Historical retrospective · Bitcoin
BIP 322 proposed a general format for signing Bitcoin messages
BIP 322 describes a way to prove control of a Bitcoin output by signing a message using a transaction-like construction.
The approach aims to cover modern script types more generally than legacy message-signing conventions.
It connects wallet identity proofs with Bitcoin’s evolving script system without requiring a payment transaction.
Message signing can prove key control at a point in time, but it does not establish a person’s legal identity or intent beyond the signed text.
Primary source
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