De Vrijbuiters
type: MusicGroup
genre: polka
popularity: 27
followers: 2609
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4e4e6d82ab9f4f4cd243ccc4230a27a16c05050f083c4da4a8b5ae9784f58c65
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6c4c33b9-4d84-4518-865f-d1e02521b52d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6c4c33b9-4d84-4518-865f-d1e02521b52d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/6c4c33b9-4d84-4518-865f-d1e02521b52d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4e4e6d82ab9f4f4cd243ccc4230a27a16c05050f083c4da4a8b5ae9784f58c65","name":"De Vrijbuiters","registered_at":"2026-06-12T00:13:48Z","symbol":"NIM0141162","token_address":"0xaa439534c7d058ae73a409771633c04d2345a805","type":"artist","uuid":"6c4c33b9-4d84-4518-865f-d1e02521b52d"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4e6d82ab9f4f4cd243ccc4230a27a16c05050f083c4da4a8b5ae9784f58c65. 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/6c4c33b9-4d84-4518-865f-d1e02521b52d.json and https://artists.proofprofile.net/proofs/artist/6c4c33b9-4d84-4518-865f-d1e02521b52d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0x4e4e6d82ab9f4f4cd243ccc4230a27a16c05050f083c4da4a8b5ae9784f58c65","name":"De Vrijbuiters","registered_at":"2026-06-12T00:13:48Z","symbol":"NIM0141162","token_address":"0xaa439534c7d058ae73a409771633c04d2345a805","type":"artist","uuid":"6c4c33b9-4d84-4518-865f-d1e02521b52d"}
album: De Vrijbuiters (bonus version)
  type: MusicAlbum
  date published: 1980
album: De Vrijbuiters (bonus version)
  type: MusicAlbum
  date published: 1980
  track: Halliehallo
    type: MusicRecording
    duration: PT3M49S
    duration ms: 229426
    explicit: false
    by artist: De Vrijbuiters
    in album: De Vrijbuiters (bonus version)
      type: MusicAlbum
      date published: 1980
    genre: polka
    isrc code: NLH837187001
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T09:35:23+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xa381514225953a0f06f55039abeb04f5008be1e96f640ee4b68c48c042ce0667
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958392
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958392
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLH837187001
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T09:46:31Z
    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 0xa381514225953a0f06f55039abeb04f5008be1e96f640ee4b68c48c042ce0667. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLH837187001.
      date published: 2026-07-17T09:46:31Z
    audio: Halliehallo
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 131.376
      additional property: Musical Key
        type: PropertyValue
        value: 6
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.561
      additional property: Energy
        type: PropertyValue
        value: 0.781
      additional property: Speechiness
        type: PropertyValue
        value: 0.049
      additional property: Acousticness
        type: PropertyValue
        value: 0.034
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.047
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.684
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.717
      additional property: Key Name
        type: PropertyValue
        value: F#
      additional property: Mode Name
        type: PropertyValue
        value: Minor
  track: D'n Hemeltango
    type: MusicRecording
    duration: PT3M19S
    duration ms: 199506
    explicit: false
    by artist: De Vrijbuiters
    in album: De Vrijbuiters (bonus version)
      type: MusicAlbum
      date published: 1980
    genre: polka
    isrc code: NLH837187003
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T09:19:14+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x6d0a26e6b063bb7bbc91d371287b9833390ba7120b2ff382ddd6e6d2caba8225
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958390
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958390
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLH837187003
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T09:35:49Z
    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 0x6d0a26e6b063bb7bbc91d371287b9833390ba7120b2ff382ddd6e6d2caba8225. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLH837187003.
      date published: 2026-07-17T09:35:49Z
    audio: D'n Hemeltango
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 119.252
      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: 0.507
      additional property: Energy
        type: PropertyValue
        value: 0.527
      additional property: Speechiness
        type: PropertyValue
        value: 0.033
      additional property: Acousticness
        type: PropertyValue
        value: 0.57
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.07
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
  track: Veur os Mam
  track: Poeleke ploense
  track: De hudjes
  track: In Nizjininowgorod
  track: Paeterke
  track: Ave Maria
  track: Chineesleedje
  track: Waat waas de waereld zonder maedjes
album: Instrumentaal (Accordeon)
album: Alles Heeft Hij Verloren
album: De Vrijbuiters
album: Gezelligheid Kent Geen Tijd
album: Lieveling, Heb Jij Me Niet Meer Nodig?
album: Rode Rozen, Gaf Jij Aan Mij
album: Rode rozen gaf jij aan mij en 15 andere grote hits!
album: Gewoon....De Vrijbuiters
album: Rode rozen gaf jij aan mij en 15 andere grote hits !
album: Zoals We Zijn
album: Moest Dat Nou?
album: Vraag Niet Hoe Het Kan
album: Terug In De Tijd
album: Nemen En Geven
album: Alles In Het Leven Duurt Maar Even
album: 10 Jaar De Vrijbuiters
album: De Zee Die Neemt, De Zee Die Geeft
album: Alles Wat Ze Heeft
album: Vrouw Meyer
album: Na Regen Komt Zonneschijn
album: Nooit, Nee Nooit!
album: Twee Kinderogen
album: Dans Met Mij Corina
album: Tiroler Polka
album: Ciao,Ciao,Marina
album: Als `N Carrousel
album: Even Al Je Zorgen Vergeten Met.....
album: 12 1/2 Jaar single collectie
album: Kijk Nog eenmaal In M`n Ogen
album: Isabel
album: Feest met de trekzak..Deel 1
album: Voor M`n Kleinkind Doe Ik Alles
album: Twee Armen En Een Zoen
album: Feest met de trekzak..Deel 2
album: Voor Jou Staat M`n Deur Altijd Open
album: Voor en met vrienden! Deel 1 (Piratentip!)
album: Voor en met vrienden ! Deel 1 (Piratentip !)
album: Ode aan de piraten!
album: Ode aan de piraten !
album: Zo Is Het Leven
album: Beleef het mee met ........
album: Mammie, Toe Drink Niet Meer
album: Hallo Tirool (Ich Komme Aus Holland)
album: Rozen Te Veel Om Ooit Te Tellen
album: 5 Jaar De Vrijbuiters
album: Voor en met vrienden ! Deel 2 (Piratentip !)
album: Uit het leven gegrepen
album: Hij Was Een Jongen Van De Straat
album: Voor en met vrienden! Deel 2 (Piratentip!)
album: Dans ,Zing ,Lach En Geniet
album: Voor en met vrienden! Deel 3 (Piratentip)
album: Apres skién met .....De Vrijbuiters
album: Voor en met vrienden ! Deel 3 (Piratentip)
album: Zingen hun mooiste smartlappen !
album: Zingen hun mooiste smartlappen!
album: Mooi Griekenland
album: M`n Moeder , Wat Mis Ik Haar
album: Voor en met vrienden ! Deel 4 (Piratentip)
album: 20 Jaar....De Vrijbuiters
album: Voor en met vrienden! Deel 4 (Piratentip)
album: Feest met de trekzak..Deel 3
album: Afscheid

