The Fouryo's
type: MusicGroup
genre: nederpop
popularity: 20
followers: 1627
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6ac276e3b61ea07ac83c4b475d9bbb5243790d0d993d191768bb714840bf3e1d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953713
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953713
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/81f8feac-e071-4893-9e58-9842cab69cfc.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/81f8feac-e071-4893-9e58-9842cab69cfc.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/81f8feac-e071-4893-9e58-9842cab69cfc
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T00:33:41Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6ac276e3b61ea07ac83c4b475d9bbb5243790d0d993d191768bb714840bf3e1d","name":"The Fouryo's","registered_at":"2026-06-14T18:06:45Z","symbol":"NIM0533715","token_address":"0xf89e7b7d8542f971b1853cc02a86aebc746b9800","type":"artist","uuid":"81f8feac-e071-4893-9e58-9842cab69cfc"}
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 0x6ac276e3b61ea07ac83c4b475d9bbb5243790d0d993d191768bb714840bf3e1d. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81f8feac-e071-4893-9e58-9842cab69cfc.json and https://artists.proofprofile.net/proofs/artist/81f8feac-e071-4893-9e58-9842cab69cfc.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-15T00:33:41Z
  text: {"copyright_id":"0x6ac276e3b61ea07ac83c4b475d9bbb5243790d0d993d191768bb714840bf3e1d","name":"The Fouryo's","registered_at":"2026-06-14T18:06:45Z","symbol":"NIM0533715","token_address":"0xf89e7b7d8542f971b1853cc02a86aebc746b9800","type":"artist","uuid":"81f8feac-e071-4893-9e58-9842cab69cfc"}
album: Kom Toch Terug
  type: MusicAlbum
  date published: 1961-01-01
album: The Story of, Vol. 2
  type: MusicAlbum
  date published: 1993-06-14
album: The Story of Volume 2
  type: MusicAlbum
  date published: 1993-06-14
album: The Story of Volume 1
  type: MusicAlbum
  date published: 1993-06-18
album: The Story of, Vol. 1
  type: MusicAlbum
  date published: 1993-06-18
album: Choo-Choo-Boogie
  type: MusicAlbum
  date published: 2015-12-11
album: The Story Of The Fouryo's
  type: MusicAlbum
  date published: 2025-01-24
track: Dans Nog Eenmaal Met Mij
  type: MusicRecording
  duration: PT2M37S
  duration ms: 157040
  explicit: false
  by artist: The Fouryo's
  in album: De Mooiste Liedjes, Vol.1
    type: MusicAlbum
    date published: 2015-01-26
  isrc code: NLG620560861
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-30T21:32:07+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x3c917bc4f20f30ef595748136600563224014cda2518707033a18d4ab4ac188e
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960321
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960321
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620560861
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-30T22:27:30Z
  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 0x3c917bc4f20f30ef595748136600563224014cda2518707033a18d4ab4ac188e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/NLG620560861 — a six-check JSON result.
    date published: 2026-07-30T22:27:30Z
  audio: Dans Nog Eenmaal Met Mij
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 143.382
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.603
    additional property: Energy
      type: PropertyValue
      value: 0.434
    additional property: Speechiness
      type: PropertyValue
      value: 0.03
    additional property: Acousticness
      type: PropertyValue
      value: 0.807
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.172
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.803
    additional property: Loudness (dB)
      type: PropertyValue
      value: -16.527
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Zeg niet nee
  type: MusicRecording
  duration: PT1M58S
  duration ms: 118706
  explicit: false
  by artist: The Fouryo's
  in album: 20 Hits Ven de Jaren Vijftig - Dutch Hits from the 50's
    type: MusicAlbum
    date published: 2011-03-18
  isrc code: NLG620457512
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-30T06:57:43+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x58304b11b76f8ff03b219292ea842217c5f1787820f45bb66ec7dae8e7488a9e
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960220
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960220
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620457512
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-30T07:28:30Z
  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 0x58304b11b76f8ff03b219292ea842217c5f1787820f45bb66ec7dae8e7488a9e. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/NLG620457512 — a six-check JSON result.
    date published: 2026-07-30T07:28:30Z
  audio: Zeg niet nee
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 187.087
    additional property: Musical Key
      type: PropertyValue
      value: 9
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.503
    additional property: Energy
    additional property: Speechiness
    additional property: Acousticness
    additional property: Instrumentalness
    additional property: Liveness
    additional property: Valence (Positivity)
    additional property: Loudness (dB)
    additional property: Key Name
    additional property: Mode Name

Energy
type: PropertyValue
value: 0.451

Speechiness
type: PropertyValue
value: 0.043

Acousticness
type: PropertyValue
value: 0.762

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.408

Valence (Positivity)
type: PropertyValue
value: 0.948

Loudness (dB)
type: PropertyValue
value: -13.355

Key Name
type: PropertyValue
value: A

Mode Name
type: PropertyValue
value: Major