# What is blockchain. 01 bubbletalk

By [Bubbletalk](https://paragraph.com/@bubbletalk) · 2023-06-29

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Blockchain is a decentralized digital ledger that stores data in a way that makes it difficult to alter or manipulate. It consists of a network of computers, each of which contains a copy of the blockchain. The computers communicate with each other to maintain a consistent and accurate record of all transactions on the network. Each block in the blockchain contains a cryptographic hash of the previous block, a timestamp, and transaction data. Once a block is added to the chain, it cannot be altered without invalidating all subsequent blocks. This makes the blockchain tamper-proof and provides a high level of security. Blockchain technology is most commonly associated with cryptocurrencies like Bitcoin. However, it has a wide range of potential applications beyond finance, including supply chain management, voting systems, and decentralized identity management.

[https://www.youtube.com/shorts/W\_6IhgrMJk4](https://www.youtube.com/shorts/W_6IhgrMJk4)

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*Originally published on [Bubbletalk](https://paragraph.com/@bubbletalk/what-is-blockchain-01-bubbletalk)*