Patricia Margaret "Pat" Keen (21 October 1933 – 1 March 2013) was an English actress whose career on stage, television and film ran from the 1950s to the 2000s. Born in Willesden, Brent, London, Keen
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 0x3e62261b3647cc4a805d5f6af61a2dbfd17e7667df7211e46377f9819e64fa73. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/936d8896-52c1-4fb0-a04f-5cba67b52fad.json and https://artists.proofprofile.net/proofs/artist/936d8896-52c1-4fb0-a04f-5cba67b52fad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).