Leen Zijlmans
type: MusicGroup
popularity: 33
followers: 2593
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x56dd9c054ca0bb18d5af90559fa8dd586fc2650425f992604336685d00d96f4c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953423
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/953423
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/be98e7b9-1e8b-4381-b138-f2b0926b7d64.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/be98e7b9-1e8b-4381-b138-f2b0926b7d64.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/be98e7b9-1e8b-4381-b138-f2b0926b7d64
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T21:20:00Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x56dd9c054ca0bb18d5af90559fa8dd586fc2650425f992604336685d00d96f4c","name":"Leen Zijlmans","registered_at":"2026-06-12T08:46:20Z","symbol":"NIM0246422","token_address":"0x55aff5cb057ccb7b1480065488414adbc5f2bfdd","type":"artist","uuid":"be98e7b9-1e8b-4381-b138-f2b0926b7d64"}
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 → block must exist at that height 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 0x56dd9c054ca0bb18d5af90559fa8dd586fc2650425f992604336685d00d96f4c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be98e7b9-1e8b-4381-b138-f2b0926b7d64.json and https://artists.proofprofile.net/proofs/artist/be98e7b9-1e8b-4381-b138-f2b0926b7d64.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T21:20:00Z
  text: {"copyright_id":"0x56dd9c054ca0bb18d5af90559fa8dd586fc2650425f992604336685d00d96f4c","name":"Leen Zijlmans","registered_at":"2026-06-12T08:46:20Z","symbol":"NIM0246422","token_address":"0x55aff5cb057ccb7b1480065488414adbc5f2bfdd","type":"artist","uuid":"be98e7b9-1e8b-4381-b138-f2b0926b7d64"}
album: Moments To Remember
  type: MusicAlbum
  date published: 2000-11-03
album: Ik Kan Niet Zeggen Wat Ik Voel
  type: MusicAlbum
  date published: 2004-08-04
album: Stralend Door Het Leven
  type: MusicAlbum
  date published: 2005
album: Stralend Door Het Leven
  type: MusicAlbum
  date published: 2005
album: Pluk De Dag Met Leen
  type: MusicAlbum
  date published: 2007-01-25
album: Mijn Herinneringen
  type: MusicAlbum
  date published: 2008-05-05
album: ik kan niet zeggen wat ik voel
  type: MusicAlbum
  date published: 2008-05-05
album: pluk de dag met...
  type: MusicAlbum
  date published: 2008-05-05
album: blijf wie je bent
  type: MusicAlbum
  date published: 2008-05-05
album: Mijn Herinneringen
  type: MusicAlbum
  date published: 2008-05-05
  track: Kleine Dingen In Het Leven
    type: MusicRecording
    duration: PT3M12S
    duration ms: 192346
    explicit: false
    by artist: Leen Zijlmans
    in album: Mijn Herinneringen
      type: MusicAlbum
      date published: 2008-05-05
    isrc code: NLX091904033
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-12T02:50:01+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x941a3317f38180dcbbcf59a9c646e2fdbcb83003b94d7baa2b08bf52195c68ef
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 957644
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block/957644
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091904033
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-12T03:18:52Z
    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 → block OTSBitcoinBlock must exist at that height 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 0x941a3317f38180dcbbcf59a9c646e2fdbcb83003b94d7baa2b08bf52195c68ef. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/NLX091904033.
      date published: 2026-07-12T03:18:52Z
    audio: Kleine Dingen In Het Leven
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 114.984
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.697
      additional property: Energy
        type: PropertyValue
        value: 0.828
      additional property: Speechiness
        type: PropertyValue
        value: 0.04
      additional property: Acousticness
        type: PropertyValue
        value: 0.401
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.338
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.651
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.418
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Major
  track: Geen Man Kan Zonder Liefde
    type: MusicRecording
    duration: PT3M40S
    duration ms: 220786
    explicit: false
    by artist: Leen Zijlmans
    in album: Mijn Herinneringen
      type: MusicAlbum
      date published: 2008-05-05
    isrc code: NLX091904034
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-14T19:48:57+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x3c83645d77196dee3abf9a9d37aa0ae1fb0f2d0d08c19519518e3466d584c8cf
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958060
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block/958060
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091904034
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-14T20:39:42Z
    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 → block OTSBitcoinBlock must exist at that height 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 0x3c83645d77196dee3abf9a9d37aa0ae1fb0f2d0d08c19519518e3466d584c8cf. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NLX091904034.
      date published: 2026-07-14T20:39:42Z
    audio: Geen Man Kan Zonder Liefde
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 196.006
      additional property: Musical Key
        type: PropertyValue
        value: 10
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
      additional property: Danceability
      additional property: Energy
      additional property: Speechiness
      additional property: Acousticness
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
  track: Paradijs In De Zee
  track: Dit Is Mijn Kroeg
  track: Mijn Oude Huis
  track: Mijn Herinneringen
  track: Waar Ben Je Toch Gebleven
  track: Ik Blijf Je Vriend
  track: Biertje
  track: Doe Wat Je Wilt
album: mijn herinneringen
album: Alleen Met Jou
album: Caballero
album: Blijf wie je bent
album: Op De Slee Naar Benee
album: Ad De Advocaat
album: De Rumba
album: Leen...komt naar je toe!
album: Wat Een Feest
album: Doe wat je wilt
album: Daar Zijn Opa's Voor
album: Blijf Wie Je Bent
album: moments to remember
album: Ik Zal Je Missen
album: Leentje Doe(t) Er Nog Eentje
album: Pluk de dag met Leen
album: Ad de Advocaat
album: Geluk Zit Vaak In Hele Kleine Dingen
album: Je Zien Huilen Kan Ik Niet
album: Jij Bent Het Leven Voor Mij
album: Jij Brengt Weer Glans in Mijn Leven
album: Als vader mag je best wel even huilen
album: Wals Medley 50 jaar Leen
album: Nog steeds
album: Wat een Feest
album: Klaar met het verleden
album: Zondagmiddag 2.0
album: Ik Hou van het Leven

