Marcel Hensema
type: MusicGroup
description: Marcel Hensema (born 16 April 1970) is a Dutch film actor. He appeared in more than seventy films since 1993. In 2007 he won the Golden Calf for Best Actor for his role in the movie Wild Romance. Sel
popularity: 2
followers: 65
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xce81396ac083790731843d967cf3ffc27acb2bc25503cee97a394fb39de502b0
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954623
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954623
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/cb5c84a6-0685-4787-9bba-ae4a4e9624ca.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/cb5c84a6-0685-4787-9bba-ae4a4e9624ca.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/cb5c84a6-0685-4787-9bba-ae4a4e9624ca
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T23:40:06Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xce81396ac083790731843d967cf3ffc27acb2bc25503cee97a394fb39de502b0","name":"Marcel Hensema","registered_at":"2026-06-20T23:21:35Z","symbol":"NIM1746314","token_address":"0x43159d43eb7852e600c62c5a2eb5acaa7ed7373b","type":"artist","uuid":"cb5c84a6-0685-4787-9bba-ae4a4e9624ca"}
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 0xce81396ac083790731843d967cf3ffc27acb2bc25503cee97a394fb39de502b0. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb5c84a6-0685-4787-9bba-ae4a4e9624ca.json and https://artists.proofprofile.net/proofs/artist/cb5c84a6-0685-4787-9bba-ae4a4e9624ca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T23:40:06Z
  text: {"copyright_id":"0xce81396ac083790731843d967cf3ffc27acb2bc25503cee97a394fb39de502b0","name":"Marcel Hensema","registered_at":"2026-06-20T23:21:35Z","symbol":"NIM1746314","token_address":"0x43159d43eb7852e600c62c5a2eb5acaa7ed7373b","type":"artist","uuid":"cb5c84a6-0685-4787-9bba-ae4a4e9624ca"}
album: Geef Mie Nou Dien Angst
  type: MusicAlbum
  date published: 2015-01-29
  track: Geef Mie Nou Dien Angst
    type: MusicRecording
    duration: PT3M58S
    duration ms: 238861
    explicit: false
    by artist: Marcel Hensema
    in album: Geef Mie Nou Dien Angst
      type: MusicAlbum
      date published: 2015-01-29
    isrc code: USCGH1540346
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T05:05:20+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
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    additional property: OTSHash
    additional property: OTSBitcoinBlock
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      value: 958977
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958977
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGH1540346
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T06:27:23Z
    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 0xf556ce7f43c87bf99e538b07fe8517b530c8c81dd4c10032d6df5a4563c9c8b8. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/USCGH1540346.
      date published: 2026-07-21T06:27:23Z
    audio: Geef Mie Nou Dien Angst
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 70.929
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.389
      additional property: Energy
        type: PropertyValue
        value: 0.305
      additional property: Speechiness
        type: PropertyValue
        value: 0.038
      additional property: Acousticness
        type: PropertyValue
        value: 0.906
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.189
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.176
      additional property: Loudness (dB)
        type: PropertyValue
        value: -9.735
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Het Gaait Nait Over
  type: MusicAlbum
  date published: 2022-12-02