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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31f465106bccd7d1fecb4e03dd3969452ddc578152cb4964c6e6bf84247676c. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6feeb14c-82fc-4224-bb42-7cc2a9f05c74.json and https://artists.proofprofile.net/proofs/artist/6feeb14c-82fc-4224-bb42-7cc2a9f05c74.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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