Heldon
type: MusicGroup
genre: krautrock
genre: progressive rock
genre: space rock
description: Heldon was a French electronic rock band originally active between 1974 and 1978, and led by guitarist Richard Pinhas. Other members included synthesizer player Patrick Gauthier and drummer François A
popularity: 11
followers: 5124
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0x3bd9824be47785b4dc6f2bd16e0077d7cce31bfcfa23fa4daf0ce95b464f3ed6
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953733
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/95eb6a0c-78a9-4a68-a705-d52d57478b5f.ots
additional property: OTSRecordURL
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T03:12:39Z
additional property: OTSCanonicalRecord
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 0x3bd9824be47785b4dc6f2bd16e0077d7cce31bfcfa23fa4daf0ce95b464f3ed6. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/95eb6a0c-78a9-4a68-a705-d52d57478b5f.json and https://artists.proofprofile.net/proofs/artist/95eb6a0c-78a9-4a68-a705-d52d57478b5f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T09:50:11Z
album: Un rêve sans conséquence spéciale
  type: MusicAlbum
  date published: 1976-01-01
album: Interface
  type: MusicAlbum
  date published: 1977-01-01
  track: Les soucoupes volantes vertes
    type: MusicRecording
    duration: PT2M28S
    duration ms: 148466
    explicit: false
    by artist: Heldon
    in album: Interface
      type: MusicAlbum
      date published: 1977-01-01
    genre: krautrock
    genre: progressive rock
    genre: space rock
    isrc code: DELI51802429
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
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    additional property: CopyrightChainExplorerURL
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    additional property: OTSHash
    additional property: OTSBitcoinBlock
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    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958711
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELI51802429
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T09:26:32Z
    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9532cf211a07e38e5de6b858cc1ea4a49d72d20f0cfff1c60cd53462f33f10c3. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELI51802429.
      date published: 2026-07-19T09:26:32Z
    audio: Les soucoupes volantes vertes
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 118.178
      additional property: Musical Key
        type: PropertyValue
        value: 10
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.615
      additional property: Energy
        type: PropertyValue
        value: 0.96
      additional property: Speechiness
        type: PropertyValue
        value: 0.065
      additional property: Acousticness
        type: PropertyValue
        value: 0.044
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.946
      additional property: Liveness
        type: PropertyValue
        value: 0.078
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.17
      additional property: Loudness (dB)
        type: PropertyValue
        value: -9.616
      additional property: Key Name
        type: PropertyValue
        value: Bb
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Stand By
  type: MusicAlbum
  date published: 1979-01-01
album: Allez-Teia (Heldon II)
  type: MusicAlbum
  date published: 2018-04-06
album: Electronique Guerilla (Heldon I)
  type: MusicAlbum
  date published: 2018-04-06
album: Allez-Teia (Heldon II)
  type: MusicAlbum
  date published: 2018-04-06
album: Electronique Guerilla (Heldon I)
  type: MusicAlbum
  date published: 2018-04-06
album: Agneta Nilsson (Heldon IV)
  type: MusicAlbum
  date published: 2018-06-22
album: It's Always Rock 'n' Roll (Heldon III)
  type: MusicAlbum
  date published: 2018-06-22
album: Le Plan
  type: MusicAlbum
  date published: 2024-08-02