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 0x7358a9d4fe1ef14ec6f1062faa547569939c07d474179092c9b8dfe908ecf4d4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b5609cc-ee2f-4d1e-bf3d-14b48a145786.json and https://artists.proofprofile.net/proofs/artist/1b5609cc-ee2f-4d1e-bf3d-14b48a145786.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).