Jan Spijkerman
type: MusicGroup
popularity: 4
followers: 428
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc0c0f8e2f59d4a51d32f27820f403c698d2e9d984e935134a60e3519bf59b61c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954593
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954593
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bda6343a-2682-4a10-a5a1-18aa6e83d96c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bda6343a-2682-4a10-a5a1-18aa6e83d96c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/bda6343a-2682-4a10-a5a1-18aa6e83d96c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T19:46:01Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc0c0f8e2f59d4a51d32f27820f403c698d2e9d984e935134a60e3519bf59b61c","name":"Jan Spijkerman","registered_at":"2026-06-20T18:06:08Z","symbol":"NIM1674182","token_address":"0xb7803b5942444c3d6ea2f5cd39c7bb653e1dc991","type":"artist","uuid":"bda6343a-2682-4a10-a5a1-18aa6e83d96c"}
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 0xc0c0f8e2f59d4a51d32f27820f403c698d2e9d984e935134a60e3519bf59b61c. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bda6343a-2682-4a10-a5a1-18aa6e83d96c.json and https://artists.proofprofile.net/proofs/artist/bda6343a-2682-4a10-a5a1-18aa6e83d96c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T19:46:01Z
  text: {"copyright_id":"0xc0c0f8e2f59d4a51d32f27820f403c698d2e9d984e935134a60e3519bf59b61c","name":"Jan Spijkerman","registered_at":"2026-06-20T18:06:08Z","symbol":"NIM1674182","token_address":"0xb7803b5942444c3d6ea2f5cd39c7bb653e1dc991","type":"artist","uuid":"bda6343a-2682-4a10-a5a1-18aa6e83d96c"}
album: Stom
  type: MusicAlbum
  date published: 2009-12-28
album: Stom
  type: MusicAlbum
  date published: 2009-12-28
album: Tranen van geluk
  type: MusicAlbum
  date published: 2010-08-02
album: Tranen van geluk
  type: MusicAlbum
  date published: 2010-08-02
  track: Stom
    type: MusicRecording
    duration: PT3M29S
    duration ms: 209000
    explicit: false
    by artist: Jan Spijkerman
    in album: Tranen van geluk
      type: MusicAlbum
      date published: 2010-08-02
    isrc code: NLL530900473
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T08:27:26+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xab22f3a6b072aafc3101ea0960dc8c6bd70e054d2f1ce18215e503a621200b82
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958988
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958988
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLL530900473
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T11:30:15Z
    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 0xab22f3a6b072aafc3101ea0960dc8c6bd70e054d2f1ce18215e503a621200b82. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T11:30:15Z), 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/NLL530900473.
      date published: 2026-07-21T11:30:15Z
    audio: Stom
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 139.469
      additional property: Musical Key
        type: PropertyValue
        value: 10
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.524
      additional property: Energy
        type: PropertyValue
        value: 0.741
      additional property: Speechiness
        type: PropertyValue
        value: 0.026
      additional property: Acousticness
        type: PropertyValue
        value: 0.007
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.343
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.735
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.838
      additional property: Key Name
        type: PropertyValue
        value: Bb
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Zelfs jouw tranen die liegen
  type: MusicAlbum
  date published: 2010-10-08
album: Zelfs jouw tranen die liegen
  type: MusicAlbum
  date published: 2010-10-08
album: Jij bent de zin van mijn bestaan
  type: MusicAlbum
  date published: 2013-02-22
album: Jij bent de zin van mijn bestaan
  type: MusicAlbum
  date published: 2013-02-22
album: Achter de wolken ligt thuis
  type: MusicAlbum
  date published: 2014-01-06
album: Achter de wolken ligt thuis
  type: MusicAlbum
  date published: 2014-01-06