Kinderliedjes Loulou en Lou
type: MusicGroup
genre: children's music
popularity: 46
followers: 5443
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additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSProofURL
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additional property: OTSVerificationAPI
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additional property: OTSVerifyInstructions
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  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2531f42f93dd354ba8c5db96ff243c4101a47a002eb7d7a27b621d44b7808d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/966cb19d-4747-4cfb-b8ff-38958d139b3f.json and https://artists.proofprofile.net/proofs/artist/966cb19d-4747-4cfb-b8ff-38958d139b3f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-12T19:24:56Z
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album: Ei Koe Rei
  type: MusicAlbum
  date published: 2017
album: Boer Wat Zeg Je Van Mijn Kippen
  type: MusicAlbum
  date published: 2017
album: Een Koetje En Een Kalfje
  type: MusicAlbum
  date published: 2017
album: De Mol
  type: MusicAlbum
  date published: 2017
album: Piano Liedjes (Piano Versie)
  type: MusicAlbum
  date published: 2017-02-07
album: Piano Kinderliedjes
  type: MusicAlbum
  date published: 2017-02-07
  track: Hoofd schouders knie en teen - Pianoversie
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    in album: Piano Kinderliedjes
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      date published: 2017-02-07
    genre: children's music
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    additional property: OTSVerificationAPI
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    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-15T23:24:33Z
    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24ccec22916ee333510512ad7018e7106eb084fc10ae6a634152638e53b2e81. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700015 — a six-check JSON result.
      date published: 2026-07-15T23:24:33Z
    audio: Hoofd schouders knie en teen - Pianoversie
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  track: Zagen zagen wiedewagen - Pianoversie
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    in album: Piano Kinderliedjes
      type: MusicAlbum
      date published: 2017-02-07
    genre: children's music
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    additional property: OTSTimestamp
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    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22362526b384413b2c8238cc5bd805070f96968eff93910369e15eb433818a6d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700016 — a six-check JSON result.
      date published: 2026-07-15T13:14:32Z
    audio: Zagen zagen wiedewagen - Pianoversie
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  track: Vader Jacob - Pianoversie
  track: Papegaaitje leef je nog - Pianoversie
  track: Hansje pansje kevertje - Pianoversie
  track: Alfabetlied - Pianoversie
album: Slaapliedjes Op Piano
album: Slaapliedjes (Piano)
album: Klassieke Pianoliedjes
album: Klassieke Piano Liedjes
album: Ik zag twee hazen
album: Het Is Weer Pasen
album: Paasliedjes - Kinderliedjes
album: Iene Miene Mutte
album: Berend Botje
album: Alle Eendjes Zwemmen In Het Water
album: Hoedje Van Papier
album: Ik Zag Twee Beren
album: Klap Eens In Je Handjes
album: Klein Klein Kleutertje
album: Brahms’ lullaby
album: Kinderliedjes
album: Kinderyoga
album: Wilhelmus
album: Kindermeditatie
album: Op Een Grote Paddestoel
album: Yoga Voor Kinderen
album: Moederdag
album: Zen Baby Sleep
album: Moederdag - Kinderliedjes
album: Het Alfabetlied
album: Drie Maal Drie Is Negen
album: In De Manenschijn
album: Nederlandse Kinderliedjes - De Wielen Van De Bus - In De Maneschijn
album: De Wielen Van De Bus
album: Hannes Loopt Op Klompen
album: Hansje Pansje Kevertje
album: Op Een Klein Stationnetje
album: Papegaaitje Leef Je Nog
album: De 20 Beste Kinderliedjes
album: Lang Zal Ze leven
album: Vader Jacob
album: 30 Bekende Klassieke Instrumentale Piano Liedjes Voor Kinderen
album: 30 Bekende Kinderliedjes Op Piano
album: Drie Kleine Kleutertjes
album: Pianoliedjes Voor Baby's
album: Dit Zijn Mijn Wangetjes
album: Zagen Zagen
album: Klassieke Muziek voor Baby, Peuters en Kleuters
album: Klassieke Muziek voor Kinderen
album: Altijd Is Kortjakje Ziek
album: Poesje Mauw
album: Kinderliedjes Loulou en Lou
album: De Zevensprong
album: Dierendag
album: Sinterklaasliedjes Loulou & Lou (Piano Versie)
album: Sinterklaasliedjes Op Piano
album: De 50 Beste Kinderliedjes
album: Halloween
album: Rood Kapje
album: Slaap Kindje Slaap
album: Ik Heb Een Stuiver
album: Sinterklaasje Bonne Bonne Bone
album: Sinterklaasliedjes

Speechiness
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value: 0.066

Acousticness
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Instrumentalness
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Liveness
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Valence (Positivity)
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Loudness (dB)
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Key Name
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value: Bb

Mode Name
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Vader Jacob - Pianoversie
type: MusicRecording
duration: PT0M52S
duration ms: 52330
explicit: false
by artist: Kinderliedjes Loulou en Lou
in album: Piano Kinderliedjes
  type: MusicAlbum
  date published: 2017-02-07
genre: children's music
isrc code: NLGM11700017
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04582aa89dab991444363f0e803e62027508c1b0840bb43a0f66b40cff5d53c7. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700017 — a six-check JSON result.
  date published: 2026-07-14T21:26:15Z
audio: Vader Jacob - Pianoversie
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Papegaaitje leef je nog - Pianoversie
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duration: PT0M33S
duration ms: 33168
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by artist: Kinderliedjes Loulou en Lou
in album: Piano Kinderliedjes
  type: MusicAlbum
  date published: 2017-02-07
genre: children's music
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additional property: CopyrightID
additional property: CopyrightStatus
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6e7a0eb2758928cec6f800e8af65d00c02a9dd3a705c9a82a79af28688ae28. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700018 — a six-check JSON result.
  date published: 2026-07-16T16:14:30Z
audio: Papegaaitje leef je nog - Pianoversie
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Hansje pansje kevertje - Pianoversie
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in album: Piano Kinderliedjes
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genre: children's music
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additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf182c68186b80f94144f6df87581a672df3699f77c541d3edcb2076aebbf9e57. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700020 — a six-check JSON result.
  date published: 2026-07-14T22:45:25Z
audio: Hansje pansje kevertje - Pianoversie
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Alfabetlied - Pianoversie
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explicit: false
by artist: Kinderliedjes Loulou en Lou
in album: Piano Kinderliedjes
  type: MusicAlbum
  date published: 2017-02-07
genre: children's music
isrc code: NLGM11700021
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-03T18:42:16+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x368663cd2de444baf4160f3aae35d4389572e6cbf3395ddbcd0d23a957fba3af
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956545
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956545
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700021
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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368663cd2de444baf4160f3aae35d4389572e6cbf3395ddbcd0d23a957fba3af. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700021 — a six-check JSON result.
  date published: 2026-07-03T19:59:51Z
audio: Alfabetlied - Pianoversie
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 132.379
  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: 0.642
  additional property: Energy
    type: PropertyValue
    value: 0.217
  additional property: Speechiness
    type: PropertyValue
    value: 0.081
  additional property: Acousticness
    type: PropertyValue
    value: 0.995
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.948
  additional property: Liveness
    type: PropertyValue
    value: 0.115
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.466
  additional property: Loudness (dB)
    type: PropertyValue
    value: -15.267
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major

Slaapliedjes Op Piano
type: MusicAlbum
date published: 2017-02-09
track: Klap eens in je handjes - Pianoversie
  type: MusicRecording
  duration: PT0M44S
  duration ms: 44723
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Slaapliedjes Op Piano
    type: MusicAlbum
    date published: 2017-02-09
  genre: children's music
  isrc code: NLGM11700001
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-12T13:50:21+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xc9d7db75948c6e199ec4168d71c1f094c52ad142d97db0117fbd61a258840b56
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957711
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957711
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700001
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-12T13:56:57Z
  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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d7db75948c6e199ec4168d71c1f094c52ad142d97db0117fbd61a258840b56. Chain 2 (Bitcoin): anchored in block 957711 (2026-07-12T13:56:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700001 — a six-check JSON result.
    date published: 2026-07-12T13:56:57Z
  audio: Klap eens in je handjes - Pianoversie
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 93.986
    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: 0.523
    additional property: Energy
      type: PropertyValue
      value: 0.305
    additional property: Speechiness
      type: PropertyValue
      value: 0.058
    additional property: Acousticness
      type: PropertyValue
      value: 0.989
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.91
    additional property: Liveness
      type: PropertyValue
      value: 0.152
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.223
    additional property: Loudness (dB)
      type: PropertyValue
      value: -15.407
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Alle eendjes zwemmen in het water - Pianoversie
  type: MusicRecording
  duration: PT0M39S
  duration ms: 39969
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Slaapliedjes Op Piano
    type: MusicAlbum
    date published: 2017-02-09
  genre: children's music
  isrc code: NLGM11700002
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-12T14:15:23+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xa323ae29271239ea1018a20fec91fe46c274e82ae42bad231b849bf371969ed3
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957714
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957714
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700002
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-12T14:35:57Z
  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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa323ae29271239ea1018a20fec91fe46c274e82ae42bad231b849bf371969ed3. Chain 2 (Bitcoin): anchored in block 957714 (2026-07-12T14:35:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700002 — a six-check JSON result.
    date published: 2026-07-12T14:35:57Z
  audio: Alle eendjes zwemmen in het water - Pianoversie
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 109.933
    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: 0.605
    additional property: Energy
      type: PropertyValue
      value: 0.171
    additional property: Speechiness
      type: PropertyValue
      value: 0.078
    additional property: Acousticness
      type: PropertyValue
      value: 0.995
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.936
    additional property: Liveness
      type: PropertyValue
      value: 0.135
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.329
    additional property: Loudness (dB)
      type: PropertyValue
      value: -14.578
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Brahms' Lullaby - Pianoversie
  type: MusicRecording
  duration: PT2M34S
  duration ms: 154924
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Slaapliedjes Op Piano
    type: MusicAlbum
    date published: 2017-02-09
  genre: children's music
  isrc code: NLGM11700008
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-14T21:14:39+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x1b722f31b3e0009c85455b1465760a2cd9a8a5c55030b802089b6764b6ccc108
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958067
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958067
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Brahms' Lullaby - Pianoversie

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700008

OTSTimestamp
type: PropertyValue
value: 2026-07-14T21:26:15Z

OTSVerifyInstructions
type: PropertyValue
value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b722f31b3e0009c85455b1465760a2cd9a8a5c55030b802089b6764b6ccc108. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700008 — a six-check JSON result.
date published: 2026-07-14T21:26:15Z

Brahms' Lullaby - Pianoversie
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 68.076
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: 0.502
additional property: Energy
  type: PropertyValue
  value: 0.024
additional property: Speechiness
  type: PropertyValue
  value: 0.043
additional property: Acousticness
  type: PropertyValue
  value: 0.995
additional property: Instrumentalness
  type: PropertyValue
  value: 0.919
additional property: Liveness
  type: PropertyValue
  value: 0.097
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.268
additional property: Loudness (dB)
  type: PropertyValue
  value: -23.233
additional property: Key Name
  type: PropertyValue
  value: Eb
additional property: Mode Name
  type: PropertyValue
  value: Major

