Peter Barkworth
type: MusicGroup
genre: spoken word
description: Peter Wynn Barkworth (14 January 1929 – 21 October 2006)The Daily Telegraph Issue 47,338 (16 August 2007) p28 reported that he left estate valued at £2,256,862 and a collection of paintings and drawin
popularity: 2
followers: 37
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa8124c136aaa365e841d738bdbd8257394c6e751bdf4037898d7b377a0aba87c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/dec6e3e1-fe75-4cac-8cd5-02a44acafd75.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/dec6e3e1-fe75-4cac-8cd5-02a44acafd75.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/dec6e3e1-fe75-4cac-8cd5-02a44acafd75
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa8124c136aaa365e841d738bdbd8257394c6e751bdf4037898d7b377a0aba87c","name":"Peter Barkworth","registered_at":"2026-06-21T05:39:00Z","symbol":"NIM1836654","token_address":"0x3f7ff1b7009221bda8d9f9091977088bd106163e","type":"artist","uuid":"dec6e3e1-fe75-4cac-8cd5-02a44acafd75"}
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 0xa8124c136aaa365e841d738bdbd8257394c6e751bdf4037898d7b377a0aba87c. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dec6e3e1-fe75-4cac-8cd5-02a44acafd75.json and https://artists.proofprofile.net/proofs/artist/dec6e3e1-fe75-4cac-8cd5-02a44acafd75.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0xa8124c136aaa365e841d738bdbd8257394c6e751bdf4037898d7b377a0aba87c","name":"Peter Barkworth","registered_at":"2026-06-21T05:39:00Z","symbol":"NIM1836654","token_address":"0x3f7ff1b7009221bda8d9f9091977088bd106163e","type":"artist","uuid":"dec6e3e1-fe75-4cac-8cd5-02a44acafd75"}