Jack Walker
type: MusicGroup
description: Jack Walker (19 May 1929 – 17 August 2000) was a British industrialist and businessman. Walker built his fortune in the steel industry, amassing a personal fortune of £600 million. He then went on
popularity: 3
followers: 11
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x606caec78f8760b297aabb71c80c48854b527d4fb3224eec9714bcfa7fe9707f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954555
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954555
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/af508005-59fb-49eb-9758-b2c041ff9ce5.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/af508005-59fb-49eb-9758-b2c041ff9ce5.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/af508005-59fb-49eb-9758-b2c041ff9ce5
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T12:10:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x606caec78f8760b297aabb71c80c48854b527d4fb3224eec9714bcfa7fe9707f","name":"Jack Walker","registered_at":"2026-06-20T11:21:48Z","symbol":"NIM1601639","token_address":"0xbffc7932fbc7cf91bc36222ad14c49393520009c","type":"artist","uuid":"af508005-59fb-49eb-9758-b2c041ff9ce5"}
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 0x606caec78f8760b297aabb71c80c48854b527d4fb3224eec9714bcfa7fe9707f. Chain 2 (Bitcoin): anchored in block 954556 (2026-06-20T12:14:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af508005-59fb-49eb-9758-b2c041ff9ce5.json and https://artists.proofprofile.net/proofs/artist/af508005-59fb-49eb-9758-b2c041ff9ce5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T12:14:15Z
  text: {"copyright_id":"0x606caec78f8760b297aabb71c80c48854b527d4fb3224eec9714bcfa7fe9707f","name":"Jack Walker","registered_at":"2026-06-20T11:21:48Z","symbol":"NIM1601639","token_address":"0xbffc7932fbc7cf91bc36222ad14c49393520009c","type":"artist","uuid":"af508005-59fb-49eb-9758-b2c041ff9ce5"}
album: A Detective Story (Original Concept Soundtrack)
  type: MusicAlbum
  date published: 2025-05-02
album: The Woman In White (Unheard Theatre Soundtrack)
  type: MusicAlbum
  date published: 2025-05-08
album: Scores from a Drama School
  type: MusicAlbum
  date published: 2025-07-25
album: A Spy Story
  type: MusicAlbum
  date published: 2025-09-08