Valence (Positivity)
type: PropertyValue
value: 0.603

Loudness (dB)
type: PropertyValue
value: -6.031

Key Name
type: PropertyValue
value: D

Mode Name
type: PropertyValue
value: Major

Veur os Mam
type: MusicRecording
duration: PT3M45S
duration ms: 225720
explicit: false
by artist: De Vrijbuiters
in album: De Vrijbuiters (bonus version)
  type: MusicAlbum
  date published: 1980
genre: polka
isrc code: NLH837187004
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-05T03:50:22+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd80255a521c0f80c98297dc8be6211ca2a519ef2e352bd87609249a3e317d948
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956772
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956772
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLH837187004
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-05T10:01:46Z
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 0xd80255a521c0f80c98297dc8be6211ca2a519ef2e352bd87609249a3e317d948. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLH837187004.
  date published: 2026-07-05T10:01:46Z
audio: Veur os Mam
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 90.648
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.532
  additional property: Energy
    type: PropertyValue
    value: 0.614
  additional property: Speechiness
    type: PropertyValue
    value: 0.026
  additional property: Acousticness
    type: PropertyValue
    value: 0.56
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.176
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.351
  additional property: Loudness (dB)
    type: PropertyValue
    value: -7.265
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major

Poeleke ploense
type: MusicRecording
duration: PT4M50S
duration ms: 290146
explicit: false
by artist: De Vrijbuiters
in album: De Vrijbuiters (bonus version)
  type: MusicAlbum
  date published: 1980
genre: polka
isrc code: NLH837187006
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-20T19:01:49+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x338f210cc2582169dff7810f4307028753c5c7963356a9edb834717acc714a34
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958931
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958931
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLH837187006
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-20T21:15:01Z
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 0x338f210cc2582169dff7810f4307028753c5c7963356a9edb834717acc714a34. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLH837187006.
  date published: 2026-07-20T21:15:01Z
audio: Poeleke ploense
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 107.3
  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: 0.784
  additional property: Energy
    type: PropertyValue
    value: 0.945
  additional property: Speechiness
    type: PropertyValue
    value: 0.092
  additional property: Acousticness
    type: PropertyValue
    value: 0.077
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.493
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.831
  additional property: Loudness (dB)
    type: PropertyValue
    value: -6.33
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Major

