Lawrence Pressman (born David Milton Pressman; July 10, 1939) is an American actor. He is best known for roles on Doogie Howser, M.D., Ladies' Man, Profiler, the title character on Mulligan's Stew, as
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 0xac059deada36d26f6754ef289b694570765ede9330891ec6870ed4ecf59540b4. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2bee4dd-d3fd-4208-98a1-9a1a12e5a3f9.json and https://artists.proofprofile.net/proofs/artist/c2bee4dd-d3fd-4208-98a1-9a1a12e5a3f9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).