The Bitcoin Blockchain is a public, digital ledger that records every Bitcoin transaction ever made. Think of it as a giant, tamper-proof notebook shared across thousands of computers worldwide. It’s the backbone of Bitcoin, launched on January 3, 2009, when Satoshi Nakamoto mined the first block (the "genesis block"). Unlike a bank’s ledger, controlled by one entity, this one’s decentralized nobody owns it, and anyone can verify it. That’s the magic, it's transparent yet secure, running on a network of nodes (computers) that keep it in sync.