De hudjes
type: MusicRecording
duration: PT3M0S
duration ms: 180946
explicit: false
by artist: De Vrijbuiters
in album: De Vrijbuiters (bonus version)
  type: MusicAlbum
  date published: 1980
genre: polka
isrc code: NLH837187008
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-04T08:43:12+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb8cff2783558c218c4602335b14965b0421313e5cc60317ee54c8341649a131c
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/NLH837187008
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 0xb8cff2783558c218c4602335b14965b0421313e5cc60317ee54c8341649a131c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLH837187008.
  date published: 2026-07-04T10:04:33Z
audio: De hudjes
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 206.672
  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: 0.411
  additional property: Energy
    type: PropertyValue
    value: 0.758
  additional property: Speechiness
    type: PropertyValue
    value: 0.034
  additional property: Acousticness
    type: PropertyValue
    value: 0.427
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.213
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.97
  additional property: Loudness (dB)
    type: PropertyValue
    value: -6.628
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major

In Nizjininowgorod
type: MusicRecording
duration: PT2M50S
duration ms: 170000
explicit: false
by artist: De Vrijbuiters
in album: De Vrijbuiters (bonus version)
  type: MusicAlbum
  date published: 1980
genre: polka
isrc code: NLH837187009
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-21T17:48:02+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf17f0340ecbc5f137bb4a529ac7370896c890efbcc73ca1043cc9a2670c6a5f8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 959043
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/959043
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLH837187009
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-21T18:40:26Z
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 0xf17f0340ecbc5f137bb4a529ac7370896c890efbcc73ca1043cc9a2670c6a5f8. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLH837187009.
  date published: 2026-07-21T18:40:26Z
audio: In Nizjininowgorod
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 130.845
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.526
  additional property: Energy
    type: PropertyValue
    value: 0.92
  additional property: Speechiness
    type: PropertyValue
    value: 0.07
  additional property: Acousticness
    type: PropertyValue
    value: 0.342
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.275
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.814
  additional property: Loudness (dB)
    type: PropertyValue
    value: -4.301
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Paeterke
type: MusicRecording
duration: PT2M52S
duration ms: 172773
explicit: false
by artist: De Vrijbuiters
in album: De Vrijbuiters (bonus version)
  type: MusicAlbum
  date published: 1980
genre: polka
isrc code: NLH837187011
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-05T22:32:23+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb1c8c94b6b7452ee6eec865c2af1267bfcc42ae18dd465ca7e86e4b3ed1f57d2
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/NLH837187011
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 0xb1c8c94b6b7452ee6eec865c2af1267bfcc42ae18dd465ca7e86e4b3ed1f57d2. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLH837187011.
  date published: 2026-07-06T01:25:57Z
audio: Paeterke
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 122.387
  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: 0.502
  additional property: Energy
    type: PropertyValue
    value: 0.547
  additional property: Speechiness
    type: PropertyValue
    value: 0.031
  additional property: Acousticness
    type: PropertyValue
    value: 0.055
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.121
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.501
  additional property: Loudness (dB)
    type: PropertyValue
    value: -7.654
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

Ave Maria
type: MusicRecording
duration: PT4M36S
duration ms: 276160
explicit: false
by artist: De Vrijbuiters
in album: De Vrijbuiters (bonus version)
  type: MusicAlbum
  date published: 1980
genre: polka
isrc code: NLH837187012
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-06T00:52:02+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2032558021305b1800ce0d9f37618623d2e6e4781262d6940107a0a220e526fe
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/NLH837187012
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 0x2032558021305b1800ce0d9f37618623d2e6e4781262d6940107a0a220e526fe. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLH837187012.
  date published: 2026-07-06T01:25:57Z
audio: Ave Maria
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 168.675
  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: 0.157
  additional property: Energy
    type: PropertyValue
    value: 0.656
  additional property: Speechiness
    type: PropertyValue
    value: 0.032
  additional property: Acousticness
    type: PropertyValue
    value: 0.381
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.35
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.245
  additional property: Loudness (dB)
    type: PropertyValue
    value: -5.473
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

