thumb|250px|Liev Tuk, from an early 1970s record cover. Liev Tuk (sometimes spelled Liv Tek, ) was a Cambodian rock and soul musician active before the Khmer Rouge. Musical style Tuk's music incorpor
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df71839c47cdda020d6206465b64da727a4c45ece77731f75566452de831ed5. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a75e0898-5b05-4ffd-a0a9-8c22fd0f00b7.json and https://artists.proofprofile.net/proofs/artist/a75e0898-5b05-4ffd-a0a9-8c22fd0f00b7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).