Boertjes Van Buuten
type: MusicGroup
genre: polka
popularity: 8
followers: 613
additional property: CopyrightID
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/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/844a2247-7867-45e2-9c87-979973dc6e30.ots
additional property: OTSRecordURL
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  value: https://artists.proofprofile.net/proofs/artist/844a2247-7867-45e2-9c87-979973dc6e30.json
additional property: OTSVerificationAPI
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  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/844a2247-7867-45e2-9c87-979973dc6e30
additional property: OTSTimestamp
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additional property: OTSCanonicalRecord
  type: PropertyValue
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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 0xa9e9dcba1205634ea08f23a26b8ec96d570910fcb91cd92e906e30d582cd95bf. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/844a2247-7867-45e2-9c87-979973dc6e30.json and https://artists.proofprofile.net/proofs/artist/844a2247-7867-45e2-9c87-979973dc6e30.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0xa9e9dcba1205634ea08f23a26b8ec96d570910fcb91cd92e906e30d582cd95bf","name":"Boertjes Van Buuten","registered_at":"2026-06-17T11:48:56Z","symbol":"NIM1386155","token_address":"0x4f96a5b2bb4ddb1a28c2ef8d4a7df90775e41dd4","type":"artist","uuid":"844a2247-7867-45e2-9c87-979973dc6e30"}
album: Johnny Hoes presenteert: Boerenhutspot
  type: MusicAlbum
  date published: 1964-02-05
album: Boertjes Beste
  type: MusicAlbum
  date published: 1965-02-13
album: De Bromsnorpolka / De Kakelwals
  type: MusicAlbum
  date published: 1965-12-16
album: Het Is Maar Eén Keer Carnaval / De Tapkast Wals
  type: MusicAlbum
  date published: 1966-05-20
album: Aambeeld Polka / Brandweer Polka
  type: MusicAlbum
  date published: 1966-05-20
album: Kakel Wals
  type: MusicAlbum
  date published: 1967
album: Lieve Frans / Bie Mien Op De Boerderie
  type: MusicAlbum
  date published: 1967-01-13
album: Jakob / Theodorus
  type: MusicAlbum
  date published: 1968-01-30
album: Hollandse Polka / Toch Bint Wie Gek Op Mekaar
  type: MusicAlbum
  date published: 1968-02-18
album: Drika, Ik Moet Je Wat Vragen / Bruiloft In Volendam
  type: MusicAlbum
  date published: 1969-02-13
album: Telstar Dubbel Goud, Vol. 25
  type: MusicAlbum
  date published: 1976-12-10
album: Hollands Glorie
  type: MusicAlbum
  date published: 2002
album: De Regenboog Serie: 24 X Mik - De Boertjes Van Buuten
  type: MusicAlbum
  date published: 2008-06-20
  track: Aambeeldpolka
    type: MusicRecording
    duration: PT1M50S
    duration ms: 110333
    explicit: false
    by artist: Boertjes Van Buuten
    in album: De Regenboog Serie: 24 X Mik - De Boertjes Van Buuten
      type: MusicAlbum
      date published: 2008-06-20
    genre: polka
    isrc code: NLAX70928236
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T20:25:24+00:00
    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/958931
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLAX70928236
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T21:15:01Z
    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 0x8fa2f033a2a5d2b541b6151a822dcbd925b6f03aa023a132c5fcd5394ff2c820. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NLAX70928236.
      date published: 2026-07-20T21:15:01Z
    audio: Aambeeldpolka
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 108.166
      additional property: Musical Key
        type: PropertyValue
        value: 10
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.858
      additional property: Energy
        type: PropertyValue
        value: 0.785
      additional property: Speechiness
        type: PropertyValue
        value: 0.055
      additional property: Acousticness
        type: PropertyValue
        value: 0.315
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.189
      additional property: Liveness
        type: PropertyValue
        value: 0.067
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.518
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.084
      additional property: Key Name
        type: PropertyValue
        value: Bb
      additional property: Mode Name
        type: PropertyValue
        value: Major