Herman van Keeken
type: MusicGroup
genre: nederpop
popularity: 19
followers: 574
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xae1c866461f15b623b080ab3f9e112ac82afd64ba30565919294858ac98b60a0
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953827
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953827
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/db424308-3d2d-4da7-aeaa-844a904fd396.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/db424308-3d2d-4da7-aeaa-844a904fd396.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/db424308-3d2d-4da7-aeaa-844a904fd396
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T19:59:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xae1c866461f15b623b080ab3f9e112ac82afd64ba30565919294858ac98b60a0","name":"Herman van Keeken","registered_at":"2026-06-15T03:41:18Z","symbol":"NIM0670850","token_address":"0x9cf0baf61baa477a63e6c20944c5d7271821b0fe","type":"artist","uuid":"db424308-3d2d-4da7-aeaa-844a904fd396"}
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 0xae1c866461f15b623b080ab3f9e112ac82afd64ba30565919294858ac98b60a0. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db424308-3d2d-4da7-aeaa-844a904fd396.json and https://artists.proofprofile.net/proofs/artist/db424308-3d2d-4da7-aeaa-844a904fd396.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T19:59:56Z
  text: {"copyright_id":"0xae1c866461f15b623b080ab3f9e112ac82afd64ba30565919294858ac98b60a0","name":"Herman van Keeken","registered_at":"2026-06-15T03:41:18Z","symbol":"NIM0670850","token_address":"0x9cf0baf61baa477a63e6c20944c5d7271821b0fe","type":"artist","uuid":"db424308-3d2d-4da7-aeaa-844a904fd396"}
album: Pappie Loop Toch Niet Zo Snel
  type: MusicAlbum
  date published: 1972-02-15
  track: Corinna, Corinna
    type: MusicRecording
    duration: PT2M41S
    duration ms: 161013
    explicit: false
    by artist: Herman van Keeken
    in album: Pappie Loop Toch Niet Zo Snel
      type: MusicAlbum
      date published: 1972-02-15
    genre: nederpop
    isrc code: NLC286100001
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T18:11:52+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xe5f9c57e46bd47b379ede180fefa23a0b54efd59f259c463cfea8eb3a2deb922
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958770
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958770
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLC286100001
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T21:08:20Z
    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 0xe5f9c57e46bd47b379ede180fefa23a0b54efd59f259c463cfea8eb3a2deb922. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:08:20Z), 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/NLC286100001.
      date published: 2026-07-19T21:08:20Z
    audio: Corinna, Corinna
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 130.024
      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.462
      additional property: Energy
        type: PropertyValue
        value: 0.324
      additional property: Speechiness
        type: PropertyValue
        value: 0.032
      additional property: Acousticness
        type: PropertyValue
        value: 0.664
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.385
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.789
      additional property: Loudness (dB)
        type: PropertyValue
        value: -14.749
      additional property: Key Name
        type: PropertyValue
        value: B
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Kus Me
  type: MusicAlbum
  date published: 1972-08-07
album: Buenos Dias Señorita (2024 Remix)
  type: MusicAlbum
  date published: 2024-10-18