# What Is a Blockchain?

By [Eth Punks](https://paragraph.com/@eth-punks) · 2023-03-23

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A blockchain is an open, distributed ledger that records transactions in code. In practice, it’s a little like a checkbook that’s distributed across countless computers around the world. Transactions are recorded in “blocks” that are then linked together on a “chain” of previous cryptocurrency transactions.

“Imagine a book where you write down everything you spend money on each day,” says Buchi Okoro, CEO and co-founder of African cryptocurrency exchange Quidax. “Each page is similar to a block, and the entire book, a group of pages, is a blockchain.”

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*Originally published on [Eth Punks](https://paragraph.com/@eth-punks/what-is-a-blockchain)*