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 0xe87d8d8bb0a772caaf164d16e7e87ece25a6618d05ec0bddca689761a8d2c424. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9449825c-f7b3-4adf-9f82-84fef8bd26ea.json and https://artists.proofprofile.net/proofs/artist/9449825c-f7b3-4adf-9f82-84fef8bd26ea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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