Martijn Lakemeier
type: MusicGroup
description: Martijn Lakemeier (born 17 September 1993 in Zwijndrecht) is a Dutch actor. Career He is best known for his performance as Michiel in Winter in Wartime for which he won several awards including the G
popularity: 2
followers: 38
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3223c03a95bd498183e8daf21362e440f4056984abb5ca997360926836dc6af1
additional property: OTSHash
additional property: OTSBitcoinBlock
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  value: 954587
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954587
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bb581384-7903-4abd-ad1b-d136da97ff6f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bb581384-7903-4abd-ad1b-d136da97ff6f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/bb581384-7903-4abd-ad1b-d136da97ff6f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T19:10:41Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3223c03a95bd498183e8daf21362e440f4056984abb5ca997360926836dc6af1","name":"Martijn Lakemeier","registered_at":"2026-06-20T16:54:45Z","symbol":"NIM1659447","token_address":"0xa03fa8d35af77f0ab8e116eb9d669e4414f51d3f","type":"artist","uuid":"bb581384-7903-4abd-ad1b-d136da97ff6f"}
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 0x3223c03a95bd498183e8daf21362e440f4056984abb5ca997360926836dc6af1. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb581384-7903-4abd-ad1b-d136da97ff6f.json and https://artists.proofprofile.net/proofs/artist/bb581384-7903-4abd-ad1b-d136da97ff6f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T19:10:41Z
  text: {"copyright_id":"0x3223c03a95bd498183e8daf21362e440f4056984abb5ca997360926836dc6af1","name":"Martijn Lakemeier","registered_at":"2026-06-20T16:54:45Z","symbol":"NIM1659447","token_address":"0xa03fa8d35af77f0ab8e116eb9d669e4414f51d3f","type":"artist","uuid":"bb581384-7903-4abd-ad1b-d136da97ff6f"}
album: Eva (Titelsong Lover of Loser)
  type: MusicAlbum
  date published: 2009-01-01
  track: Eva - Titelsong Lover of Loser
    type: MusicRecording
    duration: PT3M46S
    duration ms: 226986
    explicit: false
    by artist: Martijn Lakemeier
    in album: Eva (Titelsong Lover of Loser)
      type: MusicAlbum
      date published: 2009-01-01
    isrc code: NLUM70900560
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
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      value: https://explorer.copyrightchains.com/tx/0x6b58b95af7c1785eba72427c6546bb23763014e0cb0fef3b86e5d7925917ae5a
    additional property: OTSHash
    additional property: OTSBitcoinBlock
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    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956742
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLUM70900560
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T05:07:15Z
    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 0x6b58b95af7c1785eba72427c6546bb23763014e0cb0fef3b86e5d7925917ae5a. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/NLUM70900560.
      date published: 2026-07-05T05:07:15Z
    audio: Eva - Titelsong Lover of Loser
      type: AudioObject
      additional property: Tempo (BPM)
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      additional property: Musical Key
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      additional property: Mode (Major/Minor)
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      additional property: Time Signature
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      additional property: Danceability
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      additional property: Speechiness
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      additional property: Acousticness
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      additional property: Instrumentalness
        type: PropertyValue
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      additional property: Liveness
        type: PropertyValue
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      additional property: Valence (Positivity)
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      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.783
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major