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Context:) is a protocol which implements a highly available, public, permanent, and decentralized ledger. Bitcoin (abbreviation: BTC[a] or XBT[b]; sign: <unk>) is a protocol which implements a highly available, public, permanent, and decentralized ledger. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Protocol specifies that the entry indicates an amount of a token, bitcoin with a minuscule b. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️   Bitcoin transactions are verified by network nodes through cryptography and recorded in a public distributed ledger called a blockchain.<unk> Bitcoin transactions are verified by network nodes through cryptography and recorded in a public distributed ledger called a blockchain. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ The currency began use in 2009, when its implementation was released as open-source software.: ch. The word "bitcoin" was defined in a white paper published on October 31, 2008. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️   The Library of Congress reports that, as of November 2021, nine countries have fully banned bitcoin use, while a further forty-two have implicitly banned it. The Library of Congress reports that, as of November 2021, nine countries have fully banned bitcoin use, while a further forty-two have implicitly banned it. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ El Salvador has adopted Bitcoin as legal tender, although use by merchants remains low. El Salvador has adopted Bitcoin as legal tender, although use by merchants remains low. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Iran has used bitcoin to bypass sanctions.<unk> Iran has used bitcoin to bypass sanctions.
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