Slaapliedjes (Piano)
type: MusicAlbum
date published: 2017-02-09

Klassieke Pianoliedjes
type: MusicAlbum
date published: 2017-02-13
track: Ik zag twee beren - Pianoversie
  type: MusicRecording
  duration: PT1M14S
  duration ms: 74799
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Klassieke Pianoliedjes
    type: MusicAlbum
    date published: 2017-02-13
  genre: children's music
  isrc code: NLGM11700022
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-28T20:03:27+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x69e137bd12483f119ba21ee0dd9f549d836b8bd40c7218c5b56d017ee473008f
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956375
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956375
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700022
  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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e137bd12483f119ba21ee0dd9f549d836b8bd40c7218c5b56d017ee473008f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700022 — a six-check JSON result.
    date published: 2026-07-02T16:51:38Z
  audio: Ik zag twee beren - Pianoversie
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 117.692
    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: 0.861
    additional property: Energy
      type: PropertyValue
      value: 0.171
    additional property: Speechiness
      type: PropertyValue
      value: 0.068
    additional property: Acousticness
      type: PropertyValue
      value: 0.989
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.956
    additional property: Liveness
      type: PropertyValue
      value: 0.123
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.438
    additional property: Loudness (dB)
      type: PropertyValue
      value: -14.161
    additional property: Key Name
      type: PropertyValue
      value: Bb
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Schipper mag ik overvaren - Pianoversie
  type: MusicRecording
  duration: PT0M49S
  duration ms: 49937
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Klassieke Pianoliedjes
    type: MusicAlbum
    date published: 2017-02-13
  genre: children's music
  isrc code: NLGM11700024
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-03T22:58:22+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x10c7099202e76809b8623a290ed73421ab28f4c7b7a110b3af78569f9348f7ea
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956634
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956634
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700024
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-04T10:04:33Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c7099202e76809b8623a290ed73421ab28f4c7b7a110b3af78569f9348f7ea. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700024 — a six-check JSON result.
    date published: 2026-07-04T10:04:33Z
  audio: Schipper mag ik overvaren - Pianoversie
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 105.961
    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: 0.624
    additional property: Energy
      type: PropertyValue
      value: 0.291
    additional property: Speechiness
      type: PropertyValue
      value: 0.086
    additional property: Acousticness
      type: PropertyValue
      value: 0.991
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.887
    additional property: Liveness
      type: PropertyValue
      value: 0.088
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.127
    additional property: Loudness (dB)
      type: PropertyValue
      value: -16.605
    additional property: Key Name
      type: PropertyValue
      value: Eb
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Dit zijn mijn wangetjes - Pianoversie
  type: MusicRecording
  duration: PT0M54S
  duration ms: 54098
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Klassieke Pianoliedjes
    type: MusicAlbum
    date published: 2017-02-13
  genre: children's music
  isrc code: NLGM11700025
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-18T18:40:34+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x60ac2af9a223eb5d9facc92f87804289b2b5615639f156b1fb8804098f562d65
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958600
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958600
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Dit zijn mijn wangetjes - Pianoversie
track: In Holland staat een huis - Pianoversie
track: Het regent, het zegent - Pianoversie

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700025

OTSTimestamp
type: PropertyValue
value: 2026-07-18T19:24:05Z

OTSVerifyInstructions
type: PropertyValue
value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ac2af9a223eb5d9facc92f87804289b2b5615639f156b1fb8804098f562d65. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700025 — a six-check JSON result.
date published: 2026-07-18T19:24:05Z

Dit zijn mijn wangetjes - Pianoversie
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 125.484
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: 0.454
additional property: Energy
  type: PropertyValue
  value: 0.179
additional property: Speechiness
  type: PropertyValue
  value: 0.059
additional property: Acousticness
  type: PropertyValue
  value: 0.993
additional property: Instrumentalness
  type: PropertyValue
  value: 0.913
additional property: Liveness
  type: PropertyValue
  value: 0.105
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.672
additional property: Loudness (dB)
  type: PropertyValue
  value: -16.537
additional property: Key Name
  type: PropertyValue
  value: C
additional property: Mode Name
  type: PropertyValue
  value: Major

In Holland staat een huis - Pianoversie
type: MusicRecording
duration: PT1M6S
duration ms: 66743
explicit: false
by artist: Kinderliedjes Loulou en Lou
in album: Klassieke Pianoliedjes
  type: MusicAlbum
  date published: 2017-02-13
genre: children's music
isrc code: NLGM11700028
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-12T15:13:47+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x82caa1486f13688798b812409bd16d5a93ac0350187b58b2efd865ee236b91eb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957720
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957720
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700028
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-12T15:26:09Z
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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82caa1486f13688798b812409bd16d5a93ac0350187b58b2efd865ee236b91eb. Chain 2 (Bitcoin): anchored in block 957720 (2026-07-12T15:26:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700028 — a six-check JSON result.
  date published: 2026-07-12T15:26:09Z
audio: In Holland staat een huis - Pianoversie
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 129.439
  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: 0.63
  additional property: Energy
    type: PropertyValue
    value: 0.124
  additional property: Speechiness
    type: PropertyValue
    value: 0.053
  additional property: Acousticness
    type: PropertyValue
    value: 0.992
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.933
  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.585
  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
    type: PropertyValue
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  additional property: Mode Name
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Het regent, het zegent - Pianoversie
type: MusicRecording
duration: PT1M5S
duration ms: 65171
explicit: false
by artist: Kinderliedjes Loulou en Lou
in album: Klassieke Pianoliedjes
  type: MusicAlbum
  date published: 2017-02-13
genre: children's music
isrc code: NLGM11700030
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-12T13:59:30+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdd60c4244222bcdb25f572ed2b3bc44a7d2dd3ee334e50fc8f561493aab79adc
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957714
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957714
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700030
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-12T14:35:57Z
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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd60c4244222bcdb25f572ed2b3bc44a7d2dd3ee334e50fc8f561493aab79adc. Chain 2 (Bitcoin): anchored in block 957714 (2026-07-12T14:35:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700030 — a six-check JSON result.
  date published: 2026-07-12T14:35:57Z
audio: Het regent, het zegent - Pianoversie
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 159.347
  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: 0.309
  additional property: Energy
    type: PropertyValue
    value: 0.282
  additional property: Speechiness
    type: PropertyValue
    value: 0.045
  additional property: Acousticness
    type: PropertyValue
    value: 0.965
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.782
  additional property: Liveness
    type: PropertyValue
    value: 0.116
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.361
  additional property: Loudness (dB)
    type: PropertyValue
    value: -19.63
  additional property: Key Name
    type: PropertyValue
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  additional property: Mode Name
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Klassieke Piano Liedjes
type: MusicAlbum
date published: 2017-02-13

Ik zag twee hazen
type: MusicAlbum
date published: 2017-03-22

Ik zag twee hazen
type: MusicAlbum
date published: 2017-03-22

Het Is Weer Pasen
type: MusicAlbum
date published: 2017-03-28

Paasliedjes - Kinderliedjes
type: MusicAlbum
date published: 2017-03-28

Iene Miene Mutte
type: MusicAlbum
date published: 2017-04-03

Iene Miene Mutte
type: MusicAlbum
date published: 2017-04-03

Berend Botje
type: MusicAlbum
date published: 2017-04-04

Berend Botje
type: MusicAlbum
date published: 2017-04-04

Alle Eendjes Zwemmen In Het Water
type: MusicAlbum
date published: 2017-04-04

Hoedje Van Papier
type: MusicAlbum
date published: 2017-04-06

Ik Zag Twee Beren
type: MusicAlbum
date published: 2017-04-11

Ik Zag Twee Beren
type: MusicAlbum
date published: 2017-04-11

Klap Eens In Je Handjes
type: MusicAlbum
date published: 2017-04-13

Klein Klein Kleutertje
type: MusicAlbum
date published: 2017-04-16

Brahms’ lullaby
type: MusicAlbum
date published: 2017-04-18

Kinderliedjes
type: MusicAlbum
date published: 2017-04-20

Kinderyoga
type: MusicAlbum
date published: 2017-04-22

Wilhelmus
type: MusicAlbum
date published: 2017-04-24

Kindermeditatie
type: MusicAlbum
date published: 2017-04-28

Op Een Grote Paddestoel
type: MusicAlbum
date published: 2017-05-01

Yoga Voor Kinderen
type: MusicAlbum
date published: 2017-05-05

Moederdag
type: MusicAlbum
date published: 2017-05-08

Moederdag
type: MusicAlbum
date published: 2017-05-08

Zen Baby Sleep
type: MusicAlbum
date published: 2017-05-10

Moederdag - Kinderliedjes
type: MusicAlbum
date published: 2017-05-11

Het Alfabetlied
type: MusicAlbum
date published: 2017-05-15

Drie Maal Drie Is Negen
type: MusicAlbum
date published: 2017-05-17

In De Manenschijn
type: MusicAlbum
date published: 2017-05-18

Nederlandse Kinderliedjes - De Wielen Van De Bus - In De Maneschijn
type: MusicAlbum
date published: 2017-05-18

De Wielen Van De Bus
type: MusicAlbum
date published: 2017-05-22

Hannes Loopt Op Klompen
type: MusicAlbum
date published: 2017-05-26

Hansje Pansje Kevertje
type: MusicAlbum
date published: 2017-06-02

Op Een Klein Stationnetje
type: MusicAlbum
date published: 2017-06-05

Papegaaitje Leef Je Nog
type: MusicAlbum
date published: 2017-06-08

De 20 Beste Kinderliedjes
type: MusicAlbum
date published: 2017-06-12

De 20 Beste Kinderliedjes
type: MusicAlbum
date published: 2017-06-12
track: Drie Maal Drie Is Negen
  type: MusicRecording
  duration: PT0M50S
  duration ms: 50562
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: De 20 Beste Kinderliedjes
    type: MusicAlbum
    date published: 2017-06-12
  genre: children's music
  isrc code: NLGM11700624
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-16T05:35:34+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x8b9f191b456ef0ca66654ddd23f37542cc70cd4924c9a6a9de96162b98887a2b
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958245
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958245
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700624
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-16T05:50:22Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9f191b456ef0ca66654ddd23f37542cc70cd4924c9a6a9de96162b98887a2b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700624 — a six-check JSON result.
    date published: 2026-07-16T05:50:22Z
  audio: Drie Maal Drie Is Negen
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 145.067
    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: 0.825
    additional property: Energy
      type: PropertyValue
      value: 0.457
    additional property: Speechiness
      type: PropertyValue
      value: 0.049
    additional property: Acousticness
      type: PropertyValue
      value: 0.309
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.065
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.963
    additional property: Loudness (dB)
      type: PropertyValue
      value: -9.491
    additional property: Key Name
      type: PropertyValue
      value: Bb
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Alle Eendjes Zwemmen In Het Water
  type: MusicRecording
  duration: PT0M43S
  duration ms: 43566
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: De 20 Beste Kinderliedjes
    type: MusicAlbum
    date published: 2017-06-12
  genre: children's music
  isrc code: NLGM11700629
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-03T10:33:52+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x0ca2570f607c21aab3e0cb68bf6873cba298aedddf65bc8b8ff9d31ed1fac06b
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956545
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956545
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700629
  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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca2570f607c21aab3e0cb68bf6873cba298aedddf65bc8b8ff9d31ed1fac06b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700629 — a six-check JSON result.
    date published: 2026-07-03T19:59:51Z
  audio: Alle Eendjes Zwemmen In Het Water
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 115.077
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.825
    additional property: Energy
      type: PropertyValue
      value: 0.425
    additional property: Speechiness
      type: PropertyValue
      value: 0.047
    additional property: Acousticness
      type: PropertyValue
      value: 0.227
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.001
    additional property: Liveness
      type: PropertyValue
      value: 0.088
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.799
    additional property: Loudness (dB)
      type: PropertyValue
      value: -10.801
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Berend Botje
  type: MusicRecording
  duration: PT1M9S
  duration ms: 69381
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: De 20 Beste Kinderliedjes
    type: MusicAlbum
    date published: 2017-06-12
  genre: children's music
  isrc code: NLGM11700630
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-15T07:41:59+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xe7ccdcaa1ec862dcd96fce5a18056c187327fb91ed2a053260a09f17d8b9c067
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958121
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958121
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Berend Botje
track: Hannes Loopt Op Klompen
track: Op Een Klein Stationnetje
track: Hop Hop Hop
track: Wilhelmus
track: Inne Miene Mutte