Chineesleedje
type: MusicRecording
duration: PT3M19S
duration ms: 199560
explicit: false
by artist: De Vrijbuiters
in album: De Vrijbuiters (bonus version)
  type: MusicAlbum
  date published: 1980
genre: polka
isrc code: NLH837187013
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-18T10:45:02+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x748b4c35bcc5674f53935a7978376420b1b206cb86fb8538ff608d23731c8def
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958541
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958541
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLH837187013
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-18T11:37:54Z
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 0x748b4c35bcc5674f53935a7978376420b1b206cb86fb8538ff608d23731c8def. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLH837187013.
  date published: 2026-07-18T11:37:54Z
audio: Chineesleedje
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 76.474
  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: 0.355
  additional property: Energy
    type: PropertyValue
    value: 0.862
  additional property: Speechiness
    type: PropertyValue
    value: 0.048
  additional property: Acousticness
    type: PropertyValue
    value: 0.242
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.262
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.811
  additional property: Loudness (dB)
    type: PropertyValue
    value: -4.829
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major

Waat waas de waereld zonder maedjes
type: MusicRecording
duration: PT3M29S
duration ms: 209213
explicit: false
by artist: De Vrijbuiters
in album: De Vrijbuiters (bonus version)
  type: MusicAlbum
  date published: 1980
genre: polka
isrc code: NLH837416016
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-04T15:15:29+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xbdedbb57a7a29de98368debe7a5c28b0699910feca0cc7b94eec56fd0b26d598
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/NLH837416016
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 0xbdedbb57a7a29de98368debe7a5c28b0699910feca0cc7b94eec56fd0b26d598. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLH837416016.
  date published: 2026-07-05T01:12:41Z
audio: Waat waas de waereld zonder maedjes
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 112.692
  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: 0.795
  additional property: Energy
    type: PropertyValue
    value: 0.719
  additional property: Speechiness
    type: PropertyValue
    value: 0.029
  additional property: Acousticness
    type: PropertyValue
    value: 0.141
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.181
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.966
  additional property: Loudness (dB)
    type: PropertyValue
    value: -6.919
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Major

Instrumentaal (Accordeon)
type: MusicAlbum
date published: 1985

Alles Heeft Hij Verloren
type: MusicAlbum
date published: 1985

Instrumentaal (Accordeon)
type: MusicAlbum
date published: 1985
track: Aan Het Strand Van Porto Rico
  type: MusicRecording
  duration: PT3M53S
  duration ms: 233000
  explicit: false
  by artist: De Vrijbuiters
  in album: Instrumentaal (Accordeon)
    type: MusicAlbum
    date published: 1985
  genre: polka
  isrc code: NLW2R1824910
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-03T18:01:28+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x52ca2baffe4fe324f90bc31a6573780e98359f7de35075d513227085777aeed6
  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/NLW2R1824910
  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 0x52ca2baffe4fe324f90bc31a6573780e98359f7de35075d513227085777aeed6. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLW2R1824910.
    date published: 2026-07-03T21:18:05Z
  audio: Aan Het Strand Van Porto Rico
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 119.769
    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: 0.558
    additional property: Energy
      type: PropertyValue
      value: 0.602
    additional property: Speechiness
      type: PropertyValue
      value: 0.041
    additional property: Acousticness
      type: PropertyValue
      value: 0.621
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.979
    additional property: Liveness
      type: PropertyValue
      value: 0.167
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.789
    additional property: Loudness (dB)
      type: PropertyValue
      value: -8
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major

De Vrijbuiters
type: MusicAlbum
date published: 1988

De Vrijbuiters
type: MusicAlbum
date published: 1988

Gezelligheid Kent Geen Tijd
type: MusicAlbum
date published: 1989

Gezelligheid Kent Geen Tijd
type: MusicAlbum
date published: 1989
track: Jou Herken Ik Met Gesloten Ogen
  type: MusicRecording
  duration: PT3M16S
  duration ms: 196000
  explicit: false
  by artist: De Vrijbuiters
  in album: Gezelligheid Kent Geen Tijd
    type: MusicAlbum
    date published: 1989
  genre: polka
  isrc code: NLW2R1824885
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-04T20:50:59+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x456e7c74aec4267226eb6b8f5d0fe4f98b6e53053f001957d0fc10fa6374c140
  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/NLW2R1824885
  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 0x456e7c74aec4267226eb6b8f5d0fe4f98b6e53053f001957d0fc10fa6374c140. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLW2R1824885.
    date published: 2026-07-05T01:12:41Z
  audio: Jou Herken Ik Met Gesloten Ogen
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 118.05
    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: 0.512
    additional property: Energy
      type: PropertyValue
      value: 0.581
    additional property: Speechiness
      type: PropertyValue
      value: 0.041
    additional property: Acousticness
      type: PropertyValue
      value: 0.389
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.26
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.618
    additional property: Loudness (dB)
      type: PropertyValue
      value: -14.623
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major

