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 0xa4b91b8719ccad1a56722ebc55d4a334e81c7639e19b7f971f3c9243d78e9696. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c6c3ca9-8d15-4638-a02a-71b58ee1ab6b.json and https://artists.proofprofile.net/proofs/artist/3c6c3ca9-8d15-4638-a02a-71b58ee1ab6b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).