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 0x28c6f6c9d14ecaeb248dfb53a148cc9c995d55e4c17a089f05f3c68c255eebfc. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d2870bf-80c1-4b56-9144-1396f5f25ed3.json and https://artists.proofprofile.net/proofs/artist/0d2870bf-80c1-4b56-9144-1396f5f25ed3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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