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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd808f466ce0dd07fff97686aed9d8b0a282f6c6acd5ac1c09c648df971ccb2a2. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db93950d-e0a1-4f7d-b588-7d6c653fa210.json and https://artists.proofprofile.net/proofs/artist/db93950d-e0a1-4f7d-b588-7d6c653fa210.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).