Bart Heemskerk
type: MusicGroup
popularity: 10
followers: 433
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x98f0861f26d5808498764a4cb9683837418b6e21cf568b5caf98805a6efe7ba2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b983a978-4fa7-467d-a59e-e4cacb63b5df.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b983a978-4fa7-467d-a59e-e4cacb63b5df.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b983a978-4fa7-467d-a59e-e4cacb63b5df
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x98f0861f26d5808498764a4cb9683837418b6e21cf568b5caf98805a6efe7ba2","name":"Bart Heemskerk","registered_at":"2026-06-20T16:46:47Z","symbol":"NIM1656606","token_address":"0x7627c36e07489cbc8ff07cfc396958c34a6476aa","type":"artist","uuid":"b983a978-4fa7-467d-a59e-e4cacb63b5df"}
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 0x98f0861f26d5808498764a4cb9683837418b6e21cf568b5caf98805a6efe7ba2. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b983a978-4fa7-467d-a59e-e4cacb63b5df.json and https://artists.proofprofile.net/proofs/artist/b983a978-4fa7-467d-a59e-e4cacb63b5df.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0x98f0861f26d5808498764a4cb9683837418b6e21cf568b5caf98805a6efe7ba2","name":"Bart Heemskerk","registered_at":"2026-06-20T16:46:47Z","symbol":"NIM1656606","token_address":"0x7627c36e07489cbc8ff07cfc396958c34a6476aa","type":"artist","uuid":"b983a978-4fa7-467d-a59e-e4cacb63b5df"}
album: Trots Op Jou
  type: MusicAlbum
  date published: 2019-04-01
album: Geef Mij Jouw Liefde
  type: MusicAlbum
  date published: 2019-05-24
album: Vertrouw Me
  type: MusicAlbum
  date published: 2019-11-27
album: Mijn Allessie
  type: MusicAlbum
  date published: 2020-06-01
  track: Mijn Allessie
    type: MusicRecording
    duration: PT3M37S
    duration ms: 217899
    explicit: false
    by artist: Bart Heemskerk
    in album: Mijn Allessie
      type: MusicAlbum
      date published: 2020-06-01
    isrc code: NLA5F2000001
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-06T00:17:27+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xd7ebaecdc0565180d81a199c2aca82a332a71cd98f29af453434353a8c3bb190
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956857
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956857
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA5F2000001
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T01:26:17Z
    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 0xd7ebaecdc0565180d81a199c2aca82a332a71cd98f29af453434353a8c3bb190. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NLA5F2000001.
      date published: 2026-07-06T01:26:17Z
    audio: Mijn Allessie
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 97.982
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.787
      additional property: Energy
        type: PropertyValue
        value: 0.9
      additional property: Speechiness
        type: PropertyValue
        value: 0.129
      additional property: Acousticness
        type: PropertyValue
        value: 0.123
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.156
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.886
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.103
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Jij
  type: MusicAlbum
  date published: 2020-10-21
album: X-Mas Songs
  type: MusicAlbum
  date published: 2020-12-08
album: Back in Time
  type: MusicAlbum
  date published: 2020-12-10
album: Hartendief
  type: MusicAlbum
  date published: 2021-06-16
album: Ze zei hallo
  type: MusicAlbum
  date published: 2022-03-09
album: Leven zonder jou
  type: MusicAlbum
  date published: 2022-11-09
album: Ik kan het niet alleen
  type: MusicAlbum
  date published: 2023-05-10
album: Baby Come Back
  type: MusicAlbum
  date published: 2024-06-21
album: De zomer is van jou en mij
  type: MusicAlbum
  date published: 2025-06-25
album: Een beetje meer 2.0
  type: MusicAlbum
  date published: 2025-09-17