Pat Keen
type: MusicGroup
description: 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
popularity: 11
followers: 499
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3e62261b3647cc4a805d5f6af61a2dbfd17e7667df7211e46377f9819e64fa73
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953730
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953730
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/936d8896-52c1-4fb0-a04f-5cba67b52fad.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/936d8896-52c1-4fb0-a04f-5cba67b52fad.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/936d8896-52c1-4fb0-a04f-5cba67b52fad
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T02:47:28Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3e62261b3647cc4a805d5f6af61a2dbfd17e7667df7211e46377f9819e64fa73","name":"Pat Keen","registered_at":"2026-06-14T19:56:04Z","symbol":"NIM0559751","token_address":"0xe8d21c48880fcd7bbe288c956f51c15b24bccbb3","type":"artist","uuid":"936d8896-52c1-4fb0-a04f-5cba67b52fad"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: 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).
  date published: 2026-06-15T02:47:28Z
  text: {"copyright_id":"0x3e62261b3647cc4a805d5f6af61a2dbfd17e7667df7211e46377f9819e64fa73","name":"Pat Keen","registered_at":"2026-06-14T19:56:04Z","symbol":"NIM0559751","token_address":"0xe8d21c48880fcd7bbe288c956f51c15b24bccbb3","type":"artist","uuid":"936d8896-52c1-4fb0-a04f-5cba67b52fad"}
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