But how does bitcoin actually work?

Summary

This is one of the most acclaimed explanations of Bitcoin ever created. 3Blue1Brown walks through digital signatures, cryptographic hashing, decentralized verification and the Proof of Work mechanism that secures the Bitcoin network — all using beautiful visual animations.

Key Concepts

Things To Remember

• Bitcoin uses cryptographic signatures to prove ownership without revealing private keys.
• Miners compete to solve a computational puzzle — the winner adds the next block.
• The blockchain is a shared, tamper-evident record of every Bitcoin transaction.
• No central authority controls Bitcoin — the network itself validates transactions.

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