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700630

OTSTimestamp
type: PropertyValue
value: 2026-07-15T08:02:12Z

OTSVerifyInstructions
type: PropertyValue
value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ccdcaa1ec862dcd96fce5a18056c187327fb91ed2a053260a09f17d8b9c067. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700630 — a six-check JSON result.
date published: 2026-07-15T08:02:12Z

Berend Botje
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 140.031
additional property: Musical Key
  type: PropertyValue
  value: 4
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 0
additional property: Time Signature
  type: PropertyValue
  value: 3
additional property: Danceability
  type: PropertyValue
  value: 0.907
additional property: Energy
  type: PropertyValue
  value: 0.374
additional property: Speechiness
  type: PropertyValue
  value: 0.049
additional property: Acousticness
  type: PropertyValue
  value: 0.482
additional property: Instrumentalness
  type: PropertyValue
  value: 0.014
additional property: Liveness
  type: PropertyValue
  value: 0.059
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.91
additional property: Loudness (dB)
  type: PropertyValue
  value: -9.378
additional property: Key Name
  type: PropertyValue
  value: E
additional property: Mode Name
  type: PropertyValue
  value: Minor

Hannes Loopt Op Klompen
type: MusicRecording
duration: PT0M40S
duration ms: 40483
explicit: false
by artist: Kinderliedjes Loulou en Lou
in album: De 20 Beste Kinderliedjes
  type: MusicAlbum
  date published: 2017-06-12
genre: children's music
isrc code: NLGM11700628
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-04T04:21:30+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6ab06754f353dcdc570f530cb89759fe60f7e529dd37941ce4cbd1023ebac9f1
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956634
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700628
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-04T10:04:33Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab06754f353dcdc570f530cb89759fe60f7e529dd37941ce4cbd1023ebac9f1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700628 — a six-check JSON result.
  date published: 2026-07-04T10:04:33Z
audio: Hannes Loopt Op Klompen
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 100.032
  additional property: Musical Key
    type: PropertyValue
    value: 4
  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.857
  additional property: Energy
    type: PropertyValue
    value: 0.577
  additional property: Speechiness
    type: PropertyValue
    value: 0.046
  additional property: Acousticness
    type: PropertyValue
    value: 0.121
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.63
  additional property: Liveness
    type: PropertyValue
    value: 0.1
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.973
  additional property: Loudness (dB)
    type: PropertyValue
    value: -9.966
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Op Een Klein Stationnetje
type: MusicRecording
duration: PT0M37S
duration ms: 37198
explicit: false
by artist: Kinderliedjes Loulou en Lou
in album: De 20 Beste Kinderliedjes
  type: MusicAlbum
  date published: 2017-06-12
genre: children's music
isrc code: NLGM11700638
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-14T20:55:55+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x44a0643846f187ba6d06377f2b56fcaa4183dd7ee533c9660319f064aaf3f27f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958063
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958063
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700638
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-14T21:07:34Z
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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a0643846f187ba6d06377f2b56fcaa4183dd7ee533c9660319f064aaf3f27f. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700638 — a six-check JSON result.
  date published: 2026-07-14T21:07:34Z
audio: Op Een Klein Stationnetje
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 111.973
  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: 0.97
  additional property: Energy
    type: PropertyValue
    value: 0.336
  additional property: Speechiness
    type: PropertyValue
    value: 0.057
  additional property: Acousticness
    type: PropertyValue
    value: 0.566
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.004
  additional property: Liveness
    type: PropertyValue
    value: 0.124
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.905
  additional property: Loudness (dB)
    type: PropertyValue
    value: -9.226
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major

Hop Hop Hop
type: MusicRecording
duration: PT0M38S
duration ms: 38359
explicit: false
by artist: Kinderliedjes Loulou en Lou
in album: De 20 Beste Kinderliedjes
  type: MusicAlbum
  date published: 2017-06-12
genre: children's music
isrc code: NLGM11700633
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-03T23:07:23+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x414ee667d2283c1487b5f9fb0597681b4a069657855b842db9bfd2136d33cbd2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956634
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956634
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700633
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-04T10:04:33Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414ee667d2283c1487b5f9fb0597681b4a069657855b842db9bfd2136d33cbd2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700633 — a six-check JSON result.
  date published: 2026-07-04T10:04:33Z
audio: Hop Hop Hop
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 155.367
  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: 0.647
  additional property: Energy
    type: PropertyValue
    value: 0.706
  additional property: Speechiness
    type: PropertyValue
    value: 0.041
  additional property: Acousticness
    type: PropertyValue
    value: 0.708
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.248
  additional property: Liveness
    type: PropertyValue
    value: 0.24
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.968
  additional property: Loudness (dB)
    type: PropertyValue
    value: -7.439
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

Wilhelmus
type: MusicRecording
duration: PT1M30S
duration ms: 90971
explicit: false
by artist: Kinderliedjes Loulou en Lou
in album: De 20 Beste Kinderliedjes
  type: MusicAlbum
  date published: 2017-06-12
genre: children's music
isrc code: NLGM11700641
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-15T13:21:20+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xfef231559500759e7bd266ccc2bab7d082c82473b4ef02180f1910d078600516
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958163
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958163
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700641
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-15T14:38:07Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef231559500759e7bd266ccc2bab7d082c82473b4ef02180f1910d078600516. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700641 — a six-check JSON result.
  date published: 2026-07-15T14:38:07Z
audio: Wilhelmus
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 124.046
  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: 0.878
  additional property: Energy
    type: PropertyValue
    value: 0.335
  additional property: Speechiness
    type: PropertyValue
    value: 0.057
  additional property: Acousticness
    type: PropertyValue
    value: 0.111
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.029
  additional property: Liveness
    type: PropertyValue
    value: 0.07
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.785
  additional property: Loudness (dB)
    type: PropertyValue
    value: -8.425
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major

Inne Miene Mutte
type: MusicRecording
duration: PT0M34S
duration ms: 34946
explicit: false
by artist: Kinderliedjes Loulou en Lou
in album: De 20 Beste Kinderliedjes
  type: MusicAlbum
  date published: 2017-06-12
genre: children's music
isrc code: NLGM11700642
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-04T21:28:45+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc36e4a372842eda6f8edb130ac023091bc3d3f7fd41bdf8d7c72e006bfedbfc6
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956725
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956725
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700642
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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36e4a372842eda6f8edb130ac023091bc3d3f7fd41bdf8d7c72e006bfedbfc6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700642 — a six-check JSON result.
  date published: 2026-07-05T01:12:41Z
audio: Inne Miene Mutte
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 115.991
  additional property: Musical Key
    type: PropertyValue
    value: 4
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.907
  additional property: Energy
    type: PropertyValue
    value: 0.679
  additional property: Speechiness
    type: PropertyValue
    value: 0.039
  additional property: Acousticness
    type: PropertyValue
    value: 0.102
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.031
  additional property: Liveness
    type: PropertyValue
    value: 0.122
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.988
  additional property: Loudness (dB)
    type: PropertyValue
    value: -8.67
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Major

Lang Zal Ze leven
type: MusicAlbum
date published: 2017-06-16

Vader Jacob
type: MusicAlbum
date published: 2017-06-23

30 Bekende Klassieke Instrumentale Piano Liedjes Voor Kinderen
type: MusicAlbum
date published: 2017-06-24

30 Bekende Kinderliedjes Op Piano
type: MusicAlbum
date published: 2017-06-24
track: Hannes Loopt Op Klompen - Pianoversie
  type: MusicRecording
  duration: PT0M47S
  duration ms: 47042
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: 30 Bekende Kinderliedjes Op Piano
    type: MusicAlbum
    date published: 2017-06-24
  genre: children's music
  isrc code: NLGM11700692
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-19T20:48:16+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x63124c276168d72484e32d5ed84205b4ab7e3c4fcdcf04bf7633b7434c5e83a6
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958779
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958779
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700692
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-19T21:08:39Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63124c276168d72484e32d5ed84205b4ab7e3c4fcdcf04bf7633b7434c5e83a6. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700692 — a six-check JSON result.
    date published: 2026-07-19T21:08:39Z
  audio: Hannes Loopt Op Klompen - Pianoversie
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 103.479
    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: 0.535
    additional property: Energy
      type: PropertyValue
      value: 0.188
    additional property: Speechiness
      type: PropertyValue
      value: 0.07
    additional property: Acousticness
      type: PropertyValue
      value: 0.989
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.705
    additional property: Liveness
      type: PropertyValue
      value: 0.073
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.776
    additional property: Loudness (dB)
      type: PropertyValue
      value: -14.378
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Lang Zal Zij Leven - Pianoversie
  type: MusicRecording
  duration: PT0M55S
  duration ms: 55661
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: 30 Bekende Kinderliedjes Op Piano
    type: MusicAlbum
    date published: 2017-06-24
  genre: children's music
  isrc code: NLGM11700693
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-16T15:19:27+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x8ee494f8b368039b7fb35db6f3d02bf0baa052ddb079e2225f9e3140bc7e2b60
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958300
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958300
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700693
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-16T16:14:30Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee494f8b368039b7fb35db6f3d02bf0baa052ddb079e2225f9e3140bc7e2b60. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11700693 — a six-check JSON result.
    date published: 2026-07-16T16:14:30Z
  audio: Lang Zal Zij Leven - Pianoversie
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 92.222
    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: 0.633
    additional property: Energy
      type: PropertyValue
      value: 0.043
    additional property: Speechiness
      type: PropertyValue
      value: 0.079
    additional property: Acousticness
      type: PropertyValue
      value: 0.99
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.827
    additional property: Liveness
      type: PropertyValue
      value: 0.114
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.232
    additional property: Loudness (dB)
      type: PropertyValue
      value: -17.928
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major

