thumb|right|200px|The Louis Moholo Quintet performing at a jazz club A jazz club is a venue where the primary entertainment is the performance of live jazz music, although some jazz clubs primarily fo
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2911ee9d793957539a4cca6344e3107efa6c322ae4afae5f44f26cea2945062a. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/886b26da-8ebc-4d7b-ac81-427735033f5a.json and https://artists.proofprofile.net/proofs/artist/886b26da-8ebc-4d7b-ac81-427735033f5a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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