Lieveling, Heb Jij Me Niet Meer Nodig?
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Rode Rozen, Gaf Jij Aan Mij
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Rode rozen gaf jij aan mij en 15 andere grote hits!
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Gewoon....De Vrijbuiters
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Gewoon....De Vrijbuiters
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Rode rozen gaf jij aan mij en 15 andere grote hits !
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Zoals We Zijn
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Moest Dat Nou?
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Vraag Niet Hoe Het Kan
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Zoals We Zijn
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Terug In De Tijd
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Terug In De Tijd
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Nemen En Geven
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Alles In Het Leven Duurt Maar Even
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Alles In Het Leven Duurt Maar Even
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10 Jaar De Vrijbuiters
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De Zee Die Neemt, De Zee Die Geeft
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Alles Wat Ze Heeft
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Vrouw Meyer
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10 Jaar De Vrijbuiters
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Na Regen Komt Zonneschijn
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Nooit, Nee Nooit!
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Na Regen Komt Zonneschijn
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Twee Kinderogen
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Dans Met Mij Corina
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Tiroler Polka
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Dans Met Mij Corina
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Ciao,Ciao,Marina
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Als `N Carrousel
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Even Al Je Zorgen Vergeten Met.....
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12 1/2 Jaar single collectie
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12 1/2 Jaar single collectie
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Kijk Nog eenmaal In M`n Ogen
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Isabel
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Feest met de trekzak..Deel 1
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Voor M`n Kleinkind Doe Ik Alles
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Feest met de trekzak..Deel 1
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Twee Armen En Een Zoen
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Feest met de trekzak..Deel 2
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Feest met de trekzak..Deel 2
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Voor Jou Staat M`n Deur Altijd Open
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Voor en met vrienden! Deel 1 (Piratentip!)
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Voor en met vrienden ! Deel 1 (Piratentip !)
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Ode aan de piraten!
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Ode aan de piraten !
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Zo Is Het Leven
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Beleef het mee met ........
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Mammie, Toe Drink Niet Meer
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Hallo Tirool (Ich Komme Aus Holland)
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Rozen Te Veel Om Ooit Te Tellen
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5 Jaar De Vrijbuiters
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Beleef het mee met ........
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5 Jaar De Vrijbuiters
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Mammie, Toe Drink Niet Meer
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Voor en met vrienden ! Deel 2 (Piratentip !)
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Uit het leven gegrepen
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Hij Was Een Jongen Van De Straat
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Voor en met vrienden! Deel 2 (Piratentip!)
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Dans ,Zing ,Lach En Geniet
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Voor en met vrienden! Deel 3 (Piratentip)
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Apres skién met .....De Vrijbuiters
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Apres skién met .....De Vrijbuiters
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Voor en met vrienden ! Deel 3 (Piratentip)
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Zingen hun mooiste smartlappen !
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Zingen hun mooiste smartlappen!
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Mooi Griekenland
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M`n Moeder , Wat Mis Ik Haar
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Voor en met vrienden ! Deel 4 (Piratentip)
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20 Jaar....De Vrijbuiters
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Voor en met vrienden! Deel 4 (Piratentip)
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Feest met de trekzak..Deel 3
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Feest met de trekzak..Deel 3
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Afscheid
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Afscheid
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Liefde En Geborgenheid
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Liedjes die je nooit vergeet
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Liedjes die je nooit vergeet
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Dans Nog Één Keertje Met Mij
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Dans Nog Één Keertje Met Mij
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Dat mooie kleine huisje
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Dat mooie kleine huisje
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De vrijbuiters 25 jaar Album 1 en 2
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De vrijbuiters 25 jaar Album 1 en 2
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Vrolijk Kerstfeest met de Vrijbuiters
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Vrolijk Kerstfeest met de Vrijbuiters
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Met 'n lach en 'n traan
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Een rondje accordeon met......
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De mooiste herinneringen
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Met `n lach en `n traan
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Een rondje accordeon met......
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Haal de zon in huis met.....
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De mooiste herinneringen
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Haal de zon in huis met.....
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15 Jaar.....De Vrijbuiters
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Even terug naar vroeger
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Gouwe Ouwe van......
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Gouwe Ouwe van......
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De Allerbeste Gouwe
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De Allerbeste Van.......
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De Allerbeste Gouwe
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De Allerbeste Van.......
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Kom ga je mee?
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subject of: OpenTimestamps Proof of Existence
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