Joe Kaptein
type: MusicGroup
genre: jazz funk
popularity: 7
followers: 378
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0xd46c1486b7744965c04a910273737e22e9a69dbaede2e4b76126e07bc326d763
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954513
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954513
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9d7a7c06-06e1-49fd-b59d-0392226e4a5a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9d7a7c06-06e1-49fd-b59d-0392226e4a5a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9d7a7c06-06e1-49fd-b59d-0392226e4a5a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T06:31:18Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd46c1486b7744965c04a910273737e22e9a69dbaede2e4b76126e07bc326d763","name":"Joe Kaptein","registered_at":"2026-06-20T04:34:06Z","symbol":"NIM1513359","token_address":"0x8b899d3470c215845593024771148953f08ba997","type":"artist","uuid":"9d7a7c06-06e1-49fd-b59d-0392226e4a5a"}
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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46c1486b7744965c04a910273737e22e9a69dbaede2e4b76126e07bc326d763. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d7a7c06-06e1-49fd-b59d-0392226e4a5a.json and https://artists.proofprofile.net/proofs/artist/9d7a7c06-06e1-49fd-b59d-0392226e4a5a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T06:31:18Z
  text: {"copyright_id":"0xd46c1486b7744965c04a910273737e22e9a69dbaede2e4b76126e07bc326d763","name":"Joe Kaptein","registered_at":"2026-06-20T04:34:06Z","symbol":"NIM1513359","token_address":"0x8b899d3470c215845593024771148953f08ba997","type":"artist","uuid":"9d7a7c06-06e1-49fd-b59d-0392226e4a5a"}
album: Japanese Pool Masters
  type: MusicAlbum
  date published: 2021-06-03
album: Japanese Pool Masters
  type: MusicAlbum
  date published: 2021-06-03
album: Japanese Pool Masters
  type: MusicAlbum
  date published: 2021-06-03
album: Spring Green
  type: MusicAlbum
  date published: 2021-12-22
album: Spring Green
  type: MusicAlbum
  date published: 2021-12-23
album: Spring Green
  type: MusicAlbum
  date published: 2021-12-23
album: Spring Green
  type: MusicAlbum
  date published: 2021-12-23
album: Spaced Further Out
  type: MusicAlbum
  date published: 2023-06-04
album: Nu Zild Songbook Vol. 1
  type: MusicAlbum
  date published: 2023-06-04
album: Nu Zild Songbook Vol. 1
  type: MusicAlbum
  date published: 2023-06-04
album: Spaced Further Out EP
  type: MusicAlbum
  date published: 2023-07-16
album: Good Weather for the Ducks
  type: MusicAlbum
  date published: 2023-11-24
album: Good Weather
  type: MusicAlbum
  date published: 2023-12-01
album: Good Weather
  type: MusicAlbum
  date published: 2023-12-01
album: Are You There (with Another Girl)
  type: MusicAlbum
  date published: 2024-05-12
album: Ode To Burt
  type: MusicAlbum
  date published: 2024-05-31
album: Ode to Burt
  type: MusicAlbum
  date published: 2024-05-31
album: Unwavering
  type: MusicAlbum
  date published: 2024-06-14
album: Unwavering
  type: MusicAlbum
  date published: 2024-06-14
album: Eternal Afternoon
  type: MusicAlbum
  date published: 2024-07-12
album: Eternal Afternoon
  type: MusicAlbum
  date published: 2024-07-12
album: Sleepy Space Cadet
  type: MusicAlbum
  date published: 2025-09-01
album: Five Stone Sourdough
  type: MusicAlbum
  date published: 2025-09-19
album: Pool Sharks
  type: MusicAlbum
  date published: 2025-10-03
  track: Five Stone Sourdough
    type: MusicRecording
    duration: PT4M28S
    duration ms: 268919
    explicit: false
    by artist: Joe Kaptein
    in album: Pool Sharks
      type: MusicAlbum
      date published: 2025-10-03
    genre: jazz funk
    isrc code: QMFME2506981
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
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    additional property: CopyrightChainExplorerURL
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    additional property: OTSBitcoinBlock
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    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958827
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2506981
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T07:58:40Z
    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 0x14420ef65c40c55ca2e91e23e7000627fa272e406f253cf41718840b392ebad6. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:58:40Z), 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/QMFME2506981.
      date published: 2026-07-20T07:58:40Z
    audio: Five Stone Sourdough
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 116.839
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.485
      additional property: Energy
        type: PropertyValue
        value: 0.455
      additional property: Speechiness
        type: PropertyValue
        value: 0.031
      additional property: Acousticness
        type: PropertyValue
        value: 0.092
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.42
      additional property: Liveness
        type: PropertyValue
        value: 0.112
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.218
      additional property: Loudness (dB)
        type: PropertyValue
        value: -9.207
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Major