How Distributed Consensus Works

Bitcoin has no central server. Instead, thousands of peers (like A, B, and C) maintain the file together.

• Propagation: When Peer A mines a block, they broadcast the result. Peer B and C receive it and update their file instantly.
• Immutability: If Peer A hacks a past block, their chain becomes valid only to them. Peer B and C (the majority) will reject Peer A's hacked chain.