Drie Kleine Kleutertjes
type: MusicAlbum
date published: 2017-07-14

Pianoliedjes Voor Baby's
type: MusicAlbum
date published: 2017-07-19
track: Poesje Mauw - Pianoversie
  type: MusicRecording
  duration: PT0M40S
  duration ms: 40450
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Pianoliedjes Voor Baby's
    type: MusicAlbum
    date published: 2017-07-19
  genre: children's music
  isrc code: NLGM11701055
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-20T00:09:55+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xaf2459fe0919a9dd5d23e1e5130157e43efd5a95483e2e3d526bdc33ce39d096
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958800
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958800
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11701055
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-20T00:52:19Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2459fe0919a9dd5d23e1e5130157e43efd5a95483e2e3d526bdc33ce39d096. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11701055 — a six-check JSON result.
    date published: 2026-07-20T00:52:19Z
  audio: Poesje Mauw - Pianoversie
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 115.796
    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: 0.679
    additional property: Energy
      type: PropertyValue
      value: 0.167
    additional property: Speechiness
      type: PropertyValue
      value: 0.263
    additional property: Acousticness
      type: PropertyValue
      value: 0.992
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.886
    additional property: Liveness
      type: PropertyValue
      value: 0.136
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.697
    additional property: Loudness (dB)
      type: PropertyValue
      value: -15.776
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Slaap Kindje Slaap - Pianoversie
  type: MusicRecording
  duration: PT1M3S
  duration ms: 63210
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Pianoliedjes Voor Baby's
    type: MusicAlbum
    date published: 2017-07-19
  genre: children's music
  isrc code: NLGM11701058
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-20T21:35:35+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x9b3f1629b8b67b8bb04fa3e2f4080aa40c59fba57e6780591a642796d5c78bf7
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958935
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958935
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11701058
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-20T22:08:19Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3f1629b8b67b8bb04fa3e2f4080aa40c59fba57e6780591a642796d5c78bf7. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11701058 — a six-check JSON result.
    date published: 2026-07-20T22:08:19Z
  audio: Slaap Kindje Slaap - Pianoversie
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 180.623
    additional property: Musical Key
      type: PropertyValue
      value: 9
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 3
    additional property: Danceability
      type: PropertyValue
      value: 0.344
    additional property: Energy
      type: PropertyValue
      value: 0.128
    additional property: Speechiness
      type: PropertyValue
      value: 0.05
    additional property: Acousticness
      type: PropertyValue
      value: 0.993
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.917
    additional property: Liveness
      type: PropertyValue
      value: 0.143
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.654
    additional property: Loudness (dB)
      type: PropertyValue
      value: -16.721
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Roodkapje - Pianoversie
  type: MusicRecording
  duration: PT0M57S
  duration ms: 57840
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Pianoliedjes Voor Baby's
    type: MusicAlbum
    date published: 2017-07-19
  genre: children's music
  isrc code: NLGM11701057
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T11:39:42+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xcee21a6d91d1bc4231db52728694cdef8734b3899c80aca9120a1aa0f5ba5fc8
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956822
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956822
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Roodkapje - Pianoversie
track: Happy Birthday - Pianoversie
track: Old Mcdonald Had A Farm - Pianoversie
track: Boer Wat Zeg Je Van Mijn Kippen - Pianoversie
track: De Zevensprong - Pianoversie
track: Rijen Rijen - Pianoversie
track: Row Row Row Your Boat - Pianoversie

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11701057

OTSTimestamp
type: PropertyValue
value: 2026-07-05T18:48:28Z

OTSVerifyInstructions
type: PropertyValue
value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee21a6d91d1bc4231db52728694cdef8734b3899c80aca9120a1aa0f5ba5fc8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11701057 — a six-check JSON result.
date published: 2026-07-05T18:48:28Z

Roodkapje - Pianoversie
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 93.971
additional property: Musical Key
  type: PropertyValue
  value: 11
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 1
additional property: Danceability
  type: PropertyValue
  value: 0.409
additional property: Energy
  type: PropertyValue
  value: 0.137
additional property: Speechiness
  type: PropertyValue
  value: 0.041
additional property: Acousticness
  type: PropertyValue
  value: 0.995
additional property: Instrumentalness
  type: PropertyValue
  value: 0.954
additional property: Liveness
  type: PropertyValue
  value: 0.108
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.067
additional property: Loudness (dB)
  type: PropertyValue
  value: -16.576
additional property: Key Name
  type: PropertyValue
  value: B
additional property: Mode Name
  type: PropertyValue
  value: Major

Happy Birthday - Pianoversie
type: MusicRecording
duration: PT0M58S
duration ms: 58080
explicit: false
by artist: Kinderliedjes Loulou en Lou
in album: Pianoliedjes Voor Baby's
  type: MusicAlbum
  date published: 2017-07-19
genre: children's music
isrc code: NLGM11701052
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-22T15:43:38+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5ad4c93775f1643cdcff43edb4aa4494b8d0bae4a7d14892d35b6f7df9adf4cc
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 959152
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/959152
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11701052
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-22T16:23:52Z
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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad4c93775f1643cdcff43edb4aa4494b8d0bae4a7d14892d35b6f7df9adf4cc. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11701052 — a six-check JSON result.
  date published: 2026-07-22T16:23:52Z
audio: Happy Birthday - Pianoversie
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 133.405
  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: 0.675
  additional property: Energy
    type: PropertyValue
    value: 0.039
  additional property: Speechiness
    type: PropertyValue
    value: 0.076
  additional property: Acousticness
    type: PropertyValue
    value: 0.995
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.937
  additional property: Liveness
    type: PropertyValue
    value: 0.15
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.383
  additional property: Loudness (dB)
    type: PropertyValue
    value: -19.74
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major

Old Mcdonald Had A Farm - Pianoversie
type: MusicRecording
duration: PT0M35S
duration ms: 35388
explicit: false
by artist: Kinderliedjes Loulou en Lou
in album: Pianoliedjes Voor Baby's
  type: MusicAlbum
  date published: 2017-07-19
genre: children's music
isrc code: NLGM11701053
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-22T03:40:05+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xeecce8a752637a76880b89eee0e11c0086ae30a64fb4a764e75701ad3c039d96
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 959096
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/959096
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11701053
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-22T03:48:36Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecce8a752637a76880b89eee0e11c0086ae30a64fb4a764e75701ad3c039d96. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11701053 — a six-check JSON result.
  date published: 2026-07-22T03:48:36Z
audio: Old Mcdonald Had A Farm - Pianoversie
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 132.601
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 3
  additional property: Danceability
    type: PropertyValue
    value: 0.665
  additional property: Energy
    type: PropertyValue
    value: 0.066
  additional property: Speechiness
    type: PropertyValue
    value: 0.114
  additional property: Acousticness
    type: PropertyValue
    value: 0.992
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.958
  additional property: Liveness
    type: PropertyValue
    value: 0.097
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.797
  additional property: Loudness (dB)
    type: PropertyValue
    value: -17.403
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major

Boer Wat Zeg Je Van Mijn Kippen - Pianoversie
type: MusicRecording
duration: PT0M55S
duration ms: 55900
explicit: false
by artist: Kinderliedjes Loulou en Lou
in album: Pianoliedjes Voor Baby's
  type: MusicAlbum
  date published: 2017-07-19
genre: children's music
isrc code: NLGM11701050
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-06T01:16:36+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7ed3e7e90127db5329a1a8420a83fe17cf55510e6c7f9dd14acd9b945e6468d2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956856
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956856
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11701050
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-06T01:25:57Z
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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed3e7e90127db5329a1a8420a83fe17cf55510e6c7f9dd14acd9b945e6468d2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11701050 — a six-check JSON result.
  date published: 2026-07-06T01:25:57Z
audio: Boer Wat Zeg Je Van Mijn Kippen - Pianoversie
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 173.952
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 3
  additional property: Danceability
    type: PropertyValue
    value: 0.384
  additional property: Energy
    type: PropertyValue
    value: 0.077
  additional property: Speechiness
    type: PropertyValue
    value: 0.066
  additional property: Acousticness
    type: PropertyValue
    value: 0.992
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.942
  additional property: Liveness
    type: PropertyValue
    value: 0.18
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.506
  additional property: Loudness (dB)
    type: PropertyValue
    value: -23.468
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major

De Zevensprong - Pianoversie
type: MusicRecording
duration: PT0M56S
duration ms: 56580
explicit: false
by artist: Kinderliedjes Loulou en Lou
in album: Pianoliedjes Voor Baby's
  type: MusicAlbum
  date published: 2017-07-19
genre: children's music
isrc code: NLGM11701051
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-05T23:45:12+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xbc2af6e4679ee5404f8762d50781165307ea86c63d1906b8a5071a5c4703ac01
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956856
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956856
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11701051
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-06T01:25:57Z
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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2af6e4679ee5404f8762d50781165307ea86c63d1906b8a5071a5c4703ac01. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11701051 — a six-check JSON result.
  date published: 2026-07-06T01:25:57Z
audio: De Zevensprong - Pianoversie
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 110.711
  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: 0.485
  additional property: Energy
    type: PropertyValue
    value: 0.165
  additional property: Speechiness
    type: PropertyValue
    value: 0.046
  additional property: Acousticness
    type: PropertyValue
    value: 0.993
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.928
  additional property: Liveness
    type: PropertyValue
    value: 0.09
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.503
  additional property: Loudness (dB)
    type: PropertyValue
    value: -18.773
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major

Rijen Rijen - Pianoversie
type: MusicRecording
duration: PT0M45S
duration ms: 45090
explicit: false
by artist: Kinderliedjes Loulou en Lou
in album: Pianoliedjes Voor Baby's
  type: MusicAlbum
  date published: 2017-07-19
genre: children's music
isrc code: NLGM11701056
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-04T15:42:13+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xbbcddb9ddc91dd714a071f12960c3b397890205551616a5238c99bfc5e95a60f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956725
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956725
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11701056
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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcddb9ddc91dd714a071f12960c3b397890205551616a5238c99bfc5e95a60f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11701056 — a six-check JSON result.
  date published: 2026-07-05T01:12:41Z
audio: Rijen Rijen - Pianoversie
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 106.137
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 3
  additional property: Danceability
    type: PropertyValue
    value: 0.508
  additional property: Energy
    type: PropertyValue
    value: 0.386
  additional property: Speechiness
    type: PropertyValue
    value: 0.073
  additional property: Acousticness
    type: PropertyValue
    value: 0.995
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.908
  additional property: Liveness
    type: PropertyValue
    value: 0.131
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.135
  additional property: Loudness (dB)
    type: PropertyValue
    value: -18.114
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

Row Row Row Your Boat - Pianoversie
type: MusicRecording
duration: PT0M35S
duration ms: 35280
explicit: false
by artist: Kinderliedjes Loulou en Lou
in album: Pianoliedjes Voor Baby's
  type: MusicAlbum
  date published: 2017-07-19
genre: children's music
isrc code: NLGM11701061
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-22T05:58:57+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x444296ee0373d273c009d118105f85226199d792f841acf5fe47c62360cffc6c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 959105
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/959105
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11701061
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-22T06:33:30Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444296ee0373d273c009d118105f85226199d792f841acf5fe47c62360cffc6c. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11701061 — a six-check JSON result.
  date published: 2026-07-22T06:33:30Z
audio: Row Row Row Your Boat - Pianoversie
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 126.045
  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: 0.334
  additional property: Energy
    type: PropertyValue
    value: 0.151
  additional property: Speechiness
    type: PropertyValue
    value: 0.043
  additional property: Acousticness
    type: PropertyValue
    value: 0.989
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.908
  additional property: Liveness
    type: PropertyValue
    value: 0.157
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.421
  additional property: Loudness (dB)
    type: PropertyValue
    value: -18.571
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Major

Dit Zijn Mijn Wangetjes
type: MusicAlbum
date published: 2017-07-24

Zagen Zagen
type: MusicAlbum
date published: 2017-07-28

Klassieke Muziek voor Baby, Peuters en Kleuters
type: MusicAlbum
date published: 2017-08-06

