John Couper
type: MusicGroup
popularity: 3
followers: 51
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc520e4e1236a79901da5c9ca912fc35bfc370a4c31303b86d6926a15415152ec
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954587
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954587
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b847524e-bb97-4684-9cbd-1c5ed683d288.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b847524e-bb97-4684-9cbd-1c5ed683d288.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b847524e-bb97-4684-9cbd-1c5ed683d288
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T19:10:41Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc520e4e1236a79901da5c9ca912fc35bfc370a4c31303b86d6926a15415152ec","name":"John Couper","registered_at":"2026-06-20T16:11:46Z","symbol":"NIM1650449","token_address":"0x91ab5913ae93035f3028be3f02adbe6297990001","type":"artist","uuid":"b847524e-bb97-4684-9cbd-1c5ed683d288"}
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 0xc520e4e1236a79901da5c9ca912fc35bfc370a4c31303b86d6926a15415152ec. Chain 2 (Bitcoin): anchored in block 954588 (2026-06-20T19:15:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b847524e-bb97-4684-9cbd-1c5ed683d288.json and https://artists.proofprofile.net/proofs/artist/b847524e-bb97-4684-9cbd-1c5ed683d288.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T19:15:05Z
  text: {"copyright_id":"0xc520e4e1236a79901da5c9ca912fc35bfc370a4c31303b86d6926a15415152ec","name":"John Couper","registered_at":"2026-06-20T16:11:46Z","symbol":"NIM1650449","token_address":"0x91ab5913ae93035f3028be3f02adbe6297990001","type":"artist","uuid":"b847524e-bb97-4684-9cbd-1c5ed683d288"}
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