How Does Blockchain Work?

1. A transaction happens.

2. It's grouped with others into a block.

3. Computers (miners or validators) compete or agree to verify it using math puzzles (consensus).

4. The block gets a unique "fingerprint" (hash) and links to the previous block.

5. It's added to the chain and copied to all nodes.

If someone tries to change an old block, the links break, and everyone rejects it. Super secure!

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