Jef Verheijde
type: MusicGroup
popularity: 9
followers: 389
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7c939ce535e696443af1d9dc7951311ba155a8174c15860946fb020403cd4e23
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953984
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953984
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2d3246da-e187-47ef-b272-bc618edf9d65.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2d3246da-e187-47ef-b272-bc618edf9d65.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2d3246da-e187-47ef-b272-bc618edf9d65
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T18:08:34Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x7c939ce535e696443af1d9dc7951311ba155a8174c15860946fb020403cd4e23","name":"Jef Verheijde","registered_at":"2026-06-16T05:24:00Z","symbol":"NIM0950757","token_address":"0x5fd7f51db76a5e592eb370bb174ca019e22cb3f1","type":"artist","uuid":"2d3246da-e187-47ef-b272-bc618edf9d65"}
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 0x7c939ce535e696443af1d9dc7951311ba155a8174c15860946fb020403cd4e23. Chain 2 (Bitcoin): anchored in block 953984 (2026-06-16T18:08:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d3246da-e187-47ef-b272-bc618edf9d65.json and https://artists.proofprofile.net/proofs/artist/2d3246da-e187-47ef-b272-bc618edf9d65.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T18:08:34Z
  text: {"copyright_id":"0x7c939ce535e696443af1d9dc7951311ba155a8174c15860946fb020403cd4e23","name":"Jef Verheijde","registered_at":"2026-06-16T05:24:00Z","symbol":"NIM0950757","token_address":"0x5fd7f51db76a5e592eb370bb174ca019e22cb3f1","type":"artist","uuid":"2d3246da-e187-47ef-b272-bc618edf9d65"}
album: Links, Rechts, Väör, Trök
  type: MusicAlbum
  date published: 2014-02-11
album: Tanze mit mir...
  type: MusicAlbum
  date published: 2014-05-06
album: Tanze mit mir...
  type: MusicAlbum
  date published: 2014-05-06
album: Spiel noch einmal für mich...
  type: MusicAlbum
  date published: 2014-05-16
  track: Schön ist die Jugend
    type: MusicRecording
    duration: PT3M20S
    duration ms: 200855
    explicit: false
    by artist: Jef Verheijde
    in album: Spiel noch einmal für mich...
      type: MusicAlbum
      date published: 2014-05-16
    isrc code: NLG930500174
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-22T07:30:25+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xa1db8b5f0b3ed6772780b05499e2510652fb6aea52839dc68dd6f19eadd51d84
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959114
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959114
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG930500174
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-22T08:41:42Z
    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 0xa1db8b5f0b3ed6772780b05499e2510652fb6aea52839dc68dd6f19eadd51d84. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/NLG930500174.
      date published: 2026-07-22T08:41:42Z
    audio: Schön ist die Jugend
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 162.742
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.423
      additional property: Energy
        type: PropertyValue
        value: 0.255
      additional property: Speechiness
        type: PropertyValue
        value: 0.031
      additional property: Acousticness
        type: PropertyValue
        value: 0.65
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.113
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.578
      additional property: Loudness (dB)
        type: PropertyValue
        value: -9.956
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Spiel noch einmal für mich...
  type: MusicAlbum
  date published: 2014-05-16
album: Verstand en hart
  type: MusicAlbum
  date published: 2014-06-30
album: YOUR TIME IS GOING TO COME
  type: MusicAlbum
  date published: 2019-09-09
album: Hei is 't te doen!
  type: MusicAlbum
  date published: 2023-07-08
album: Kom plök d'n daag
  type: MusicAlbum
  date published: 2024-01-19
album: Seemann, deine Heimat ist das Meer
  type: MusicAlbum
  date published: 2024-07-04
album: Leef simpel
  type: MusicAlbum
  date published: 2024-10-09
album: Veer goon beginne!
  type: MusicAlbum
  date published: 2025-02-10
album: Dee wien vaan Samos
  type: MusicAlbum
  date published: 2025-08-20