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 0x296709e03f77c151bd044508d1c5f1aeb7655944d2aa0e7a7985c5fc3c7a301f. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5240ac17-cc34-48ad-a6ff-2da9810fe15d.json and https://artists.proofprofile.net/proofs/artist/5240ac17-cc34-48ad-a6ff-2da9810fe15d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).