Time Signature
type: PropertyValue
value: 3

Danceability
type: PropertyValue
value: 0.607

Energy
type: PropertyValue
value: 0.871

Speechiness
type: PropertyValue
value: 0.167

Acousticness
type: PropertyValue
value: 0.393

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.199

Valence (Positivity)
type: PropertyValue
value: 0.77

Loudness (dB)
type: PropertyValue
value: -5.548

Key Name
type: PropertyValue
value: Bb

Mode Name
type: PropertyValue
value: Major

Paradijs In De Zee
type: MusicRecording
duration: PT3M40S
duration ms: 220306
explicit: false
by artist: Leen Zijlmans
in album: Mijn Herinneringen
  type: MusicAlbum
  date published: 2008-05-05
isrc code: NLX091904035
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-16T05:06:45+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9376ceee7b46518fd274e986aa8560418f9500f9f89b4e68b677aa38608d6e53
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958246
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/958246
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091904035
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-16T08:05:21Z
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 → block OTSBitcoinBlock must exist at that height 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 0x9376ceee7b46518fd274e986aa8560418f9500f9f89b4e68b677aa38608d6e53. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:05:21Z), 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/NLX091904035.
  date published: 2026-07-16T08:05:21Z
audio: Paradijs In De Zee
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 131.304
  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.622
  additional property: Energy
    type: PropertyValue
    value: 0.797
  additional property: Speechiness
    type: PropertyValue
    value: 0.033
  additional property: Acousticness
    type: PropertyValue
    value: 0.093
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.204
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.777
  additional property: Loudness (dB)
    type: PropertyValue
    value: -5.418
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Major

Dit Is Mijn Kroeg
type: MusicRecording
duration: PT3M27S
duration ms: 207972
explicit: false
by artist: Leen Zijlmans
in album: Mijn Herinneringen
  type: MusicAlbum
  date published: 2008-05-05
isrc code: NLX091904036
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-03T14:27:06+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa2da71f41419084c20e7e26288b9380cda9c8fa3cc37b11f0105ffbfd02b1183
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956560
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/956560
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091904036
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-03T23:28:02Z
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 → block OTSBitcoinBlock must exist at that height 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 0xa2da71f41419084c20e7e26288b9380cda9c8fa3cc37b11f0105ffbfd02b1183. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NLX091904036.
  date published: 2026-07-03T23:28:02Z
audio: Dit Is Mijn Kroeg
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 96.009
  additional property: Musical Key
    type: PropertyValue
    value: 6
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 3
  additional property: Danceability
    type: PropertyValue
    value: 0.608
  additional property: Energy
    type: PropertyValue
    value: 0.706
  additional property: Speechiness
    type: PropertyValue
    value: 0.027
  additional property: Acousticness
    type: PropertyValue
    value: 0.285
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.923
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.564
  additional property: Loudness (dB)
    type: PropertyValue
    value: -5.388
  additional property: Key Name
    type: PropertyValue
    value: F#
  additional property: Mode Name
    type: PropertyValue
    value: Major

Mijn Oude Huis
type: MusicRecording
duration: PT3M43S
duration ms: 223452
explicit: false
by artist: Leen Zijlmans
in album: Mijn Herinneringen
  type: MusicAlbum
  date published: 2008-05-05
isrc code: NLX091904038
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-03T00:30:44+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x515ee9d9949fdcdb26fc672dccb225487f234d6e4d9106143d38e4e0bfa3fc25
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956440
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/956440
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091904038
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-03T04:03:57Z
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 → block OTSBitcoinBlock must exist at that height 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 0x515ee9d9949fdcdb26fc672dccb225487f234d6e4d9106143d38e4e0bfa3fc25. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/NLX091904038.
  date published: 2026-07-03T04:03:57Z
audio: Mijn Oude Huis
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 95.968
  additional property: Musical Key
    type: PropertyValue
    value: 6
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.628
  additional property: Energy
    type: PropertyValue
    value: 0.713
  additional property: Speechiness
    type: PropertyValue
    value: 0.043
  additional property: Acousticness
    type: PropertyValue
    value: 0.092
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.001
  additional property: Liveness
    type: PropertyValue
    value: 0.371
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.535
  additional property: Loudness (dB)
    type: PropertyValue
    value: -7.194
  additional property: Key Name
    type: PropertyValue
    value: F#
  additional property: Mode Name
    type: PropertyValue
    value: Major

