right|thumb|Second Booke of Ayres William Corkine (fl. 1610 - 1617)Oxford was an English composer, lutenist, gambist and lyra viol player of the Renaissance. In private service in the second decade
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 0x6289390f7e8ad0b8ce621bfec35b24c1978efd86746770217abf37f6e59ac3a5. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28df7a0b-a3f6-4f1f-8ba2-5ced146b5665.json and https://artists.proofprofile.net/proofs/artist/28df7a0b-a3f6-4f1f-8ba2-5ced146b5665.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
William Corkine: Lessons and Ayres for the Lyra Viol – Complete Works