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 0xf7c29977c1bcfb6ed10b1b309c6872d27874f33f618a335f422eb01719a24ce6. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4eb5813d-1a12-4527-bd5a-33b9c1b2619d.json and https://artists.proofprofile.net/proofs/artist/4eb5813d-1a12-4527-bd5a-33b9c1b2619d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).