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A blockchain is a distributed database that is shared among the nodes of a computer network. As a database, a blockchain stores information electronically in digital format. Blockchains are best known for their crucial role in cryptocurrency systems, such as Bitcoin, for maintaining a secure and decentralized record of transactions.
Blockchain: What it is and How it Works - NerdWallet
Blockchain technology might be one of the most-hyped innovations of the 21st century. Developed to support , blockchains now power thousands of cryptocurrencies, and developers are working on integrating the technology into businesses, including medicine, art and finance.
What Is Blockchain and How Does It Work? | Synopsys
A blockchain is "a distributed database that maintains a continuously growing list of ordered records, called blocks." These blocks "are linked using cryptography. Each block contains a cryptographic hash of the previous block, a timestamp, and transaction data.