Klassieke Muziek voor Kinderen
type: MusicAlbum
date published: 2017-08-06
track: Het 'Mozart-Effect - Pianoversie
  type: MusicRecording
  duration: PT1M23S
  duration ms: 83960
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Klassieke Muziek voor Kinderen
    type: MusicAlbum
    date published: 2017-08-06
  genre: children's music
  isrc code: NLGM11701677
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-14T20:52:05+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x3c5826941840ef76953b6580447466073191a2272f46520a775c1424a144632d
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958063
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958063
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11701677
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-14T21:07:34Z
  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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5826941840ef76953b6580447466073191a2272f46520a775c1424a144632d. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11701677 — a six-check JSON result.
    date published: 2026-07-14T21:07:34Z
  audio: Het 'Mozart-Effect - Pianoversie
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 79.789
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 3
    additional property: Danceability
      type: PropertyValue
      value: 0.423
    additional property: Energy
      type: PropertyValue
      value: 0.109
    additional property: Speechiness
      type: PropertyValue
      value: 0.045
    additional property: Acousticness
      type: PropertyValue
      value: 0.995
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.9
    additional property: Liveness
      type: PropertyValue
      value: 0.107
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.514
    additional property: Loudness (dB)
      type: PropertyValue
      value: -22.909
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Ontspannende Baby Muziek - Pianoversie
  type: MusicRecording
  duration: PT0M56S
  duration ms: 56980
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Klassieke Muziek voor Kinderen
    type: MusicAlbum
    date published: 2017-08-06
  genre: children's music
  isrc code: NLGM11701676
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-04T04:07:48+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x4fa2fd50236e75c58318d8a55e804042b45dda4c81fb46a0c2a9c0e67f6da4d8
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956634
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956634
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11701676
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-04T10:04:33Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa2fd50236e75c58318d8a55e804042b45dda4c81fb46a0c2a9c0e67f6da4d8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11701676 — a six-check JSON result.
    date published: 2026-07-04T10:04:33Z
  audio: Ontspannende Baby Muziek - Pianoversie
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 82.879
    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: 0.418
    additional property: Energy
      type: PropertyValue
      value: 0.264
    additional property: Speechiness
      type: PropertyValue
      value: 0.043
    additional property: Acousticness
      type: PropertyValue
      value: 0.989
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.9
    additional property: Liveness
      type: PropertyValue
      value: 0.144
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.507
    additional property: Loudness (dB)
      type: PropertyValue
      value: -16.816
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Dromen - Pianoversie
  type: MusicRecording
  duration: PT4M6S
  duration ms: 246310
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Klassieke Muziek voor Kinderen
    type: MusicAlbum
    date published: 2017-08-06
  genre: children's music
  isrc code: NLGM11701678
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-17T10:36:32+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xa92db97d552ea975887cd8072c69fa7a91f496af06b11f72a318f83bf1f72be4
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958401
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958401
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Dromen - Pianoversie

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11701678

OTSTimestamp
type: PropertyValue
value: 2026-07-17T11:10:25Z

OTSVerifyInstructions
type: PropertyValue
value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92db97d552ea975887cd8072c69fa7a91f496af06b11f72a318f83bf1f72be4. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11701678 — a six-check JSON result.
date published: 2026-07-17T11:10:25Z

Dromen - Pianoversie
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 68.695
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: 0.393
additional property: Energy
  type: PropertyValue
  value: 0.075
additional property: Speechiness
  type: PropertyValue
  value: 0.044
additional property: Acousticness
  type: PropertyValue
  value: 0.978
additional property: Instrumentalness
  type: PropertyValue
  value: 0.93
additional property: Liveness
  type: PropertyValue
  value: 0.081
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.082
additional property: Loudness (dB)
  type: PropertyValue
  value: -25.697
additional property: Key Name
  type: PropertyValue
  value: C
additional property: Mode Name
  type: PropertyValue
  value: Minor

Altijd Is Kortjakje Ziek
type: MusicAlbum
date published: 2017-08-08

Poesje Mauw
type: MusicAlbum
date published: 2017-08-14

Poesje Mauw
type: MusicAlbum
date published: 2017-08-14

Kinderliedjes Loulou en Lou
type: MusicAlbum
date published: 2017-09-08

De Zevensprong
type: MusicAlbum
date published: 2017-09-18

Dierendag
type: MusicAlbum
date published: 2017-09-21

Dierendag
type: MusicAlbum
date published: 2017-09-21

Sinterklaasliedjes Loulou & Lou (Piano Versie)
type: MusicAlbum
date published: 2017-10-09

Sinterklaasliedjes Op Piano
type: MusicAlbum
date published: 2017-10-09

De 50 Beste Kinderliedjes
type: MusicAlbum
date published: 2017-10-10

De 50 Beste Kinderliedjes
type: MusicAlbum
date published: 2017-10-10
track: Vader Jacob
  type: MusicRecording
  duration: PT0M46S
  duration ms: 46207
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: De 50 Beste Kinderliedjes
    type: MusicAlbum
    date published: 2017-10-10
  genre: children's music
  isrc code: NLGM11704200
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-12T13:41:03+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x0e330434c04bd7767b4477d57ab9cde36e51268a1886c12c870acf99aea19218
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957709
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957709
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11704200
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-12T13:52:43Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e330434c04bd7767b4477d57ab9cde36e51268a1886c12c870acf99aea19218. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11704200 — a six-check JSON result.
    date published: 2026-07-12T13:52:43Z
  audio: Vader Jacob
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 150.23
    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: 0.764
    additional property: Energy
      type: PropertyValue
      value: 0.634
    additional property: Speechiness
      type: PropertyValue
      value: 0.033
    additional property: Acousticness
      type: PropertyValue
      value: 0.576
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.1
    additional property: Liveness
      type: PropertyValue
      value: 0.129
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.967
    additional property: Loudness (dB)
      type: PropertyValue
      value: -7.361
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Zagen Zagen
  type: MusicRecording
  duration: PT0M48S
  duration ms: 48332
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: De 50 Beste Kinderliedjes
    type: MusicAlbum
    date published: 2017-10-10
  genre: children's music
  isrc code: NLGM11704144
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-21T21:05:07+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xd8af8768a9006ecbcc4329141bb0515f49482104248f4298a937e8b5b53cc685
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 959061
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/959061
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11704144
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-21T21:34:21Z
  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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8af8768a9006ecbcc4329141bb0515f49482104248f4298a937e8b5b53cc685. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11704144 — a six-check JSON result.
    date published: 2026-07-21T21:34:21Z
  audio: Zagen Zagen
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 146.987
    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: 0.731
    additional property: Energy
      type: PropertyValue
      value: 0.797
    additional property: Speechiness
      type: PropertyValue
      value: 0.042
    additional property: Acousticness
      type: PropertyValue
      value: 0.136
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.011
    additional property: Liveness
      type: PropertyValue
      value: 0.082
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.97
    additional property: Loudness (dB)
      type: PropertyValue
      value: -8.495
    additional property: Key Name
      type: PropertyValue
      value: Bb
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: De Mosselman
  type: MusicRecording
  duration: PT0M54S
  duration ms: 54255
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: De 50 Beste Kinderliedjes
    type: MusicAlbum
    date published: 2017-10-10
  genre: children's music
  isrc code: NLGM11704189
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-14T20:24:05+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x648d451cb3c8b8402893355ef95bf5235b061d9f0ff405629a24929976e9ba3e
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958060
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958060
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: De Mosselman
track: Altijd Is Kortjakje Ziek - Alternatieve Versie

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11704189

OTSTimestamp
type: PropertyValue
value: 2026-07-14T20:39:42Z

OTSVerifyInstructions
type: PropertyValue
value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648d451cb3c8b8402893355ef95bf5235b061d9f0ff405629a24929976e9ba3e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11704189 — a six-check JSON result.
date published: 2026-07-14T20:39:42Z

De Mosselman
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 188.057
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: 0.759
additional property: Energy
  type: PropertyValue
  value: 0.607
additional property: Speechiness
  type: PropertyValue
  value: 0.046
additional property: Acousticness
  type: PropertyValue
  value: 0.365
additional property: Instrumentalness
  type: PropertyValue
  value: 0.006
additional property: Liveness
  type: PropertyValue
  value: 0.098
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.969
additional property: Loudness (dB)
  type: PropertyValue
  value: -8.416
additional property: Key Name
  type: PropertyValue
  value: F
additional property: Mode Name
  type: PropertyValue
  value: Major

Altijd Is Kortjakje Ziek - Alternatieve Versie
type: MusicRecording
duration: PT0M51S
duration ms: 51502
explicit: false
by artist: Kinderliedjes Loulou en Lou
in album: De 50 Beste Kinderliedjes
  type: MusicAlbum
  date published: 2017-10-10
genre: children's music
isrc code: NLGM11704183
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-19T06:26:31+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x25483f758696f74182840c582f3eb2efa405db503495a0e22f73cc7880bba3ce
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958690
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958690
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11704183
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-19T07:14:39Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25483f758696f74182840c582f3eb2efa405db503495a0e22f73cc7880bba3ce. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11704183 — a six-check JSON result.
  date published: 2026-07-19T07:14:39Z
audio: Altijd Is Kortjakje Ziek - Alternatieve Versie
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 135.895
  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: 0.863
  additional property: Energy
    type: PropertyValue
    value: 0.313
  additional property: Speechiness
    type: PropertyValue
    value: 0.047
  additional property: Acousticness
    type: PropertyValue
    value: 0.754
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.002
  additional property: Liveness
    type: PropertyValue
    value: 0.12
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.948
  additional property: Loudness (dB)
    type: PropertyValue
    value: -14.805
  additional property: Key Name
    type: PropertyValue
    value: Eb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Halloween
type: MusicAlbum
date published: 2017-10-18

Rood Kapje
type: MusicAlbum
date published: 2017-10-20

Slaap Kindje Slaap
type: MusicAlbum
date published: 2017-10-20

Ik Heb Een Stuiver
type: MusicAlbum
date published: 2017-10-20

Sinterklaasje Bonne Bonne Bone
type: MusicAlbum
date published: 2017-11-07

Sinterklaasliedjes
type: MusicAlbum
date published: 2017-11-09

Rijen Rijen Rijen In Een Wagentje
type: MusicAlbum
date published: 2017-11-10

Rijen Rijen Rijen In Een Wagentje
type: MusicAlbum
date published: 2017-11-10

Kerstliedjes Op Piano
type: MusicAlbum
date published: 2017-11-12

Rock Sinterklaasliedjes
type: MusicAlbum
date published: 2017-11-25

Zo Gaat De Molen
type: MusicAlbum
date published: 2017-12-01

De Beste Loulou en Lou Kinderliedjes
type: MusicAlbum
date published: 2018-01-04

De Beste Paasliedjes
type: MusicAlbum
date published: 2018-03-16

De Beste Paasliedjes
type: MusicAlbum
date published: 2018-03-16

Kinderliedjes van Vroeger
type: MusicAlbum
date published: 2018-05-09

Kinderliedjes van Vroeger
type: MusicAlbum
date published: 2018-05-09
track: Ik Heb Een Stuiver
  type: MusicRecording
  duration: PT1M7S
  duration ms: 67720
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Kinderliedjes van Vroeger
    type: MusicAlbum
    date published: 2018-05-09
  genre: children's music
  isrc code: NLGM11807319
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-06T01:29:08+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xe6bc39b5101da31e485cea1245d69ad1880483bbf3f951c6e18516493b404eb3
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956856
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956856
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11807319
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-06T01:25:57Z
  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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bc39b5101da31e485cea1245d69ad1880483bbf3f951c6e18516493b404eb3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11807319 — a six-check JSON result.
    date published: 2026-07-06T01:25:57Z
  audio: Ik Heb Een Stuiver
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 100.028
    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: 0.816
    additional property: Energy
      type: PropertyValue
      value: 0.268
    additional property: Speechiness
      type: PropertyValue
      value: 0.069
    additional property: Acousticness
      type: PropertyValue
      value: 0.512
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.478
    additional property: Liveness
      type: PropertyValue
      value: 0.111
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.327
    additional property: Loudness (dB)
      type: PropertyValue
      value: -14.812
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Kinderfeestje met Loulou en Lou
type: MusicAlbum
date published: 2018-05-26

