The technology that powers the blockchain behind cryptocurrencies like Bitcoin is called distributed ledger technology (DLT). Blockchain operates as a decentralized database that securely records transactions across multiple nodes in a network, ensuring transparency and immutability. Each block in the blockchain contains a list of transactions, which are linked to previous blocks, forming a chain. This structure prevents tampering and allows for secure, peer-to-peer transactions without the need for intermediaries. DLT enables cryptocurrencies to function efficiently, fostering trust among users and making it a foundational technology for various applications beyond finance, such as supply chain management and identity verification.