Jean Harduin
type: MusicGroup
popularity: 8
followers: 418
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xcab3c3d482438c3e6b773f7001b9c950b060c18200b72ffb7a3fa554f195bc1b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954043
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954043
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4079110a-e281-4ac1-aa5f-c4aee2264af3.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4079110a-e281-4ac1-aa5f-c4aee2264af3.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/4079110a-e281-4ac1-aa5f-c4aee2264af3
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T04:15:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xcab3c3d482438c3e6b773f7001b9c950b060c18200b72ffb7a3fa554f195bc1b","name":"Jean Harduin","registered_at":"2026-06-16T12:00:50Z","symbol":"NIM1045482","token_address":"0xbc7eae678c853a4e0119b334613d35764e0a1535","type":"artist","uuid":"4079110a-e281-4ac1-aa5f-c4aee2264af3"}
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 0xcab3c3d482438c3e6b773f7001b9c950b060c18200b72ffb7a3fa554f195bc1b. 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/4079110a-e281-4ac1-aa5f-c4aee2264af3.json and https://artists.proofprofile.net/proofs/artist/4079110a-e281-4ac1-aa5f-c4aee2264af3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xcab3c3d482438c3e6b773f7001b9c950b060c18200b72ffb7a3fa554f195bc1b","name":"Jean Harduin","registered_at":"2026-06-16T12:00:50Z","symbol":"NIM1045482","token_address":"0xbc7eae678c853a4e0119b334613d35764e0a1535","type":"artist","uuid":"4079110a-e281-4ac1-aa5f-c4aee2264af3"}
album: Le P'tit Bal A Jean
  type: MusicAlbum
  date published: 2010-05-25
album: Mes Années 70 Et 80 Vol. 2
  type: MusicAlbum
  date published: 2010-08-01
album: Mes Années 70 Et 80 Vol. 1
  type: MusicAlbum
  date published: 2010-08-01
album: Mes années 70 et 80 Vol. 3
  type: MusicAlbum
  date published: 2011-07-13
album: Mes années 70 et 80 Vol. 4
  type: MusicAlbum
  date published: 2012-07-09
album: 7 merveilles de la musique: Jean Harduin
  type: MusicAlbum
  date published: 2012-08-13
album: Mes années 70 et 80, Vol. 5
  type: MusicAlbum
  date published: 2013-07-05
album: Mes années 70 et 80
  type: MusicAlbum
  date published: 2014-11-17
album: Musette à la Campagne 1
  type: MusicAlbum
  date published: 2019-09-17
album: Musette à la campagne 2
  type: MusicAlbum
  date published: 2019-09-20