Rowwen Heze & Nynke Laverman
type: MusicGroup
genre: fado
genre: nederpop
popularity: 4
followers: 229
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0a640c2ee5073242cef2ecf5cb9da583120efd0bc5d2be1d7ecc3be8b3ee64cc
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
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/8ae23ef9-d1b8-419f-ae84-d49d2264b914.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8ae23ef9-d1b8-419f-ae84-d49d2264b914.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/8ae23ef9-d1b8-419f-ae84-d49d2264b914
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x0a640c2ee5073242cef2ecf5cb9da583120efd0bc5d2be1d7ecc3be8b3ee64cc","name":"Rowwen Heze & Nynke Laverman","registered_at":"2026-06-17T14:08:40Z","symbol":"NIM1419410","token_address":"0x63d2f2099d28bace3955c5a7ecdf6a6ae3d4951e","type":"artist","uuid":"8ae23ef9-d1b8-419f-ae84-d49d2264b914"}
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 0x0a640c2ee5073242cef2ecf5cb9da583120efd0bc5d2be1d7ecc3be8b3ee64cc. 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/8ae23ef9-d1b8-419f-ae84-d49d2264b914.json and https://artists.proofprofile.net/proofs/artist/8ae23ef9-d1b8-419f-ae84-d49d2264b914.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0x0a640c2ee5073242cef2ecf5cb9da583120efd0bc5d2be1d7ecc3be8b3ee64cc","name":"Rowwen Heze & Nynke Laverman","registered_at":"2026-06-17T14:08:40Z","symbol":"NIM1419410","token_address":"0x63d2f2099d28bace3955c5a7ecdf6a6ae3d4951e","type":"artist","uuid":"8ae23ef9-d1b8-419f-ae84-d49d2264b914"}
album: Droemvlucht
  type: MusicAlbum
  date published: 2007-04-13
  track: Droemvlucht - Singleversie
    type: MusicRecording
    duration: PT4M16S
    duration ms: 256506
    explicit: false
    by artist: Rowwen Heze & Nynke Laverman
    in album: Droemvlucht
      type: MusicAlbum
      date published: 2007-04-13
    genre: fado
    genre: nederpop
    isrc code: NLY010700005
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T06:55:16+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x9f51bc550f5305b5cb5e339c98ba493e1d37562ec4a6e1ff46c40bc5a3bb6df6
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958380
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958380
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY010700005
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T07:07:02Z
    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 0x9f51bc550f5305b5cb5e339c98ba493e1d37562ec4a6e1ff46c40bc5a3bb6df6. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/NLY010700005.
      date published: 2026-07-17T07:07:02Z
    audio: Droemvlucht - Singleversie
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 72.855
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.241
      additional property: Energy
        type: PropertyValue
        value: 0.289
      additional property: Speechiness
        type: PropertyValue
        value: 0.031
      additional property: Acousticness
        type: PropertyValue
        value: 0.845
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.155
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.172
      additional property: Loudness (dB)
        type: PropertyValue
        value: -9.471
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Major