Jack Dash
type: MusicGroup
description: Jack O'Brien Dash (23 February 1907 – 8 June 1989) was a British communist and trade union leader, famous for his role in London dock strikes. Born in Southwark to a family which was often in poverty
popularity: 3
followers: 233
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1101335de1d73bd2329808ce06abdd683c08c02770de196d655f3edb394cb720
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954784
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954784
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fcda32d1-ccd4-4342-9ac9-c7fc52b7229e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fcda32d1-ccd4-4342-9ac9-c7fc52b7229e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/fcda32d1-ccd4-4342-9ac9-c7fc52b7229e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-22T02:53:59Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1101335de1d73bd2329808ce06abdd683c08c02770de196d655f3edb394cb720","name":"Jack Dash","registered_at":"2026-06-21T17:54:50Z","symbol":"NIM1989803","token_address":"0xd93d6f74a013a6c39367595c0302973cbfba1323","type":"artist","uuid":"fcda32d1-ccd4-4342-9ac9-c7fc52b7229e"}
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 0x1101335de1d73bd2329808ce06abdd683c08c02770de196d655f3edb394cb720. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fcda32d1-ccd4-4342-9ac9-c7fc52b7229e.json and https://artists.proofprofile.net/proofs/artist/fcda32d1-ccd4-4342-9ac9-c7fc52b7229e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-22T02:53:59Z
  text: {"copyright_id":"0x1101335de1d73bd2329808ce06abdd683c08c02770de196d655f3edb394cb720","name":"Jack Dash","registered_at":"2026-06-21T17:54:50Z","symbol":"NIM1989803","token_address":"0xd93d6f74a013a6c39367595c0302973cbfba1323","type":"artist","uuid":"fcda32d1-ccd4-4342-9ac9-c7fc52b7229e"}
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