Mijn Herinneringen
type: MusicRecording
duration: PT3M32S
duration ms: 212639
explicit: false
by artist: Leen Zijlmans
in album: Mijn Herinneringen
  type: MusicAlbum
  date published: 2008-05-05
isrc code: NLX091904039
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-15T06:39:08+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x78c8f215ec8762f565d8d66cc8eaaa309ee4f90759954d12033028d9a7b8221a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958110
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/958110
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091904039
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-15T09:42:05Z
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 → block OTSBitcoinBlock must exist at that height 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 0x78c8f215ec8762f565d8d66cc8eaaa309ee4f90759954d12033028d9a7b8221a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:42:05Z), 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/NLX091904039.
  date published: 2026-07-15T09:42:05Z
audio: Mijn Herinneringen
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 181.41
  additional property: Musical Key
    type: PropertyValue
    value: 10
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 3
  additional property: Danceability
    type: PropertyValue
    value: 0.428
  additional property: Energy
    type: PropertyValue
    value: 0.822
  additional property: Speechiness
    type: PropertyValue
    value: 0.073
  additional property: Acousticness
    type: PropertyValue
    value: 0.221
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.218
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.772
  additional property: Loudness (dB)
    type: PropertyValue
    value: -4.701
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Waar Ben Je Toch Gebleven
type: MusicRecording
duration: PT2M59S
duration ms: 179292
explicit: false
by artist: Leen Zijlmans
in album: Mijn Herinneringen
  type: MusicAlbum
  date published: 2008-05-05
isrc code: NLX091904040
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-16T05:31:45+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xefa8cfd5a7230453dc1f51ac820868c7cfa0f9b9e8f9e6c47ad07c4be7b48974
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958246
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/958246
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091904040
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-16T05:55:09Z
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 → block OTSBitcoinBlock must exist at that height 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 0xefa8cfd5a7230453dc1f51ac820868c7cfa0f9b9e8f9e6c47ad07c4be7b48974. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/NLX091904040.
  date published: 2026-07-16T05:55:09Z
audio: Waar Ben Je Toch Gebleven
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 126.081
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.635
  additional property: Energy
    type: PropertyValue
    value: 0.896
  additional property: Speechiness
    type: PropertyValue
    value: 0.237
  additional property: Acousticness
    type: PropertyValue
    value: 0.043
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.195
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.779
  additional property: Loudness (dB)
    type: PropertyValue
    value: -5.48
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Ik Blijf Je Vriend
type: MusicRecording
duration: PT3M43S
duration ms: 223466
explicit: false
by artist: Leen Zijlmans
in album: Mijn Herinneringen
  type: MusicAlbum
  date published: 2008-05-05
isrc code: NLX091904041
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-03T08:00:49+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb0003dc6376638e70dfeebf70c60e4888882fbac5a9b0b7b27bdbd03733f2dce
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956476
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/956476
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091904041
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-03T09:04:44Z
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 → block OTSBitcoinBlock must exist at that height 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 0xb0003dc6376638e70dfeebf70c60e4888882fbac5a9b0b7b27bdbd03733f2dce. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NLX091904041.
  date published: 2026-07-03T09:04:44Z
audio: Ik Blijf Je Vriend
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 114.953
  additional property: Musical Key
    type: PropertyValue
    value: 1
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.532
  additional property: Energy
    type: PropertyValue
    value: 0.791
  additional property: Speechiness
    type: PropertyValue
    value: 0.033
  additional property: Acousticness
    type: PropertyValue
    value: 0.462
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.411
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.604
  additional property: Loudness (dB)
    type: PropertyValue
    value: -4.837
  additional property: Key Name
    type: PropertyValue
    value: C#
  additional property: Mode Name
    type: PropertyValue
    value: Major

Biertje
type: MusicRecording
duration: PT3M19S
duration ms: 199186
explicit: false
by artist: Leen Zijlmans
in album: Mijn Herinneringen
  type: MusicAlbum
  date published: 2008-05-05
isrc code: NLX091904042
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-14T19:06:26+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7a82ba9e1d213d1d7087767a4137bc700f3a5b5938d98d7c86ef96a4f9fadd17
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958054
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/958054
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091904042
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-14T19:33:24Z
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 → block OTSBitcoinBlock must exist at that height 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 0x7a82ba9e1d213d1d7087767a4137bc700f3a5b5938d98d7c86ef96a4f9fadd17. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/NLX091904042.
  date published: 2026-07-14T19:33:24Z
audio: Biertje
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 99.876
  additional property: Musical Key
    type: PropertyValue
    value: 3
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.775
  additional property: Energy
    type: PropertyValue
    value: 0.926
  additional property: Speechiness
    type: PropertyValue
    value: 0.161
  additional property: Acousticness
    type: PropertyValue
    value: 0.474
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.29
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.849
  additional property: Loudness (dB)
    type: PropertyValue
    value: -3.695
  additional property: Key Name
    type: PropertyValue
    value: Eb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Doe Wat Je Wilt
type: MusicRecording
duration: PT3M27S
duration ms: 207626
explicit: false
by artist: Leen Zijlmans
in album: Mijn Herinneringen
  type: MusicAlbum
  date published: 2008-05-05
isrc code: NLX091904043
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-12T03:24:35+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8d84e67f176d63a1dab8296215d6ee221582d9cfb1e0183d00b5f69660fe42fb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957648
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/957648
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091904043
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-12T03:52:24Z
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 → block OTSBitcoinBlock must exist at that height 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 0x8d84e67f176d63a1dab8296215d6ee221582d9cfb1e0183d00b5f69660fe42fb. Chain 2 (Bitcoin): anchored in block 957648 (2026-07-12T03:52:24Z), 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/NLX091904043.
  date published: 2026-07-12T03:52:24Z
audio: Doe Wat Je Wilt
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 185.186
  additional property: Musical Key
    type: PropertyValue
    value: 3
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 3
  additional property: Danceability
    type: PropertyValue
    value: 0.315
  additional property: Energy
    type: PropertyValue
    value: 0.717
  additional property: Speechiness
    type: PropertyValue
    value: 0.104
  additional property: Acousticness
    type: PropertyValue
    value: 0.314
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.211
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.367
  additional property: Loudness (dB)
    type: PropertyValue
    value: -6.112
  additional property: Key Name
    type: PropertyValue
    value: Eb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Mijn Herinneringen
type: MusicAlbum
date published: 2008-05-05

