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What is Blockchain?
blockchainA blockchain is a distributed, immutable digital ledger that records transactions across a network of computers. Each block contains a batch of transactions linked to the previous block via cryptographic hashes.
Full Explanation
A blockchain is a type of distributed ledger technology (DLT) where data is stored in sequential blocks, each cryptographically linked to the one before it. This chain structure makes it extremely difficult to alter past records without detection. Blockchains can be public (like Bitcoin, Ethereum) or private (enterprise use). They enable trustless, transparent record-keeping without a central authority. Beyond cryptocurrency, blockchains power smart contracts, NFTs, DeFi, and supply chain tracking.
Example
When you send Bitcoin to someone, the transaction is recorded on the Bitcoin blockchain. Anyone can verify it by searching the transaction hash on a block explorer.
Related Terms
Last updated: 2026-03-21
