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 0x4b7c7d9f64d8ce25454a29204e94301e589dc0d339169a9758aa9cdc90002fd1. Chain 2 (Bitcoin): anchored in block 953911 (2026-06-16T08:03:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1877d3aa-3c25-4b4e-8949-4ab251237025.json and https://artists.proofprofile.net/proofs/artist/1877d3aa-3c25-4b4e-8949-4ab251237025.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Katyusha International (Football Carnival)