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 0xa612c27f28c7ac92d95677f5478de98c7f5593a5099176ca264b0652a3f7bdaf. 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/9acbd0d2-a342-486d-8a33-61c50e28d0f7.json and https://artists.proofprofile.net/proofs/artist/9acbd0d2-a342-486d-8a33-61c50e28d0f7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).