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 0xc1882b877d74644d33bf570b2ce4508aa4f73b0ab5b82fbc562d28b5b8b7cfdd. 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/8285ad48-acbf-4d4e-b883-8553b8b18666.json and https://artists.proofprofile.net/proofs/artist/8285ad48-acbf-4d4e-b883-8553b8b18666.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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