De Roffels
type: MusicGroup
genre: polka
popularity: 16
followers: 1935
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb42145549ca42c1f81baa64912e6bea1178482a1edea996db5f149fde32204e0
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953778
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953778
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ce14e2c1-a3e8-4831-a8ee-c7b020151fd7.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ce14e2c1-a3e8-4831-a8ee-c7b020151fd7.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ce14e2c1-a3e8-4831-a8ee-c7b020151fd7
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T11:57:35Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xb42145549ca42c1f81baa64912e6bea1178482a1edea996db5f149fde32204e0","name":"De Roffels","registered_at":"2026-06-15T02:11:34Z","symbol":"NIM0649436","token_address":"0x8bfb9324d28d2340f0dd6b18a14b619ab028d619","type":"artist","uuid":"ce14e2c1-a3e8-4831-a8ee-c7b020151fd7"}
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42145549ca42c1f81baa64912e6bea1178482a1edea996db5f149fde32204e0. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce14e2c1-a3e8-4831-a8ee-c7b020151fd7.json and https://artists.proofprofile.net/proofs/artist/ce14e2c1-a3e8-4831-a8ee-c7b020151fd7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T11:57:35Z
  text: {"copyright_id":"0xb42145549ca42c1f81baa64912e6bea1178482a1edea996db5f149fde32204e0","name":"De Roffels","registered_at":"2026-06-15T02:11:34Z","symbol":"NIM0649436","token_address":"0x8bfb9324d28d2340f0dd6b18a14b619ab028d619","type":"artist","uuid":"ce14e2c1-a3e8-4831-a8ee-c7b020151fd7"}
album: De prins op het witte paard
  type: MusicAlbum
  date published: 1995-03-01
album: Plankenkoorts
  type: MusicAlbum
  date published: 1997-07-15
album: De Regenboog Serie: De Roffels
  type: MusicAlbum
  date published: 2009-03-20
  track: Nederland Bloemenland
    type: MusicRecording
    duration: PT3M17S
    duration ms: 197106
    explicit: false
    by artist: De Roffels
    in album: De Regenboog Serie: De Roffels
      type: MusicAlbum
      date published: 2009-03-20
    genre: polka
    isrc code: NLAX70928319
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T00:35:54+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xbf696c1aab6c16ebb5ba79335441c5605f88b7c54ca261d30ff34d0f334e0f06
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956422
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956422
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLAX70928319
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-03T01:01:38Z
    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → 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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf696c1aab6c16ebb5ba79335441c5605f88b7c54ca261d30ff34d0f334e0f06. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLAX70928319.
      date published: 2026-07-03T01:01:38Z
    audio: Nederland Bloemenland
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 125.475
      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: 0.736
      additional property: Energy
        type: PropertyValue
        value: 0.641
      additional property: Speechiness
        type: PropertyValue
        value: 0.036
      additional property: Acousticness
        type: PropertyValue
        value: 0.698
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.33
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.969
      additional property: Loudness (dB)
        type: PropertyValue
        value: -7.085
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Mien Ukelele
  type: MusicAlbum
  date published: 2013-10-23
album: Mien Ukelele
  type: MusicAlbum
  date published: 2013-10-23
album: Sneeuwman uit het noorden
  type: MusicAlbum
  date published: 2013-12-01
album: Sneeuwman uit het noorden
  type: MusicAlbum
  date published: 2013-12-02
album: Een knuffel van jou
  type: MusicAlbum
  date published: 2014-10-01
album: Een knuffel van jou
  type: MusicAlbum
  date published: 2014-10-01
album: Hier zijn we weer!
  type: MusicAlbum
  date published: 2014-10-13
album: Hier zijn we weer !
  type: MusicAlbum
  date published: 2015-01-27