Kinderfeestje
type: MusicAlbum
date published: 2018-05-26
track: Altijd Is Kortjakje Ziek - Rockversie
  type: MusicRecording
  duration: PT1M2S
  duration ms: 62403
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Kinderfeestje
    type: MusicAlbum
    date published: 2018-05-26
  genre: children's music
  isrc code: NLGM11807986
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-17T00:32:17+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xb98eb96e04622a6fca388017cda69f71cf376080a5af1fc09714cb60dbea2371
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958341
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958341
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11807986
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-17T01:08:10Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98eb96e04622a6fca388017cda69f71cf376080a5af1fc09714cb60dbea2371. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11807986 — a six-check JSON result.
    date published: 2026-07-17T01:08:10Z
  audio: Altijd Is Kortjakje Ziek - Rockversie
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 95.015
    additional property: Musical Key
      type: PropertyValue
      value: 10
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.907
    additional property: Energy
      type: PropertyValue
      value: 0.503
    additional property: Speechiness
      type: PropertyValue
      value: 0.058
    additional property: Acousticness
      type: PropertyValue
      value: 0.304
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.119
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.967
    additional property: Loudness (dB)
      type: PropertyValue
      value: -12.22
    additional property: Key Name
      type: PropertyValue
      value: Bb
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Piano Liedjes Loulou & Lou
type: MusicAlbum
date published: 2018-06-30

Pianoliedjes Loulou & Lou
type: MusicAlbum
date published: 2018-06-30
track: Koning Lou - Pianoversie
  type: MusicRecording
  duration: PT1M47S
  duration ms: 107395
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Pianoliedjes Loulou & Lou
    type: MusicAlbum
    date published: 2018-06-30
  genre: children's music
  isrc code: NLGM11809399
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-14T20:49:12+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xf4d7a60d625093ced567bfcc2f79d7cc878c6077ddda355965c343655f2d6f3a
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958063
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958063
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11809399
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-14T21:07:34Z
  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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d7a60d625093ced567bfcc2f79d7cc878c6077ddda355965c343655f2d6f3a. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11809399 — a six-check JSON result.
    date published: 2026-07-14T21:07:34Z
  audio: Koning Lou - Pianoversie
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 125.824
    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: 0.646
    additional property: Energy
      type: PropertyValue
      value: 0.022
    additional property: Speechiness
      type: PropertyValue
      value: 0.082
    additional property: Acousticness
      type: PropertyValue
      value: 0.996
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.95
    additional property: Liveness
      type: PropertyValue
      value: 0.162
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.724
    additional property: Loudness (dB)
      type: PropertyValue
      value: -27.352
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Major

Het Is Vakantie
type: MusicAlbum
date published: 2018-07-01

De Mosselman
type: MusicAlbum
date published: 2018-07-08

Sint Maarten Liedjes
type: MusicAlbum
date published: 2018-10-07
track: 11 November
  type: MusicRecording
  duration: PT1M7S
  duration ms: 67764
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Sint Maarten Liedjes
    type: MusicAlbum
    date published: 2018-10-07
  genre: children's music
  isrc code: NLGM11814630
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-12T13:28:50+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x01dc6068b08865e1c9c296f623c5b30954aa5ff5640ee84e74a96ccadbd841c4
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957796
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957796
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11814630
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-13T03:24:42Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01dc6068b08865e1c9c296f623c5b30954aa5ff5640ee84e74a96ccadbd841c4. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11814630 — a six-check JSON result.
    date published: 2026-07-13T03:24:42Z
  audio: 11 November
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 170.179
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 3
    additional property: Danceability
      type: PropertyValue
      value: 0.674
    additional property: Energy
      type: PropertyValue
      value: 0.268
    additional property: Speechiness
      type: PropertyValue
      value: 0.034
    additional property: Acousticness
      type: PropertyValue
      value: 0.703
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.04
    additional property: Liveness
      type: PropertyValue
      value: 0.114
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.932
    additional property: Loudness (dB)
      type: PropertyValue
      value: -13.32
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Ik Heb Een Lichtje In Mijn Hand
  type: MusicRecording
  duration: PT0M57S
  duration ms: 57272
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Sint Maarten Liedjes
    type: MusicAlbum
    date published: 2018-10-07
  genre: children's music
  isrc code: NLGM11814632
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-21T21:00:23+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x98ef14c5bded9db2690d0d32297d002c711847130ee4aae877c24517a5b63e64
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 959058
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/959058
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11814632
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-21T21:09:36Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ef14c5bded9db2690d0d32297d002c711847130ee4aae877c24517a5b63e64. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11814632 — a six-check JSON result.
    date published: 2026-07-21T21:09:36Z
  audio: Ik Heb Een Lichtje In Mijn Hand
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 131.983
    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: 0.828
    additional property: Energy
      type: PropertyValue
      value: 0.484
    additional property: Speechiness
      type: PropertyValue
      value: 0.055
    additional property: Acousticness
      type: PropertyValue
      value: 0.308
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.68
    additional property: Liveness
      type: PropertyValue
      value: 0.135
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.526
    additional property: Loudness (dB)
      type: PropertyValue
      value: -11.859
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major

Sinterklaas Is Jarig
type: MusicAlbum
date published: 2018-10-30

De Leukste Sinterklaasliedjes
type: MusicAlbum
date published: 2018-11-04

Pepernoten Blues
type: MusicAlbum
date published: 2018-11-07

Dag Sinterklaasje
type: MusicAlbum
date published: 2018-11-10

Sinterklaasliedjes
type: MusicAlbum
date published: 2018-11-11

De Leukste Sinterklaasliedjes
type: MusicAlbum
date published: 2018-11-15

Jongens Heb Je Het Al Vernomen
type: MusicAlbum
date published: 2018-11-16

Sinterklaasje Kom Maar Binnen
type: MusicAlbum
date published: 2018-11-17

De Leukste Kerst Hits
type: MusicAlbum
date published: 2018-11-20

Sinterklaas Is Verdwenen
type: MusicAlbum
date published: 2018-11-20

Zie Ginds Komt De Stoomboot
type: MusicAlbum
date published: 2018-11-21

Sinterklaasje Bonne Bonne Bonne
type: MusicAlbum
date published: 2018-11-22

Hij Komt Hij Komt Die Goede Lieve Sint
type: MusicAlbum
date published: 2018-11-23

Zie De Maan Schijnt Door De Bomen
type: MusicAlbum
date published: 2018-11-24

Sinterklaas Kapoentje
type: MusicAlbum
date published: 2018-11-25

Sinterklaas Die Goede Heer
type: MusicAlbum
date published: 2018-11-26

Hoor Wie Klopt Daar Kinderen
type: MusicAlbum
date published: 2018-11-27

Daar Wordt Aan De Deur Geklopt
type: MusicAlbum
date published: 2018-11-28

Hoor De Wind Waait Door De Bomen
type: MusicAlbum
date published: 2018-11-29

Dikke Piet Ging Uit Fietsen
type: MusicAlbum
date published: 2018-12-01

O Kom Maar Eens Kijken
type: MusicAlbum
date published: 2018-12-03

Rustige Kerstliedjes
type: MusicAlbum
date published: 2018-12-06
track: Kling Klokje Klingelingeling
  type: MusicRecording
  duration: PT0M51S
  duration ms: 51111
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Rustige Kerstliedjes
    type: MusicAlbum
    date published: 2018-12-06
  genre: children's music
  isrc code: NLGM11818544
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-18T12:39:50+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xbd6a763d0f24075c78edeeeb94292436fc21ef1977f067ed45d50e5c0e8b0511
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958547
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958547
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11818544
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-18T12:44:05Z
  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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6a763d0f24075c78edeeeb94292436fc21ef1977f067ed45d50e5c0e8b0511. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11818544 — a six-check JSON result.
    date published: 2026-07-18T12:44:05Z
  audio: Kling Klokje Klingelingeling
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 131.678
    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: 0.516
    additional property: Energy
      type: PropertyValue
      value: 0.125
    additional property: Speechiness
      type: PropertyValue
      value: 0.051
    additional property: Acousticness
      type: PropertyValue
      value: 0.99
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.58
    additional property: Liveness
      type: PropertyValue
      value: 0.117
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.71
    additional property: Loudness (dB)
      type: PropertyValue
      value: -15.772
    additional property: Key Name
      type: PropertyValue
      value: Bb
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: De Herdertjes Lagen Bij Nachte
  type: MusicRecording
  duration: PT2M5S
  duration ms: 125424
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Rustige Kerstliedjes
    type: MusicAlbum
    date published: 2018-12-06
  genre: children's music
  isrc code: NLGM11818542
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T19:25:35+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x7e37f40627283cfae4d11ae139d6c059462e4ef86a8f26db8ad62b7cbfc3a9d9
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956826
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956826
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11818542
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-05T19:27:56Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e37f40627283cfae4d11ae139d6c059462e4ef86a8f26db8ad62b7cbfc3a9d9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11818542 — a six-check JSON result.
    date published: 2026-07-05T19:27:56Z
  audio: De Herdertjes Lagen Bij Nachte
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 94.274
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 3
    additional property: Danceability
      type: PropertyValue
      value: 0.435
    additional property: Energy
      type: PropertyValue
      value: 0.108
    additional property: Speechiness
      type: PropertyValue
      value: 0.037
    additional property: Acousticness
      type: PropertyValue
      value: 0.989
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.157
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.53
    additional property: Loudness (dB)
      type: PropertyValue
      value: -14.017
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Major

Rudolph Het Rare Rendier
type: MusicAlbum
date published: 2018-12-12

Het Is Kerstvakantie
type: MusicAlbum
date published: 2018-12-15

Rudolph Het Rare Rendier
type: MusicAlbum
date published: 2018-12-17

Kling Klokje Klingelingeling
type: MusicAlbum
date published: 2018-12-18

Laat De Kerstman Komen
type: MusicAlbum
date published: 2018-12-20

O Denneboom
type: MusicAlbum
date published: 2018-12-21

De Leukste Nieuwjaarsliedjes
type: MusicAlbum
date published: 2018-12-21

Stille Nacht
type: MusicAlbum
date published: 2018-12-22

Kerstfeest
type: MusicAlbum
date published: 2018-12-22

Stille Nacht Heilige Nacht
type: MusicAlbum
date published: 2018-12-24

Nieuwjaarsliedjes
type: MusicAlbum
date published: 2018-12-26

Driekoningenliedjes
type: MusicAlbum
date published: 2018-12-29

Drie Koningen, Geef Mij Een Nieuwe Hoed
type: MusicAlbum
date published: 2019-01-09

Zou Jij M'n Valentijn Willen Zijn
type: MusicAlbum
date published: 2019-01-15

Liedjes Voor Valentijnsdag
type: MusicAlbum
date published: 2019-01-16

Valentijn O Valentijn
type: MusicAlbum
date published: 2019-01-18

Sjansen
type: MusicAlbum
date published: 2019-01-22

Koning Winter
type: MusicAlbum
date published: 2019-01-24

Ik Zag Een Olifantje
type: MusicAlbum
date published: 2019-01-25

Ik Ben Op Jou
type: MusicAlbum
date published: 2019-01-29

Het Liefdesliedje
type: MusicAlbum
date published: 2019-02-05

14 Februari Valentijn
type: MusicAlbum
date published: 2019-02-08

Carnavalsliedjes
type: MusicAlbum
date published: 2019-03-01
track: Hela Hela Holala - Hondje Van De Bakker
  type: MusicRecording
  duration: PT0M58S
  duration ms: 58775
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Carnavalsliedjes
    type: MusicAlbum
    date published: 2019-03-01
  genre: children's music
  isrc code: NLGM11906502
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-15T05:14:06+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x8abedb85a614b98b02cfee9a4fd0fee892733df21d2809d1a47705aedd8fda26
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958104
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958104
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11906502
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-15T05:34:05Z
  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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abedb85a614b98b02cfee9a4fd0fee892733df21d2809d1a47705aedd8fda26. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11906502 — a six-check JSON result.
    date published: 2026-07-15T05:34:05Z
  audio: Hela Hela Holala - Hondje Van De Bakker
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 147.158
    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: 0.727
    additional property: Energy
      type: PropertyValue
      value: 0.423
    additional property: Speechiness
      type: PropertyValue
      value: 0.106
    additional property: Acousticness
      type: PropertyValue
      value: 0.426
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.085
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.958
    additional property: Loudness (dB)
      type: PropertyValue
      value: -11.649
    additional property: Key Name
      type: PropertyValue
      value: B
    additional property: Mode Name
      type: PropertyValue
      value: Major