mijn herinneringen
type: MusicAlbum
date published: 2008-05-05

Alleen Met Jou
type: MusicAlbum
date published: 2008-05-05

Caballero
type: MusicAlbum
date published: 2008-08-05

Blijf wie je bent
type: MusicAlbum
date published: 2009-03-18

Op De Slee Naar Benee
type: MusicAlbum
date published: 2010-01-10

Op De Slee Naar Benee
type: MusicAlbum
date published: 2010-01-10

Ad De Advocaat
type: MusicAlbum
date published: 2012-01-04

De Rumba
type: MusicAlbum
date published: 2012-07-17

Leen...komt naar je toe!
type: MusicAlbum
date published: 2012-12-19
track: Stralend door het leven
  type: MusicRecording
  duration: PT3M42S
  duration ms: 222000
  explicit: false
  by artist: Leen Zijlmans
  in album: Leen...komt naar je toe!
    type: MusicAlbum
    date published: 2012-12-19
  isrc code: NLA630500001
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-04T14:50:15+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xe57bce9da89b6fb7e4afd538ecbd2c0d6603891f0cd264f195e808f0c6752ee9
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956725
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block/956725
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA630500001
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-05T01:12:41Z
  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 → block OTSBitcoinBlock must exist at that height 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 0xe57bce9da89b6fb7e4afd538ecbd2c0d6603891f0cd264f195e808f0c6752ee9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLA630500001.
    date published: 2026-07-05T01:12:41Z
  audio: Stralend door het leven
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 188.089
    additional property: Musical Key
      type: PropertyValue
      value: 3
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 3
    additional property: Danceability
      type: PropertyValue
      value: 0.497
    additional property: Energy
      type: PropertyValue
      value: 0.726
    additional property: Speechiness
      type: PropertyValue
      value: 0.037
    additional property: Acousticness
      type: PropertyValue
      value: 0.08
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.227
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.91
    additional property: Loudness (dB)
      type: PropertyValue
      value: -6.181
    additional property: Key Name
      type: PropertyValue
      value: Eb
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Leen...komt naar je toe!
type: MusicAlbum
date published: 2012-12-19

