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 0x1735e276fa27be60b7b0d8a8237471bfed499eae100ee7f7f4f14bda5aadcf7c. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d949b922-5b1e-4fa4-b163-1fde647bfd3d.json and https://artists.proofprofile.net/proofs/artist/d949b922-5b1e-4fa4-b163-1fde647bfd3d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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