John Turner (12 August 1947 – 1 May 2002), known professionally as John Nathan-Turner, was a British television producer. He was the ninth producer of the long-running BBC science fiction series Docto
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 0x0e40eca85c2628b048cb8d73c048b44eb79519b17af75bf01fbc66870594ba4e. 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/465663c0-5b13-4ffd-ad1e-b92b558576a8.json and https://artists.proofprofile.net/proofs/artist/465663c0-5b13-4ffd-ad1e-b92b558576a8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
John Nathan-Turner Memoirs Volume 1-2 (Unabridged)