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 0x4d77f63cc3d6f536e39f654f3d7cfe977e9b94f407fe4489e1b1c2ae768ee1e5. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df7f1db9-ba30-4bc5-8a0d-6d1f50f91031.json and https://artists.proofprofile.net/proofs/artist/df7f1db9-ba30-4bc5-8a0d-6d1f50f91031.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).