January 3, 2009
Bitcoin genesis block mined
Satoshi Nakamoto mined the BitcoinThe first decentralized cryptocurrency — a proof-of-work blockchain without a central issuer. genesis block on January 3, 2009 — launching the first block in a proof-of-workA consensus mechanism — miners compete to solve puzzles to validate blocks and earn rewards. chain that still runs today.
What it was for
Block 0 embedded a Times headline about bank bailouts and began the 50 BTC subsidy schedule halving every four years. Running `bitcoind` meant joining a peer network with no company, no CEO, and no pre-mine — a template every altcoin and smart-contract chain later copied or reacted against.
Why it's here
The genesis block turned the BitcoinThe first decentralized cryptocurrency — a proof-of-work blockchain without a central issuer. whitepaper into running software.
Why it mattered
It proved a decentralized ledger could launch without a trusted issuer.
What it solved
Digital cash needed a live network, not just a theoretical design.
Media
- ImageBitcoin
Grayliptrot, Public domain, via Wikimedia Commons
Related
- Bitcoin whitepaper publishedOctober 31, 2008
- Ethereum mainnet launchesJuly 30, 2015
- First real-world Bitcoin purchaseMay 22, 2010