Wat Een Feest
type: MusicAlbum
date published: 2013-06-01

Doe wat je wilt
type: MusicAlbum
date published: 2014-07-31

Daar Zijn Opa's Voor
type: MusicAlbum
date published: 2014-10-02

Blijf Wie Je Bent
type: MusicAlbum
date published: 2016-03-11

moments to remember
type: MusicAlbum
date published: 2016-07-15

blijf wie je bent
type: MusicAlbum
date published: 2016-07-15

pluk de dag met...
type: MusicAlbum
date published: 2016-07-15

ik kan niet zeggen wat ik voel
type: MusicAlbum
date published: 2016-07-15

mijn herinneringen
type: MusicAlbum
date published: 2016-07-23

Ik Zal Je Missen
type: MusicAlbum
date published: 2017-05-05

Ik Zal Je Missen
type: MusicAlbum
date published: 2017-09-10

Leentje Doe(t) Er Nog Eentje
type: MusicAlbum
date published: 2018-04-20

Leentje Doe(t) Er Nog Eentje
type: MusicAlbum
date published: 2018-04-20

Pluk de dag met Leen
type: MusicAlbum
date published: 2019-01-30
track: Als Ik 'S Morgens Vroeg Op Sta
  type: MusicRecording
  duration: PT3M8S
  duration ms: 188092
  explicit: false
  by artist: Leen Zijlmans
  in album: Pluk de dag met Leen
    type: MusicAlbum
    date published: 2019-01-30
  isrc code: NLX091901027
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-28T19:59:42+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x93cbe33d8ab4bced9a337cde3af5fe41954f66845749ce6997c212e99ec6e975
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956375
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block/956375
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091901027
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T16:51:38Z
  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 → block OTSBitcoinBlock must exist at that height 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 0x93cbe33d8ab4bced9a337cde3af5fe41954f66845749ce6997c212e99ec6e975. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLX091901027.
    date published: 2026-07-02T16:51:38Z
  audio: Als Ik 'S Morgens Vroeg Op Sta
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 192.121
    additional property: Musical Key
      type: PropertyValue
      value: 11
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 3
    additional property: Danceability
      type: PropertyValue
      value: 0.413
    additional property: Energy
      type: PropertyValue
      value: 0.713
    additional property: Speechiness
      type: PropertyValue
      value: 0.045
    additional property: Acousticness
      type: PropertyValue
      value: 0.018
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.175
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.561
    additional property: Loudness (dB)
      type: PropertyValue
      value: -6.547
    additional property: Key Name
      type: PropertyValue
      value: B
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Er Is maar een Ding
  type: MusicRecording
  duration: PT3M7S
  duration ms: 187412
  explicit: false
  by artist: Leen Zijlmans
  in album: Pluk de dag met Leen
    type: MusicAlbum
    date published: 2019-01-30
  isrc code: NLX091901028
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-16T10:59:46+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xcf4441910190a83b4880191336ac7431b7571f128d5238a07107a2ca2ad7699d
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958286
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block/958286
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091901028
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-16T14:11:21Z
  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 → block OTSBitcoinBlock must exist at that height 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 0xcf4441910190a83b4880191336ac7431b7571f128d5238a07107a2ca2ad7699d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:11:21Z), 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/NLX091901028.
    date published: 2026-07-16T14:11:21Z
  audio: Er Is maar een Ding
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 121.934
    additional property: Musical Key
      type: PropertyValue
      value: 3
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.696
    additional property: Energy
      type: PropertyValue
      value: 0.66
    additional property: Speechiness
      type: PropertyValue
      value: 0.034
    additional property: Acousticness
      type: PropertyValue
      value: 0.212
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.116
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.761
    additional property: Loudness (dB)
      type: PropertyValue
      value: -5.747
    additional property: Key Name
      type: PropertyValue
      value: Eb
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Die Ouwe Venter
  type: MusicRecording
  duration: PT3M56S
  duration ms: 236039
  explicit: false
  by artist: Leen Zijlmans
  in album: Pluk de dag met Leen
    type: MusicAlbum
    date published: 2019-01-30
  isrc code: NLX091901029
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-12T03:49:10+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xd562b6762a93c2b7721db92de3e720ee64b48ea21834cbb6ede3f2353557f4c3
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957650
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block/957650
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091901029
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Die Ouwe Venter
track: Mijn Zonnestraaltje
track: Jouw Stralende Ogen
track: Vanavond Gaat het Gebeuren
track: De Oude Saxofoon
track: Na Al Die Jaren
track: Ik Begrijp Nu Waarom

OTSTimestamp
type: PropertyValue
value: 2026-07-12T04:18:57Z

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 → block OTSBitcoinBlock must exist at that height 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd562b6762a93c2b7721db92de3e720ee64b48ea21834cbb6ede3f2353557f4c3. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/NLX091901029.
date published: 2026-07-12T04:18:57Z

Die Ouwe Venter
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 199.996
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: 0.532
additional property: Energy
  type: PropertyValue
  value: 0.793
additional property: Speechiness
  type: PropertyValue
  value: 0.063
additional property: Acousticness
  type: PropertyValue
  value: 0.494
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.137
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.945
additional property: Loudness (dB)
  type: PropertyValue
  value: -5.229
additional property: Key Name
  type: PropertyValue
  value: C
additional property: Mode Name
  type: PropertyValue
  value: Major

Mijn Zonnestraaltje
type: MusicRecording
duration: PT2M59S
duration ms: 179679
explicit: false
by artist: Leen Zijlmans
in album: Pluk de dag met Leen
  type: MusicAlbum
  date published: 2019-01-30
isrc code: NLX091901030
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-16T05:49:12+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3ac82759854ee67485b282e5aa282e93c0b820b3bd61644b559f60d538b8643d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958246
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/958246
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091901030
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-16T05:55:09Z
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 → block OTSBitcoinBlock must exist at that height 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 0x3ac82759854ee67485b282e5aa282e93c0b820b3bd61644b559f60d538b8643d. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/NLX091901030.
  date published: 2026-07-16T05:55:09Z
audio: Mijn Zonnestraaltje
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 123.043
  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: 0.696
  additional property: Energy
    type: PropertyValue
    value: 0.682
  additional property: Speechiness
    type: PropertyValue
    value: 0.03
  additional property: Acousticness
    type: PropertyValue
    value: 0.065
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.034
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.94
  additional property: Loudness (dB)
    type: PropertyValue
    value: -6.447
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major

Jouw Stralende Ogen
type: MusicRecording
duration: PT3M51S
duration ms: 231146
explicit: false
by artist: Leen Zijlmans
in album: Pluk de dag met Leen
  type: MusicAlbum
  date published: 2019-01-30
isrc code: NLX091901032
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-13T09:44:22+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7a3421aecb87d8bf785fc5c9ac9a4d5b45ae8d467d2b2c957813e07a16ef1b6a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957852
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/957852
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091901032
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-13T11:25:45Z
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 → block OTSBitcoinBlock must exist at that height 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 0x7a3421aecb87d8bf785fc5c9ac9a4d5b45ae8d467d2b2c957813e07a16ef1b6a. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/NLX091901032.
  date published: 2026-07-13T11:25:45Z
audio: Jouw Stralende Ogen
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 81.99
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.544
  additional property: Energy
    type: PropertyValue
    value: 0.536
  additional property: Speechiness
    type: PropertyValue
    value: 0.038
  additional property: Acousticness
    type: PropertyValue
    value: 0.443
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.151
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.172
  additional property: Loudness (dB)
    type: PropertyValue
    value: -8.47
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Major

