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 0xa92f185bb1020a06d3a687ecf82acbcd9e391c819c84fde8606597ee0acc9831. Chain 2 (Bitcoin): anchored in block 953709 (2026-06-14T23:31:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d52cbfe-d4f5-4b62-b5eb-98fcf24aaded.json and https://artists.proofprofile.net/proofs/artist/7d52cbfe-d4f5-4b62-b5eb-98fcf24aaded.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).