William, Bill, or Billy Turner may refer to: Arts and entertainment William Turner (composer) (1651–1740), English baroque composer J. M. W. Turner (William Turner, 1775–1851), English Romantic lan
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 0x108f7b33da43327ac717a6b78173034c0c506faea42bce1ba10b2b73c792801e. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6a41417-68c2-436c-849c-bf2ee26ad0aa.json and https://artists.proofprofile.net/proofs/artist/e6a41417-68c2-436c-849c-bf2ee26ad0aa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).