Vanavond Gaat het Gebeuren
type: MusicRecording
duration: PT3M22S
duration ms: 202986
explicit: false
by artist: Leen Zijlmans
in album: Pluk de dag met Leen
  type: MusicAlbum
  date published: 2019-01-30
isrc code: NLX091901033
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-16T05:55:33+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6f5b8235285e9534db9b2c9c58b2510bfbf00b9dd6452d9b7b5ffe0d9505a4ee
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958251
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/958251
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091901033
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-16T06:29:25Z
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 → block OTSBitcoinBlock must exist at that height 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 0x6f5b8235285e9534db9b2c9c58b2510bfbf00b9dd6452d9b7b5ffe0d9505a4ee. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/NLX091901033.
  date published: 2026-07-16T06:29:25Z
audio: Vanavond Gaat het Gebeuren
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 97.027
  additional property: Musical Key
    type: PropertyValue
    value: 11
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.676
  additional property: Energy
    type: PropertyValue
    value: 0.836
  additional property: Speechiness
    type: PropertyValue
    value: 0.03
  additional property: Acousticness
    type: PropertyValue
    value: 0.488
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.174
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.889
  additional property: Loudness (dB)
    type: PropertyValue
    value: -5.513
  additional property: Key Name
    type: PropertyValue
    value: B
  additional property: Mode Name
    type: PropertyValue
    value: Major

De Oude Saxofoon
type: MusicRecording
duration: PT3M50S
duration ms: 230679
explicit: false
by artist: Leen Zijlmans
in album: Pluk de dag met Leen
  type: MusicAlbum
  date published: 2019-01-30
isrc code: NLX091901035
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-12T03:52:10+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xcb1c181c9ebe89bfa5a8d5ca19976148ae9b8d29727aeaa54d4bf08571dfa5d6
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957650
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/957650
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091901035
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-12T04:18:57Z
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 → block OTSBitcoinBlock must exist at that height 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 0xcb1c181c9ebe89bfa5a8d5ca19976148ae9b8d29727aeaa54d4bf08571dfa5d6. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/NLX091901035.
  date published: 2026-07-12T04:18:57Z
audio: De Oude Saxofoon
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 123.88
  additional property: Musical Key
    type: PropertyValue
    value: 7
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.58
  additional property: Energy
    type: PropertyValue
    value: 0.641
  additional property: Speechiness
    type: PropertyValue
    value: 0.042
  additional property: Acousticness
    type: PropertyValue
    value: 0.383
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.379
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.385
  additional property: Loudness (dB)
    type: PropertyValue
    value: -6.872
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Major

Na Al Die Jaren
type: MusicRecording
duration: PT3M15S
duration ms: 195146
explicit: false
by artist: Leen Zijlmans
in album: Pluk de dag met Leen
  type: MusicAlbum
  date published: 2019-01-30
isrc code: NLX091901036
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-03T00:30:56+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xab253b628d264d537e38be94939d9a732b70d9e88250ea2f6b8ced54f8359322
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956422
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/956422
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091901036
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-03T01:01:38Z
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 → block OTSBitcoinBlock must exist at that height 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 0xab253b628d264d537e38be94939d9a732b70d9e88250ea2f6b8ced54f8359322. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLX091901036.
  date published: 2026-07-03T01:01:38Z
audio: Na Al Die Jaren
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 202.947
  additional property: Musical Key
    type: PropertyValue
    value: 7
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.385
  additional property: Energy
    type: PropertyValue
    value: 0.621
  additional property: Speechiness
    type: PropertyValue
    value: 0.035
  additional property: Acousticness
    type: PropertyValue
    value: 0.353
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.208
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.619
  additional property: Loudness (dB)
    type: PropertyValue
    value: -6.809
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Major

Ik Begrijp Nu Waarom
type: MusicRecording
duration: PT4M23S
duration ms: 263292
explicit: false
by artist: Leen Zijlmans
in album: Pluk de dag met Leen
  type: MusicAlbum
  date published: 2019-01-30
isrc code: NLX091901037
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-02T20:53:06+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x608548100d65784ddc4f5bf550075744211b4c0770bf6b065b5dd11ebd313424
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956396
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/956396
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091901037
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T21:01:51Z
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 → block OTSBitcoinBlock must exist at that height 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 0x608548100d65784ddc4f5bf550075744211b4c0770bf6b065b5dd11ebd313424. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/NLX091901037.
  date published: 2026-07-02T21:01:51Z
audio: Ik Begrijp Nu Waarom
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 91.994
  additional property: Musical Key
    type: PropertyValue
    value: 10
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.679
  additional property: Energy
    type: PropertyValue
    value: 0.577
  additional property: Speechiness
    type: PropertyValue
    value: 0.031
  additional property: Acousticness
    type: PropertyValue
    value: 0.654
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.011
  additional property: Liveness
    type: PropertyValue
    value: 0.102
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.621
  additional property: Loudness (dB)
    type: PropertyValue
    value: -7.105
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Moments To Remember
type: MusicAlbum
date published: 2019-01-30

