Des Cohen
type: MusicGroup
description: Desmond Vernon Cohen (8 August 1927 – 24 February 2012) was a South African swimmer. He competed in the men's 200 metre breaststroke at the 1948 Summer Olympics and the water polo tournament at the 19
popularity: 2
followers: 342
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe6e315167052d148b689e22bb95a7f1a48a1b0d5d7b26e02cdb4eec7e21f99bc
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6102bbf6-3c9c-4b86-9028-27a3a1f2640f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6102bbf6-3c9c-4b86-9028-27a3a1f2640f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/6102bbf6-3c9c-4b86-9028-27a3a1f2640f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe6e315167052d148b689e22bb95a7f1a48a1b0d5d7b26e02cdb4eec7e21f99bc","name":"Des Cohen","registered_at":"2026-06-16T23:26:00Z","symbol":"NIM1208943","token_address":"0xf1b98dce6fecd8e61db97493d4b0f841b1baab2f","type":"artist","uuid":"6102bbf6-3c9c-4b86-9028-27a3a1f2640f"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e315167052d148b689e22bb95a7f1a48a1b0d5d7b26e02cdb4eec7e21f99bc. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6102bbf6-3c9c-4b86-9028-27a3a1f2640f.json and https://artists.proofprofile.net/proofs/artist/6102bbf6-3c9c-4b86-9028-27a3a1f2640f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xe6e315167052d148b689e22bb95a7f1a48a1b0d5d7b26e02cdb4eec7e21f99bc","name":"Des Cohen","registered_at":"2026-06-16T23:26:00Z","symbol":"NIM1208943","token_address":"0xf1b98dce6fecd8e61db97493d4b0f841b1baab2f","type":"artist","uuid":"6102bbf6-3c9c-4b86-9028-27a3a1f2640f"}
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