Marcel Campion
type: MusicGroup
popularity: 6
followers: 30
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5a8a7436652dd1839c3d4d322802f18af1584fe438c4a7f0f8b42c6013b06c9e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954631
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954631
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/cd5d8093-5265-442c-ab90-47ef11f78344.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/cd5d8093-5265-442c-ab90-47ef11f78344.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/cd5d8093-5265-442c-ab90-47ef11f78344
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T02:46:24Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x5a8a7436652dd1839c3d4d322802f18af1584fe438c4a7f0f8b42c6013b06c9e","name":"Marcel Campion","registered_at":"2026-06-21T00:03:56Z","symbol":"NIM1756564","token_address":"0x29cbfd0b92d67340334c9d43a67d486f0029c3cf","type":"artist","uuid":"cd5d8093-5265-442c-ab90-47ef11f78344"}
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 0x5a8a7436652dd1839c3d4d322802f18af1584fe438c4a7f0f8b42c6013b06c9e. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd5d8093-5265-442c-ab90-47ef11f78344.json and https://artists.proofprofile.net/proofs/artist/cd5d8093-5265-442c-ab90-47ef11f78344.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T02:46:24Z
  text: {"copyright_id":"0x5a8a7436652dd1839c3d4d322802f18af1584fe438c4a7f0f8b42c6013b06c9e","name":"Marcel Campion","registered_at":"2026-06-21T00:03:56Z","symbol":"NIM1756564","token_address":"0x29cbfd0b92d67340334c9d43a67d486f0029c3cf","type":"artist","uuid":"cd5d8093-5265-442c-ab90-47ef11f78344"}
album: Copain Django
  type: MusicAlbum
  date published: 2010
album: Copain Django
  type: MusicAlbum
  date published: 2023-07-06