BIP322 clarifies ownership proofs using taproot upgrade mechanisms
A specification correction required reserved taproot mechanisms to produce inconclusive ownership results rather than automatically valid proofs.
BIP322 was corrected on October 23, 2026, to name taproot upgrade mechanisms explicitly in its upgradeable rules. Proofs relying on those reserved mechanisms were to be treated as inconclusive rather than accepted as valid demonstrations of ownership.
BIP322 describes generic signed-message proofs using Bitcoin's transaction and script machinery. A verifier must establish that the supplied proof demonstrates the claimed control, not simply that a constructed transaction satisfies a permissive rule reserved for a future upgrade.
That distinction is particularly important when consensus deliberately leaves room for new meanings. Behavior acceptable under current transaction-validation rules need not provide the evidence an ownership-checking application expects.
The October change corrected the proof specification. It did not change taproot consensus or move funds. It narrowed an interpretation at the boundary between Bitcoin's upgrade mechanisms and applications using Bitcoin scripts to verify statements.