peer-to-peer bitcoin network without the need for intermediaries. Transactions are verified by network nodes through cryptography and recorded in a public distributed ledger called a blockchain. Bitcoin was invented in 2008 by an unknown person or group of people using the name Satoshi Nakamoto and started in 2009 when its source code was released as open-source software.
Bitcoin was created in 2009 by a pseudonymous developer named Satoshi Nakamoto. It was the first cryptocurrency and remains the largest by market capitalization. The Bitcoin whitepaper, titled "Bitcoin: A Peer-to-Peer Electronic Cash System," was published on October 31, 2008. The first block, known as the genesis block, was mined on January 3, 2009. The first real-world transaction took place on May 22, 2010, when Laszlo Hanyecz purchased two pizzas for 10,000 BTC, an amount that would be worth millions of dollars today.
Bitcoin operates on a decentralized public ledger technology called the blockchain. This blockchain is maintained by a distributed network of computers (nodes) running the Bitcoin software. Transactions are verified by network nodes through cryptography and recorded in the blockchain. New bitcoins are created as a reward for miners who verify and record transactions in the blockchain through a process called mining. The mining process involves solving complex mathematical problems that require substantial computational power.
Bitcoin has a fixed supply cap of 21 million coins, making it a deflationary asset. The rate at which new bitcoins are created is halved approximately every four years in an event known as the "halving." This controlled supply schedule is designed to mimic the extraction rate of precious metals like gold. Bitcoin's value is determined by market forces of supply and demand, without the intervention of central authorities.
The pseudonymous person or group who created Bitcoin and authored the Bitcoin whitepaper.
One of the early Bitcoin developers who was chosen by Satoshi Nakamoto to lead the project after his departure.
Current lead maintainer of the Bitcoin Core software.
Co-founder of Blockstream and one of the most prolific Bitcoin Core contributors.
Satoshi Nakamoto published the Bitcoin whitepaper titled "Bitcoin: A Peer-to-Peer Electronic Cash System."
The first Bitcoin block (block 0) was mined by Satoshi Nakamoto, marking the launch of the Bitcoin network.
Laszlo Hanyecz purchased two pizzas for 10,000 BTC, establishing the first real-world value for Bitcoin.
The first Bitcoin halving occurred, reducing the block reward from 50 BTC to 25 BTC.
The second Bitcoin halving occurred, reducing the block reward from 25 BTC to 12.5 BTC.
Bitcoin Cash forked from the main Bitcoin blockchain, increasing the block size to 8MB.
Segregated Witness (SegWit) was activated on the Bitcoin network, increasing transaction capacity.
The third Bitcoin halving occurred, reducing the block reward from 12.5 BTC to 6.25 BTC.
The Taproot upgrade was activated, improving privacy, efficiency, and smart contract functionality.
The fourth Bitcoin halving is expected to occur, reducing the block reward from 6.25 BTC to 3.125 BTC.