What is Blockchain? If this technology is so complex, why call it “blockchain?” At its most basic level, blockchain is literally just a chain of. A blockchain, originally block chain, is a growing list of records, called blocks, that are linked using cryptography. A blockchain is, in the simplest of terms, a time-stamped series of immutable records of data that is managed by a cluster of computers not owned by any single. Blockchain Bites: Square's Patent Posse, Binance's DeFi Bridge, SushiSwap's ,Co-Founder Speaks - CoinDesk.