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 0x21f47be520175ec5ddf351575033bc1f2ee309194c712ce1d778bbf94f2b37b6. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19e33f90-3399-48bb-afa4-f5dc3aeea7aa.json and https://artists.proofprofile.net/proofs/artist/19e33f90-3399-48bb-afa4-f5dc3aeea7aa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).