A unique identifier used to locate a blockchain transaction and inspect its status, asset movements, and fees.
The transaction hash is the primary source document for any on-chain activity: it proves the date, the assets moved, the counterparties, and the fee. When an exchange has closed or a wallet export is incomplete, hashes are how basis and transfers are reconstructed.
Yes. They are the strongest evidence of what happened and when, and they never disappear when a platform does.
Source: IRC 6001 (recordkeeping)
Last reviewed September 18, 2026. Tax rules change; confirm current law before acting.
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