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 0xdd0bd2c3d64bdb9a2542eff76cb5ca3f1cf23af3d968aaf39556fe919672c87e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0f2a8fe-6599-48a5-abcf-667ee2ff57bb.json and https://artists.proofprofile.net/proofs/artist/e0f2a8fe-6599-48a5-abcf-667ee2ff57bb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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