Ans van der Zanden
type: MusicGroup
popularity: 5
followers: 14
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3fa3ee6f486078429eb70c81bc982a2aaf18f2f399a8e1ebfc27c1a4b58896ed
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954000
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954000
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3219ecd3-742d-456f-acf7-fda999732c31.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3219ecd3-742d-456f-acf7-fda999732c31.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3219ecd3-742d-456f-acf7-fda999732c31
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T20:18:46Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3fa3ee6f486078429eb70c81bc982a2aaf18f2f399a8e1ebfc27c1a4b58896ed","name":"Ans van der Zanden","registered_at":"2026-06-16T06:57:07Z","symbol":"NIM0972992","token_address":"0x60ac18c4ed9b3d8bdb289a825cbf2319ca8ffe5f","type":"artist","uuid":"3219ecd3-742d-456f-acf7-fda999732c31"}
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 0x3fa3ee6f486078429eb70c81bc982a2aaf18f2f399a8e1ebfc27c1a4b58896ed. Chain 2 (Bitcoin): anchored in block 954000 (2026-06-16T20:18:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3219ecd3-742d-456f-acf7-fda999732c31.json and https://artists.proofprofile.net/proofs/artist/3219ecd3-742d-456f-acf7-fda999732c31.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:18:46Z
  text: {"copyright_id":"0x3fa3ee6f486078429eb70c81bc982a2aaf18f2f399a8e1ebfc27c1a4b58896ed","name":"Ans van der Zanden","registered_at":"2026-06-16T06:57:07Z","symbol":"NIM0972992","token_address":"0x60ac18c4ed9b3d8bdb289a825cbf2319ca8ffe5f","type":"artist","uuid":"3219ecd3-742d-456f-acf7-fda999732c31"}
album: Autumn Leaf
  type: MusicAlbum
  date published: 2024-10-23
  track: Autumn Leaf
    type: MusicRecording
    duration: PT1M51S
    duration ms: 111000
    explicit: false
    by artist: Ans van der Zanden
    in album: Autumn Leaf
      type: MusicAlbum
      date published: 2024-10-23
    isrc code: QT2VB2460352
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-02T21:51:34+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xadd2366a7f7ee92b94ee63830f2c37a72b91775b6d3d2e5c14eb131c67cd74c2
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956420
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956420
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT2VB2460352
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T04:22:53Z
    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 0xadd2366a7f7ee92b94ee63830f2c37a72b91775b6d3d2e5c14eb131c67cd74c2. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:22:53Z), 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/QT2VB2460352.
      date published: 2026-07-17T04:22:53Z
    audio: Autumn Leaf
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 111.975
      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: 0.754
      additional property: Energy
        type: PropertyValue
        value: 0.078
      additional property: Speechiness
        type: PropertyValue
        value: 0.078
      additional property: Acousticness
        type: PropertyValue
        value: 0.995
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.959
      additional property: Liveness
        type: PropertyValue
        value: 0.12
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.56
      additional property: Loudness (dB)
        type: PropertyValue
        value: -21.897
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major