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 0x55e6faa6c8469275ba708e51a434b7909c63ef4e518a4bbc36cc80aa9e3c5be4. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad66cb09-1fee-44de-bf3b-2d8f2e9f80fa.json and https://artists.proofprofile.net/proofs/artist/ad66cb09-1fee-44de-bf3b-2d8f2e9f80fa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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