Thomas Stewart Baker (born 20 January 1934) is an English actor and writer. He is best known for playing the fourth incarnation of the Doctor in the BBC science fiction series Doctor Who from 1974 to
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 0x9c7f21981ebbec63fdb556b85be80abc383317aa4a5e5d86020139807aef017b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/faa8721c-853c-44f2-9fa2-d50874ea9079.json and https://artists.proofprofile.net/proofs/artist/faa8721c-853c-44f2-9fa2-d50874ea9079.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tom Baker's Chicago Seven Live in Concert
The Strange Case of Dr. Jekyll and Mr. Hyde