Willem Claesen
type: MusicGroup
genre: neoclassical
popularity: 8
followers: 146
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa5321f7f5d3ac87c0eef0dbb6bd1f5e45a9031dd5e0eeb0562c84c445c391f66
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954050
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954050
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/42b27bb2-4d92-4fcf-b164-50abf88975f9.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/42b27bb2-4d92-4fcf-b164-50abf88975f9.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/42b27bb2-4d92-4fcf-b164-50abf88975f9
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T05:14:33Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa5321f7f5d3ac87c0eef0dbb6bd1f5e45a9031dd5e0eeb0562c84c445c391f66","name":"Willem Claesen","registered_at":"2026-06-16T12:49:41Z","symbol":"NIM1057125","token_address":"0x0c57dc937a56e9d1c931aa2d592769502f5f3729","type":"artist","uuid":"42b27bb2-4d92-4fcf-b164-50abf88975f9"}
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 0xa5321f7f5d3ac87c0eef0dbb6bd1f5e45a9031dd5e0eeb0562c84c445c391f66. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42b27bb2-4d92-4fcf-b164-50abf88975f9.json and https://artists.proofprofile.net/proofs/artist/42b27bb2-4d92-4fcf-b164-50abf88975f9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0xa5321f7f5d3ac87c0eef0dbb6bd1f5e45a9031dd5e0eeb0562c84c445c391f66","name":"Willem Claesen","registered_at":"2026-06-16T12:49:41Z","symbol":"NIM1057125","token_address":"0x0c57dc937a56e9d1c931aa2d592769502f5f3729","type":"artist","uuid":"42b27bb2-4d92-4fcf-b164-50abf88975f9"}
album: Cloudburst
  type: MusicAlbum
  date published: 2022-11-11
album: Hoot
  type: MusicAlbum
  date published: 2022-12-02
album: Behemoth
  type: MusicAlbum
  date published: 2023-01-06
album: Paulien
  type: MusicAlbum
  date published: 2023-02-03
album: Elfin
  type: MusicAlbum
  date published: 2023-03-10
album: Wind
  type: MusicAlbum
  date published: 2023-04-07
album: Fey
  type: MusicAlbum
  date published: 2023-05-19
album: Creek
  type: MusicAlbum
  date published: 2023-06-30
album: Arcane
  type: MusicAlbum
  date published: 2023-08-25
album: Trinity
  type: MusicAlbum
  date published: 2023-10-06
album: Birch
  type: MusicAlbum
  date published: 2023-12-08
album: Jingle Bells
  type: MusicAlbum
  date published: 2023-12-18
album: Purpose
  type: MusicAlbum
  date published: 2024-02-16
album: Whisper
  type: MusicAlbum
  date published: 2024-04-05
album: Sunset Waltz
  type: MusicAlbum
  date published: 2024-04-26
album: Recluse
  type: MusicAlbum
  date published: 2024-05-24
  track: Recluse
    type: MusicRecording
    duration: PT3M18S
    duration ms: 198805
    explicit: false
    by artist: Willem Claesen
    in album: Recluse
      type: MusicAlbum
      date published: 2024-05-24
    genre: neoclassical
    isrc code: GX8LD2410994
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T14:15:19+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x6657bdcb1e62bf53b0c4aae68fc04486b12dcd59e2e0cb94b8f6f5efc6412978
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958746
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958746
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX8LD2410994
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T15:36:35Z
    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 0x6657bdcb1e62bf53b0c4aae68fc04486b12dcd59e2e0cb94b8f6f5efc6412978. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GX8LD2410994.
      date published: 2026-07-19T15:36:35Z
    audio: Recluse
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 133.963
      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: 0.537
      additional property: Energy
        type: PropertyValue
        value: 0.096
      additional property: Speechiness
        type: PropertyValue
        value: 0.034
      additional property: Acousticness
        type: PropertyValue
        value: 0.977
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.884
      additional property: Liveness
        type: PropertyValue
        value: 0.172
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.277
      additional property: Loudness (dB)
        type: PropertyValue
        value: -20.1
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Jinx
  type: MusicAlbum
  date published: 2024-07-05
album: Another Carol
  type: MusicAlbum
  date published: 2024-12-09
album: Flake
  type: MusicAlbum
  date published: 2025-01-03
album: Leaf
  type: MusicAlbum
  date published: 2025-07-11