as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
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provide a definition of a blockchain.
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a blockchain is a distributed ledger technology which records immutable data in a secure and transparent way by using cryptographic hashes and distributed consensus protocols. it is decentralized and can be used for a variety of applications, such as financial transactions, identity management and supply chain management.
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