Paasliedjes
type: MusicAlbum
date published: 2019-03-30
track: Eitje Verstoppen
  type: MusicRecording
  duration: PT0M45S
  duration ms: 45375
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Paasliedjes
    type: MusicAlbum
    date published: 2019-03-30
  genre: children's music
  isrc code: NLGM11907782
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-21T23:34:44+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xf5b6ea4cdcbd9b2338f093604a74e4495253361b2b3f65a34f04d9d9d81cc87a
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 959080
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/959080
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11907782
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-22T00:07:05Z
  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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b6ea4cdcbd9b2338f093604a74e4495253361b2b3f65a34f04d9d9d81cc87a. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11907782 — a six-check JSON result.
    date published: 2026-07-22T00:07:05Z
  audio: Eitje Verstoppen
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 160.065
    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: 0.846
    additional property: Energy
      type: PropertyValue
      value: 0.38
    additional property: Speechiness
      type: PropertyValue
      value: 0.06
    additional property: Acousticness
      type: PropertyValue
      value: 0.589
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.097
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.979
    additional property: Loudness (dB)
      type: PropertyValue
      value: -12.114
    additional property: Key Name
      type: PropertyValue
      value: Bb
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Het Dierenbos
  type: MusicRecording
  duration: PT1M14S
  duration ms: 74021
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Paasliedjes
    type: MusicAlbum
    date published: 2019-03-30
  genre: children's music
  isrc code: NLGM11907784
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-03T10:38:44+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xd15a0e626fe40567a7101aec1b7f062efcd8ff9aa1e0738b65042bee1fdf84bf
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956545
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956545
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11907784
  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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15a0e626fe40567a7101aec1b7f062efcd8ff9aa1e0738b65042bee1fdf84bf. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11907784 — a six-check JSON result.
    date published: 2026-07-03T19:59:51Z
  audio: Het Dierenbos
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 91.987
    additional property: Musical Key
      type: PropertyValue
      value: 8
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.687
    additional property: Energy
      type: PropertyValue
      value: 0.407
    additional property: Speechiness
      type: PropertyValue
      value: 0.051
    additional property: Acousticness
      type: PropertyValue
      value: 0.514
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.11
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.498
    additional property: Loudness (dB)
      type: PropertyValue
      value: -13.424
    additional property: Key Name
      type: PropertyValue
      value: Ab
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Lente Geuren Voorjaars Kleuren
  type: MusicRecording
  duration: PT1M5S
  duration ms: 65004
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Paasliedjes
    type: MusicAlbum
    date published: 2019-03-30
  genre: children's music
  isrc code: NLGM11907801
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-03T14:18:05+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xd62f48693d3609ce6533b5d332ce70163ce07f93e44452aad783d63cebea0078
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956545
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956545
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Lente Geuren Voorjaars Kleuren

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11907801

OTSTimestamp
type: PropertyValue
value: 2026-07-03T19:59:51Z

OTSVerifyInstructions
type: PropertyValue
value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62f48693d3609ce6533b5d332ce70163ce07f93e44452aad783d63cebea0078. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11907801 — a six-check JSON result.
date published: 2026-07-03T19:59:51Z

Lente Geuren Voorjaars Kleuren
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 112.054
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: 0.737
additional property: Energy
  type: PropertyValue
  value: 0.205
additional property: Speechiness
  type: PropertyValue
  value: 0.051
additional property: Acousticness
  type: PropertyValue
  value: 0.976
additional property: Instrumentalness
  type: PropertyValue
  value: 0.039
additional property: Liveness
  type: PropertyValue
  value: 0.11
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.286
additional property: Loudness (dB)
  type: PropertyValue
  value: -15.599
additional property: Key Name
  type: PropertyValue
  value: D
additional property: Mode Name
  type: PropertyValue
  value: Major

Mijn Vriendin De Kip
type: MusicAlbum
date published: 2019-04-12

Mevrouw De Haas
type: MusicAlbum
date published: 2019-04-14

Babe De Big
type: MusicAlbum
date published: 2019-04-16

Twiet Twiet Twiet
type: MusicAlbum
date published: 2019-05-01

Lenteliedjes en Dierenliedjes
type: MusicAlbum
date published: 2019-05-01
track: Vijf Kleine Kikkertjes
  type: MusicRecording
  duration: PT1M45S
  duration ms: 105000
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Lenteliedjes en Dierenliedjes
    type: MusicAlbum
    date published: 2019-05-01
  genre: children's music
  isrc code: NLGM11909791
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-12T15:13:45+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x172a039eca6c65e5b781e12d0b8ad50743d456491b4d12078134584c5d5868ff
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957720
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957720
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11909791
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-12T15:26:09Z
  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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172a039eca6c65e5b781e12d0b8ad50743d456491b4d12078134584c5d5868ff. Chain 2 (Bitcoin): anchored in block 957720 (2026-07-12T15:26:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11909791 — a six-check JSON result.
    date published: 2026-07-12T15:26:09Z
  audio: Vijf Kleine Kikkertjes
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 100.121
    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: 0.939
    additional property: Energy
      type: PropertyValue
      value: 0.341
    additional property: Speechiness
      type: PropertyValue
      value: 0.09
    additional property: Acousticness
      type: PropertyValue
      value: 0.468
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.101
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.975
    additional property: Loudness (dB)
      type: PropertyValue
      value: -12.32
    additional property: Key Name
      type: PropertyValue
      value: F#
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Er Is Er Één Jarig
  type: MusicRecording
  duration: PT1M16S
  duration ms: 76666
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Lenteliedjes en Dierenliedjes
    type: MusicAlbum
    date published: 2019-05-01
  genre: children's music
  isrc code: NLGM11909793
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-14T21:05:44+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x21ac9eb747c658b591d9fff3a4997f8e6543b3d3f6391fa9fcde39b0ed9f2ac1
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958067
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958067
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11909793
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-14T21:26:15Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ac9eb747c658b591d9fff3a4997f8e6543b3d3f6391fa9fcde39b0ed9f2ac1. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11909793 — a six-check JSON result.
    date published: 2026-07-14T21:26:15Z
  audio: Er Is Er Één Jarig
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 135.028
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 3
    additional property: Danceability
      type: PropertyValue
      value: 0.753
    additional property: Energy
      type: PropertyValue
      value: 0.356
    additional property: Speechiness
      type: PropertyValue
      value: 0.031
    additional property: Acousticness
      type: PropertyValue
      value: 0.639
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.007
    additional property: Liveness
      type: PropertyValue
      value: 0.092
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.783
    additional property: Loudness (dB)
      type: PropertyValue
      value: -11.25
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Major

Moederdag en Vaderdag
type: MusicAlbum
date published: 2019-05-06
track: Er Is Er Één Jarig
  type: MusicRecording
  duration: PT1M16S
  duration ms: 76666
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Moederdag en Vaderdag
    type: MusicAlbum
    date published: 2019-05-06
  genre: children's music
  isrc code: NLGM11911725
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-03T14:42:08+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x3b09cb657832e62ca300a4400f0ae65754b1e2311d6837c34700ae29a722d42f
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956551
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956551
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11911725
  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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b09cb657832e62ca300a4400f0ae65754b1e2311d6837c34700ae29a722d42f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11911725 — a six-check JSON result.
    date published: 2026-07-03T21:18:05Z
  audio: Er Is Er Één Jarig
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 135.028
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 3
    additional property: Danceability
      type: PropertyValue
      value: 0.753
    additional property: Energy
      type: PropertyValue
      value: 0.356
    additional property: Speechiness
      type: PropertyValue
      value: 0.031
    additional property: Acousticness
      type: PropertyValue
      value: 0.639
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.007
    additional property: Liveness
      type: PropertyValue
      value: 0.092
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.783
    additional property: Loudness (dB)
      type: PropertyValue
      value: -11.25
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Major

Moederdag
type: MusicAlbum
date published: 2019-05-06

Vier Kleine Visjes
type: MusicAlbum
date published: 2019-05-07

Paardjes Krijgen Veulens
type: MusicAlbum
date published: 2019-05-15

Vijf Kleine Kikkertjes
type: MusicAlbum
date published: 2019-05-21

Vaderdag
type: MusicAlbum
date published: 2019-05-30

Het Dierenbos
type: MusicAlbum
date published: 2019-06-01

Mijn Papa Is Een Kei
type: MusicAlbum
date published: 2019-06-02

Er Is Er Één Jarig
type: MusicAlbum
date published: 2019-06-07

Mijn Vader Is de Sterkste
type: MusicAlbum
date published: 2019-06-09

Lente Geuren Voorjaars Kleuren
type: MusicAlbum
date published: 2019-06-21

De Leukste Salsamuziek Op Trompet
type: MusicAlbum
date published: 2019-07-07

Salsamuziek Voor Kinderen
type: MusicAlbum
date published: 2019-07-21
track: Als Je Blij Bent Ja Dan Klap Je In Je Handen - Salsaversie
  type: MusicRecording
  duration: PT0M50S
  duration ms: 50460
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Salsamuziek Voor Kinderen
    type: MusicAlbum
    date published: 2019-07-21
  genre: children's music
  isrc code: NLGM11926581
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-20T21:32:44+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x2113a0a16751886e3ddcba85e50e4b4633fb96bb581dbabbf1f897ec6d42b841
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958935
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958935
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11926581
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-20T22:08:19Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2113a0a16751886e3ddcba85e50e4b4633fb96bb581dbabbf1f897ec6d42b841. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11926581 — a six-check JSON result.
    date published: 2026-07-20T22:08:19Z
  audio: Als Je Blij Bent Ja Dan Klap Je In Je Handen - Salsaversie
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 146.14
    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: 0.762
    additional property: Energy
      type: PropertyValue
      value: 0.746
    additional property: Speechiness
      type: PropertyValue
      value: 0.055
    additional property: Acousticness
      type: PropertyValue
      value: 0.795
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.051
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.978
    additional property: Loudness (dB)
      type: PropertyValue
      value: -7.791
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: ABC - Salsaversie
  type: MusicRecording
  duration: PT1M19S
  duration ms: 79215
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Salsamuziek Voor Kinderen
    type: MusicAlbum
    date published: 2019-07-21
  genre: children's music
  isrc code: NLGM11926583
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-21T00:26:17+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x66ace82e3f446aa47aebb50ff5e1ec670fbe7a18b5d22c6df24101a809160521
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958945
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958945
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11926583
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-21T00:35:28Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ace82e3f446aa47aebb50ff5e1ec670fbe7a18b5d22c6df24101a809160521. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11926583 — a six-check JSON result.
    date published: 2026-07-21T00:35:28Z
  audio: ABC - Salsaversie
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 76.437
    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: 0.806
    additional property: Energy
      type: PropertyValue
      value: 0.341
    additional property: Speechiness
      type: PropertyValue
      value: 0.075
    additional property: Acousticness
      type: PropertyValue
      value: 0.563
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.095
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.928
    additional property: Loudness (dB)
      type: PropertyValue
      value: -11.469
    additional property: Key Name
      type: PropertyValue
      value: G
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Vader Jacob - Salsaversie
  type: MusicRecording
  duration: PT0M37S
  duration ms: 37762
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Salsamuziek Voor Kinderen
    type: MusicAlbum
    date published: 2019-07-21
  genre: children's music
  isrc code: NLGM11926593
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-18T12:06:31+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xb1beb06d97c70ba39cb5781d08d53b61d026d41730e618af9f739a43a2b9b8cb
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958547
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958547
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Vader Jacob - Salsaversie

