Johan de Leeuw
type: MusicGroup
popularity: 3
followers: 7
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1fbb1fe8674d08d42de62dff2bd9a76b98d9b110b59878cef905600dd7cd117b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953970
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953970
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2a7cb949-9880-4cb7-9427-22d472fc92dc.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2a7cb949-9880-4cb7-9427-22d472fc92dc.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2a7cb949-9880-4cb7-9427-22d472fc92dc
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T16:09:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1fbb1fe8674d08d42de62dff2bd9a76b98d9b110b59878cef905600dd7cd117b","name":"Johan de Leeuw","registered_at":"2026-06-16T04:17:57Z","symbol":"NIM0934975","token_address":"0xc0e762b75cbe75b5b0600c37d8d5512fdae771bc","type":"artist","uuid":"2a7cb949-9880-4cb7-9427-22d472fc92dc"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbb1fe8674d08d42de62dff2bd9a76b98d9b110b59878cef905600dd7cd117b. Chain 2 (Bitcoin): anchored in block 953970 (2026-06-16T16:09:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a7cb949-9880-4cb7-9427-22d472fc92dc.json and https://artists.proofprofile.net/proofs/artist/2a7cb949-9880-4cb7-9427-22d472fc92dc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T16:09:39Z
  text: {"copyright_id":"0x1fbb1fe8674d08d42de62dff2bd9a76b98d9b110b59878cef905600dd7cd117b","name":"Johan de Leeuw","registered_at":"2026-06-16T04:17:57Z","symbol":"NIM0934975","token_address":"0xc0e762b75cbe75b5b0600c37d8d5512fdae771bc","type":"artist","uuid":"2a7cb949-9880-4cb7-9427-22d472fc92dc"}
album: Something New
  type: MusicAlbum
  date published: 2024-01-05
album: Hide
  type: MusicAlbum
  date published: 2024-07-05
album: Another Night
  type: MusicAlbum
  date published: 2024-10-18
album: Another Night
  type: MusicAlbum
  date published: 2024-10-18
album: Boom Boom Boom
  type: MusicAlbum
  date published: 2025-01-31
album: Boom Boom Boom
  type: MusicAlbum
  date published: 2025-01-31
  track: Boom Boom Boom
    type: MusicRecording
    duration: PT2M25S
    duration ms: 145548
    explicit: false
    by artist: Johan de Leeuw
    in album: Boom Boom Boom
      type: MusicAlbum
      date published: 2025-01-31
    isrc code: DET191512336
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T16:27:48+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x75e05a5ad4ca6e5a9a3a2d95e587db8ad8fd71f51d7916e53230b782b3b49b9b
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956826
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956826
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DET191512336
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T19:27:56Z
    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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e05a5ad4ca6e5a9a3a2d95e587db8ad8fd71f51d7916e53230b782b3b49b9b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DET191512336.
      date published: 2026-07-05T19:27:56Z
    audio: Boom Boom Boom
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 155.008
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.459
      additional property: Energy
        type: PropertyValue
        value: 0.966
      additional property: Speechiness
        type: PropertyValue
        value: 0.072
      additional property: Acousticness
        type: PropertyValue
        value: 0.001
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.079
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.16
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.986
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Peru
  type: MusicAlbum
  date published: 2025-05-02