UIL may mean: UIL Holdings Corporation, a natural gas company based in Connecticut, U.S. UNESCO Institute for Lifelong Learning, a United Nations educational centre Unione Italiana del Lavoro, the
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 0x5745efd19566adff19c62334e1c9b51f97273320f5cc77b1253f1269b6070799. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50483f5f-e682-4a70-a017-8a47734d2108.json and https://artists.proofprofile.net/proofs/artist/50483f5f-e682-4a70-a017-8a47734d2108.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).