1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a21862a7daf8627d6b9ca236a37b1e3b8c64333aa5f6f7af3f6eb019d971b9. Chain 2 (Bitcoin): anchored in block 953954 (2026-06-16T14:18:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25976e7c-4888-4db6-81cd-cca1532ffca0.json and https://artists.proofprofile.net/proofs/artist/25976e7c-4888-4db6-81cd-cca1532ffca0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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