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 0x375e3189ee396fbd2893e08bf39ab49d1103565a039c7917c3b5cea0f47c15f4. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0efe5c7-5729-4ee8-ac91-1e0ad9914b9b.json and https://artists.proofprofile.net/proofs/artist/a0efe5c7-5729-4ee8-ac91-1e0ad9914b9b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).