# BlockChain

By [ahmi7.eth](https://paragraph.com/@ahmi7) · 2022-11-07

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Blockchain is a distributed database that maintains a continuously growing list of records called blocks. Each block typically contains a timestamp, a transaction ID, a transaction payload, and proof of work. Proof of Work is a security feature of Bitcoin that allows nodes to agree that a particular block was mined by a certain miner. Bitcoin nodes use the proof of work to prevent anyone from creating a block that contains an arbitrary transaction.

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*Originally published on [ahmi7.eth](https://paragraph.com/@ahmi7/blockchain)*