Caballero
type: MusicAlbum
date published: 2019-01-30

Ad de Advocaat
type: MusicAlbum
date published: 2019-01-30

Blijf Wie Je Bent
type: MusicAlbum
date published: 2019-01-30

Alleen Met Jou
type: MusicAlbum
date published: 2019-01-30

Ik Kan Niet Zeggen Wat Ik Voel
type: MusicAlbum
date published: 2019-01-30
track: Ik Voel Me Niet Alleen
  type: MusicRecording
  duration: PT3M42S
  duration ms: 222666
  explicit: false
  by artist: Leen Zijlmans
  in album: Ik Kan Niet Zeggen Wat Ik Voel
    type: MusicAlbum
    date published: 2019-01-30
  isrc code: NLX091901016
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-14T20:26:53+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xcd9b493d0c36b4c7fec2ebfae72cd86132dd97fc9ad17606d91f1ddf38f50f29
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958060
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block/958060
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091901016
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-14T20:39:42Z
  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 → block OTSBitcoinBlock must exist at that height 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 0xcd9b493d0c36b4c7fec2ebfae72cd86132dd97fc9ad17606d91f1ddf38f50f29. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NLX091901016.
    date published: 2026-07-14T20:39:42Z
  audio: Ik Voel Me Niet Alleen
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 115.069
    additional property: Musical Key
      type: PropertyValue
      value: 1
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.782
    additional property: Energy
      type: PropertyValue
      value: 0.672
    additional property: Speechiness
      type: PropertyValue
      value: 0.037
    additional property: Acousticness
      type: PropertyValue
      value: 0.192
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.037
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.639
    additional property: Loudness (dB)
      type: PropertyValue
      value: -11.457
    additional property: Key Name
      type: PropertyValue
      value: C#
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Toeren
  type: MusicRecording
  duration: PT3M2S
  duration ms: 182039
  explicit: false
  by artist: Leen Zijlmans
  in album: Ik Kan Niet Zeggen Wat Ik Voel
    type: MusicAlbum
    date published: 2019-01-30
  isrc code: NLX091901018
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-14T20:09:57+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x572c706a17a360a811344ee8057d985bab9706fd37a3ed7b7bd2b73c6a07c5db
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958060
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block/958060
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091901018
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-14T20:39:42Z
  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 → block OTSBitcoinBlock must exist at that height 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 0x572c706a17a360a811344ee8057d985bab9706fd37a3ed7b7bd2b73c6a07c5db. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NLX091901018.
    date published: 2026-07-14T20:39:42Z
  audio: Toeren
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 98.045
    additional property: Musical Key
      type: PropertyValue
      value: 9
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.761
    additional property: Energy
      type: PropertyValue
      value: 0.683
    additional property: Speechiness
      type: PropertyValue
      value: 0.042
    additional property: Acousticness
      type: PropertyValue
      value: 0.35
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.145
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.889
    additional property: Loudness (dB)
      type: PropertyValue
      value: -8.659
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: De Liefde Vannacht
  type: MusicRecording
  duration: PT3M1S
  duration ms: 181946
  explicit: false
  by artist: Leen Zijlmans
  in album: Ik Kan Niet Zeggen Wat Ik Voel
    type: MusicAlbum
    date published: 2019-01-30
  isrc code: NLX091901019
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-16T16:08:59+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x54e918abdfd55e09b5a6f7d2c0748c04c24a885965f8792499df28b14714cf23
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958316
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block/958316
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091901019
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: De Liefde Vannacht
track: Ik Kan Niet Zeggen
track: Jij Ben Alles
track: Al Jaren Vrijgezel
track: Dans met Mij
track: Laat Hem Vrij

OTSTimestamp
type: PropertyValue
value: 2026-07-16T23:04:59Z

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 → block OTSBitcoinBlock must exist at that height 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e918abdfd55e09b5a6f7d2c0748c04c24a885965f8792499df28b14714cf23. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:04:59Z), 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/NLX091901019.
date published: 2026-07-16T23:04:59Z

De Liefde Vannacht
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 125.014
additional property: Musical Key
  type: PropertyValue
  value: 9
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 4
additional property: Danceability
  type: PropertyValue
  value: 0.734
additional property: Energy
  type: PropertyValue
  value: 0.65
additional property: Speechiness
  type: PropertyValue
  value: 0.029
additional property: Acousticness
  type: PropertyValue
  value: 0.041
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.081
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.846
additional property: Loudness (dB)
  type: PropertyValue
  value: -6.975
additional property: Key Name
  type: PropertyValue
  value: A
additional property: Mode Name
  type: PropertyValue
  value: Major

Ik Kan Niet Zeggen
type: MusicRecording
duration: PT3M21S
duration ms: 201866
explicit: false
by artist: Leen Zijlmans
in album: Ik Kan Niet Zeggen Wat Ik Voel
  type: MusicAlbum
  date published: 2019-01-30
isrc code: NLX091901020
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-14T20:04:59+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2cf272306ab77e7d03e377a2f2c21090586cd454a1cf7b227e0d48d27b98464d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958060
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/958060
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091901020
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-14T20:39:42Z
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 → block OTSBitcoinBlock must exist at that height 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 0x2cf272306ab77e7d03e377a2f2c21090586cd454a1cf7b227e0d48d27b98464d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NLX091901020.
  date published: 2026-07-14T20:39:42Z
audio: Ik Kan Niet Zeggen
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 148.103
  additional property: Musical Key
    type: PropertyValue
    value: 10
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.706
  additional property: Energy
    type: PropertyValue
    value: 0.611
  additional property: Speechiness
    type: PropertyValue
    value: 0.031
  additional property: Acousticness
    type: PropertyValue
    value: 0.255
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.131
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.668
  additional property: Loudness (dB)
    type: PropertyValue
    value: -10.397
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Jij Ben Alles
type: MusicRecording
duration: PT3M56S
duration ms: 236079
explicit: false
by artist: Leen Zijlmans
in album: Ik Kan Niet Zeggen Wat Ik Voel
  type: MusicAlbum
  date published: 2019-01-30
isrc code: NLX091901023
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-03T14:28:08+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8d0fd8a84319687680e25d84abf647c59c0f7a2ddf6ce1d78e3d728cd632c458
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956545
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/956545
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091901023
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-03T19:59:51Z
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 → block OTSBitcoinBlock must exist at that height 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 0x8d0fd8a84319687680e25d84abf647c59c0f7a2ddf6ce1d78e3d728cd632c458. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLX091901023.
  date published: 2026-07-03T19:59:51Z
audio: Jij Ben Alles
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 120.013
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.727
  additional property: Energy
    type: PropertyValue
    value: 0.703
  additional property: Speechiness
    type: PropertyValue
    value: 0.042
  additional property: Acousticness
    type: PropertyValue
    value: 0.021
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.038
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.677
  additional property: Loudness (dB)
    type: PropertyValue
    value: -10.393
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