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11926593

OTSTimestamp
type: PropertyValue
value: 2026-07-18T12:44:05Z

OTSVerifyInstructions
type: PropertyValue
value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
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date published: 2026-07-18T12:44:05Z

Vader Jacob - Salsaversie
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De Brug Van London
type: MusicAlbum
date published: 2019-10-07

Mieke Heeft Een Lammetje
type: MusicAlbum
date published: 2022-04-18

Kalm Als De Maan
type: MusicAlbum
date published: 2022-04-29

We Plukken De Dag
type: MusicAlbum
date published: 2022-05-06

Ukkepuk
type: MusicAlbum
date published: 2022-05-11

Nooit Alleen
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date published: 2022-05-20

Kalm Als De Maan
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date published: 2022-05-24

De Wielen Van De Bus
type: MusicAlbum
date published: 2022-05-27

Humpty Dumpty
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date published: 2022-06-03

Doggy Rae en Funky Lou
type: MusicAlbum
date published: 2022-06-10

Disco Sinterklaasliedjes
type: MusicAlbum
date published: 2022-10-14

De leukste Sinterklaasliedjes in alle Stijlen
type: MusicAlbum
date published: 2022-11-04

Reggae Muziek Voor Kinderen
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date published: 2023-02-09

De Paashaas Hopt In Het Rond
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date published: 2023-03-27

De Leukste Dierenliedjes
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date published: 2023-04-07

De Leukste Kinderliedjes! In Alle Muziekstijlen
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-15T23:24:33Z
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Hallo Meneer De Uil
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date published: 2023-08-01

De Leukste Salsa Muziek Voor Kinderen
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date published: 2023-08-01

Vijf Kleine Kikkertjes
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date published: 2023-08-05

Kabouterdans
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date published: 2023-08-10

Ik Ben Vandaag Zo Vrolijk
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date published: 2023-08-20

Gitaarliedjes voor Kinderen
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date published: 2023-08-25

De Mosselman
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date published: 2023-10-15

Naar De Disco Met Loulou & Lou
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date published: 2023-11-01

Vijf Kleine Eendjes
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date published: 2023-11-01

De Leukste Sinterklaasliedjes
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date published: 2023-11-17

De Leukste Sinterklaasliedjes (medley)
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date published: 2023-11-24

Hoofd Schouders Knie En Teen
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date published: 2023-12-31

De Swingende Muziekband
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-05T18:48:28Z
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track: De Droomboom
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-17T19:12:23Z
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Eitje Verstoppen
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date published: 2024-03-01

Het Is Weer Pasen
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Loulou & Lou en de Swingende Muziekband
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De Leukste Hits: Kinderliedjes In Alle Stijlen
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date published: 2024-07-12

Dikkertje Dap
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date published: 2024-07-19

De Leukste Kinderliedjes van Annie MG Schmidt
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date published: 2024-07-26

Als je van beren leren kan
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date published: 2024-09-25

Wie is er bang voor de boze wolf
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Loulou & Lou en de Swingende Sinterklaasband
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date published: 2024-11-06

De Leukste Sinterklaasliedjes van 2024
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De Leukste Hits: Kinderliedjes In Alle Stijlen
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Loulou & Lou En De Swingende Sprookjeswereld
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Boogie Beer
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Cowboy Billie Boem
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De Leukste Lieve Liedjes voor Kleuters
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date published: 2025-03-28

De Mosselman
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date published: 2025-06-06

Hokey Pokey
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De Wielen Van De Bus
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Latin Grooves voor Kinderen
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Klap Eens In Je Handjes
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  additional property: OTSVerificationAPI
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  additional property: OTSTimestamp
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  additional property: OTSVerifyInstructions
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    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-05T01:12:41Z
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De Leukste Lieve Liedjes voor Peuters
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De Autobus
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Dit Zijn Mijn Wangetjes
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Muziek voor Jonge Kinderen op School en Thuis
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  additional property: OTSVerifyInstructions
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-17T09:14:21Z
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    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-18T01:18:30+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x8b057c425782194de344c6ee4eb37b0faf48ee13a355055e274dbff6273e8bef
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958480
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958480
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL6VE2579395
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-18T02:58:58Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b057c425782194de344c6ee4eb37b0faf48ee13a355055e274dbff6273e8bef. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL6VE2579395 — a six-check JSON result.
    date published: 2026-07-18T02:58:58Z
  audio: De Autobus
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 99.971
    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: 0.776
    additional property: Energy
      type: PropertyValue
      value: 0.598
    additional property: Speechiness
      type: PropertyValue
      value: 0.029
    additional property: Acousticness
      type: PropertyValue
      value: 0.124
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.173
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.966
    additional property: Loudness (dB)
      type: PropertyValue
      value: -9.055
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Kleuren Van De Regenboog
  type: MusicRecording
  duration: PT1M41S
  duration ms: 101500
  explicit: false
  by artist: Kinderliedjes Loulou en Lou
  in album: Muziek voor Jonge Kinderen op School en Thuis
    type: MusicAlbum
    date published: 2025-09-12
  genre: children's music
  isrc code: NL6VE2579397
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-16T15:18:18+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x69b9977a5f91893c16731648455fe10ec20967ed2c8ed358121a3670f8173c0a
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958300
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958300
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Kleuren Van De Regenboog
track: Dit Zijn Mijn Wangetjes
track: Rikke Tikke Tik Het Regent
track: Zon En Maan En Sterren
track: Het Is Winter Bibber Bibber

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL6VE2579397

OTSTimestamp
type: PropertyValue
value: 2026-07-16T16:14:30Z

OTSVerifyInstructions
type: PropertyValue
value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b9977a5f91893c16731648455fe10ec20967ed2c8ed358121a3670f8173c0a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL6VE2579397 — a six-check JSON result.
date published: 2026-07-16T16:14:30Z

Kleuren Van De Regenboog
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 90.072
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: 0.594
additional property: Energy
  type: PropertyValue
  value: 0.245
additional property: Speechiness
  type: PropertyValue
  value: 0.026
additional property: Acousticness
  type: PropertyValue
  value: 0.792
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.126
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.272
additional property: Loudness (dB)
  type: PropertyValue
  value: -11.126
additional property: Key Name
  type: PropertyValue
  value: A
additional property: Mode Name
  type: PropertyValue
  value: Major

Dit Zijn Mijn Wangetjes
type: MusicRecording
duration: PT1M28S
duration ms: 88950
explicit: false
by artist: Kinderliedjes Loulou en Lou
in album: Muziek voor Jonge Kinderen op School en Thuis
  type: MusicAlbum
  date published: 2025-09-12
genre: children's music
isrc code: NL6VE2579398
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-18T03:21:01+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd0cc7fd1c00762e268cb8d46e74f227e9149b8822a022300375c3276b90a43cf
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958484
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958484
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL6VE2579398
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-18T03:34:53Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cc7fd1c00762e268cb8d46e74f227e9149b8822a022300375c3276b90a43cf. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL6VE2579398 — a six-check JSON result.
  date published: 2026-07-18T03:34:53Z
audio: Dit Zijn Mijn Wangetjes
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 85.045
  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: 0.758
  additional property: Energy
    type: PropertyValue
    value: 0.514
  additional property: Speechiness
    type: PropertyValue
    value: 0.035
  additional property: Acousticness
    type: PropertyValue
    value: 0.438
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.34
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.659
  additional property: Loudness (dB)
    type: PropertyValue
    value: -10.108
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Major

Rikke Tikke Tik Het Regent
type: MusicRecording
duration: PT1M6S
duration ms: 66291
explicit: false
by artist: Kinderliedjes Loulou en Lou
in album: Muziek voor Jonge Kinderen op School en Thuis
  type: MusicAlbum
  date published: 2025-09-12
genre: children's music
isrc code: NL6VE2579400
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-06T05:12:43+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf0aed2202c851c5ce278216806ce8b65214026e85118ec6f972576d03fd1a56f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956889
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956889
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL6VE2579400
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-06T06:56:49Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0aed2202c851c5ce278216806ce8b65214026e85118ec6f972576d03fd1a56f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL6VE2579400 — a six-check JSON result.
  date published: 2026-07-06T06:56:49Z
audio: Rikke Tikke Tik Het Regent
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 125.354
  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: 0.657
  additional property: Energy
    type: PropertyValue
    value: 0.283
  additional property: Speechiness
    type: PropertyValue
    value: 0.04
  additional property: Acousticness
    type: PropertyValue
    value: 0.942
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.347
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.461
  additional property: Loudness (dB)
    type: PropertyValue
    value: -11.996
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major

Zon En Maan En Sterren
type: MusicRecording
duration: PT1M10S
duration ms: 70806
explicit: false
by artist: Kinderliedjes Loulou en Lou
in album: Muziek voor Jonge Kinderen op School en Thuis
  type: MusicAlbum
  date published: 2025-09-12
genre: children's music
isrc code: NL6VE2579401
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-06T06:33:55+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3c8b1e1e458015ff94c1501add8fd34f4193c411bac3e075e216f3240aed6f44
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956889
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956889
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL6VE2579401
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-06T06:56:49Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8b1e1e458015ff94c1501add8fd34f4193c411bac3e075e216f3240aed6f44. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL6VE2579401 — a six-check JSON result.
  date published: 2026-07-06T06:56:49Z
audio: Zon En Maan En Sterren
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 139.91
  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: 0.655
  additional property: Energy
    type: PropertyValue
    value: 0.406
  additional property: Speechiness
    type: PropertyValue
    value: 0.042
  additional property: Acousticness
    type: PropertyValue
    value: 0.134
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.164
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.855
  additional property: Loudness (dB)
    type: PropertyValue
    value: -9.153
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

Het Is Winter Bibber Bibber
type: MusicRecording
duration: PT2M31S
duration ms: 151582
explicit: false
by artist: Kinderliedjes Loulou en Lou
in album: Muziek voor Jonge Kinderen op School en Thuis
  type: MusicAlbum
  date published: 2025-09-12
genre: children's music
isrc code: NL6VE2579403
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-04T03:12:00+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6ceebe0e17e1bcf554ac330c8422f3106d7f09d2a85c68385b8931eee461fd59
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956634
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956634
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL6VE2579403
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-04T10:04:33Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ceebe0e17e1bcf554ac330c8422f3106d7f09d2a85c68385b8931eee461fd59. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL6VE2579403 — a six-check JSON result.
  date published: 2026-07-04T10:04:33Z
audio: Het Is Winter Bibber Bibber
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 94.954
  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: 0.783
  additional property: Energy
    type: PropertyValue
    value: 0.414
  additional property: Speechiness
    type: PropertyValue
    value: 0.04
  additional property: Acousticness
    type: PropertyValue
    value: 0.254
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.527
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.777
  additional property: Loudness (dB)
    type: PropertyValue
    value: -9.497
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Major

Sinterklaas Kapoentje & Sinterklaasje Bonne Bonne Bonne
type: MusicAlbum
date published: 2025-10-24

Sinterklaas Goedheiligman
type: MusicAlbum
date published: 2025-10-31

Sinterklaas Swingt! De leukste Sinterklaasliedjes in Brass Band Stijl
type: MusicAlbum
date published: 2025-11-07