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 0x25eb271d4ebe4f8c4c57f8c58d7bc87c3cadc6e05304e1799d112044d1441ef5. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb33efd5-b8e9-4010-a5ad-9cfe0c6f99d0.json and https://artists.proofprofile.net/proofs/artist/cb33efd5-b8e9-4010-a5ad-9cfe0c6f99d0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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