A timestamp in blockchain is the exact moment when a particular block is mined and validated to the blockchain. It serves as a record of the time at which a transaction or event occurred, ensuring the chronological order of blocks.
Timestamps ensure that transactions are added to the blockchain in the correct order, preventing issues like double-spending. Blocks are added sequentially, and the timestamp helps establish the correct chain of events, especially in the event of forks or other network issues.
In Proof of Work (PoW) blockchains like Bitcoin, timestamps are critical in verifying that the appropriate amount of time has passed between blocks. In platforms like Ethereum, timestamps are used in smart contracts to trigger events, set deadlines, and enforce rules at specific times.
