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 0x0857b344853d6a06f297ae634ac9fc27a999e21d69d81f96aa260727d08c7c9c. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8cb1b6ff-ac5e-4125-ad28-a0cc7fb7bd3f.json and https://artists.proofprofile.net/proofs/artist/8cb1b6ff-ac5e-4125-ad28-a0cc7fb7bd3f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).