David Llewellyn may refer to: David Llewellyn (Australian politician) (born 1942), member of the Parliament of Tasmania David Llewellyn (British politician) (1916–1992), British Member of Parliament
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 0xc99549f18cb336927b6d198722c7dc6b2666c214e71f1cd1e162db0635f159c3. Chain 2 (Bitcoin): anchored in block 953930 (2026-06-16T10:36:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ee892f0-ff0c-4982-881b-0120c2b3dff4.json and https://artists.proofprofile.net/proofs/artist/1ee892f0-ff0c-4982-881b-0120c2b3dff4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Worlds of Big Finish (Audiodrama Unabridged)
Cicero - Though Scoundrels Are Discovered (Audiodrama Unabridged)