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 0x91d3b23b9dae175a72f41c98520d8fdfde06c6d473e9d92400fe3fb668a5ea5f. Chain 2 (Bitcoin): anchored in block 953879 (2026-06-16T02:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08dac5fe-6e72-4f62-b125-f4ba55d36af9.json and https://artists.proofprofile.net/proofs/artist/08dac5fe-6e72-4f62-b125-f4ba55d36af9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).