Al Jaren Vrijgezel
type: MusicRecording
duration: PT3M18S
duration ms: 198972
explicit: false
by artist: Leen Zijlmans
in album: Ik Kan Niet Zeggen Wat Ik Voel
  type: MusicAlbum
  date published: 2019-01-30
isrc code: NLX091901024
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-12T02:50:04+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x229ca9d619c37b6d5262fecd7a301d6539e7a500ff4011608d2dc3dd60e61f0c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957644
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/957644
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091901024
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-12T03:18:52Z
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 → block OTSBitcoinBlock must exist at that height 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 0x229ca9d619c37b6d5262fecd7a301d6539e7a500ff4011608d2dc3dd60e61f0c. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/NLX091901024.
  date published: 2026-07-12T03:18:52Z
audio: Al Jaren Vrijgezel
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 189.938
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.581
  additional property: Energy
    type: PropertyValue
    value: 0.678
  additional property: Speechiness
    type: PropertyValue
    value: 0.117
  additional property: Acousticness
    type: PropertyValue
    value: 0.173
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.044
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.875
  additional property: Loudness (dB)
    type: PropertyValue
    value: -8.916
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Major

Dans met Mij
type: MusicRecording
duration: PT3M38S
duration ms: 218426
explicit: false
by artist: Leen Zijlmans
in album: Ik Kan Niet Zeggen Wat Ik Voel
  type: MusicAlbum
  date published: 2019-01-30
isrc code: NLX091901025
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-14T19:39:52+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x735bf0b1e7d8c6c5ae96ff402341da4ba35cd9bbb00c406d7d80c9d761b42f28
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958058
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/958058
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091901025
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-14T20:20:34Z
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 → block OTSBitcoinBlock must exist at that height 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 0x735bf0b1e7d8c6c5ae96ff402341da4ba35cd9bbb00c406d7d80c9d761b42f28. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/NLX091901025.
  date published: 2026-07-14T20:20:34Z
audio: Dans met Mij
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 105.08
  additional property: Musical Key
    type: PropertyValue
    value: 1
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.715
  additional property: Energy
    type: PropertyValue
    value: 0.63
  additional property: Speechiness
    type: PropertyValue
    value: 0.035
  additional property: Acousticness
    type: PropertyValue
    value: 0.178
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.004
  additional property: Liveness
    type: PropertyValue
    value: 0.107
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.56
  additional property: Loudness (dB)
    type: PropertyValue
    value: -10.348
  additional property: Key Name
    type: PropertyValue
    value: C#
  additional property: Mode Name
    type: PropertyValue
    value: Major

Laat Hem Vrij
type: MusicRecording
duration: PT3M43S
duration ms: 223946
explicit: false
by artist: Leen Zijlmans
in album: Ik Kan Niet Zeggen Wat Ik Voel
  type: MusicAlbum
  date published: 2019-01-30
isrc code: NLX091901026
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-03T14:26:16+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9726e5eb13958d1eea26abd7d860a595c4da48b7badfda7e8d0df5c7bb5ae0a8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956551
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/956551
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX091901026
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-03T21:18:05Z
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 → block OTSBitcoinBlock must exist at that height 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
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  date published: 2026-07-03T21:18:05Z
audio: Laat Hem Vrij
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Geluk Zit Vaak In Hele Kleine Dingen
type: MusicAlbum
date published: 2019-02-15

Geluk Zit Vaak In Hele Kleine Dingen
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date published: 2019-02-15

Je Zien Huilen Kan Ik Niet
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date published: 2019-10-11

Je Zien Huilen Kan Ik Niet
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date published: 2019-10-11

Jij Bent Het Leven Voor Mij
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date published: 2020-10-14

Jij Bent Het Leven Voor Mij
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date published: 2020-10-14

Jij Brengt Weer Glans in Mijn Leven
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date published: 2021-09-08

Als vader mag je best wel even huilen
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date published: 2022-05-25

Wals Medley 50 jaar Leen
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    date published: 2026-07-15T15:03:09Z
  audio: Wals Medley 50 jaar Leen
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Nog steeds
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    date published: 2026-07-16T08:28:24Z
  audio: Nog Steeds
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Wat een Feest
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date published: 2023-07-31

Klaar met het verleden
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date published: 2023-09-13

Zondagmiddag 2.0
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date published: 2024-06-12

Blijf Wie Je Bent
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date published: 2024-10-02

Ik Hou van het Leven
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date published: 2025-09-26