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 0x3e09742bf99a8f3ae52b2cf472d55d05c85f6f0c925b9f69b9a1565a287af1dd. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bc142b0-6571-4d9e-b15e-b0116a97df2f.json and https://artists.proofprofile.net/proofs/artist/6bc142b0-6571-4d9e-b15e-b0116a97df2f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).