Het Duo
type: MusicGroup
popularity: 5
followers: 141
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x81b52e65d201e31b349506e31e8aea44a9f7b29f6c405b6f083a4166028a870d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953899
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953899
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/13e2a3c3-f871-43fb-b71d-c55e74d883a2.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/13e2a3c3-f871-43fb-b71d-c55e74d883a2.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/13e2a3c3-f871-43fb-b71d-c55e74d883a2
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T06:37:25Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x81b52e65d201e31b349506e31e8aea44a9f7b29f6c405b6f083a4166028a870d","name":"Het Duo","registered_at":"2026-06-15T20:21:06Z","symbol":"NIM0821140","token_address":"0x5e2ae6735b2b4520559d3f17523874a6a59c0f8a","type":"artist","uuid":"13e2a3c3-f871-43fb-b71d-c55e74d883a2"}
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 0x81b52e65d201e31b349506e31e8aea44a9f7b29f6c405b6f083a4166028a870d. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13e2a3c3-f871-43fb-b71d-c55e74d883a2.json and https://artists.proofprofile.net/proofs/artist/13e2a3c3-f871-43fb-b71d-c55e74d883a2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T06:37:25Z
  text: {"copyright_id":"0x81b52e65d201e31b349506e31e8aea44a9f7b29f6c405b6f083a4166028a870d","name":"Het Duo","registered_at":"2026-06-15T20:21:06Z","symbol":"NIM0821140","token_address":"0x5e2ae6735b2b4520559d3f17523874a6a59c0f8a","type":"artist","uuid":"13e2a3c3-f871-43fb-b71d-c55e74d883a2"}
album: De Muts
  type: MusicAlbum
  date published: 2015-01-11
album: De Muts
  type: MusicAlbum
  date published: 2015-01-11
  track: De Muts
    type: MusicRecording
    duration: PT3M13S
    duration ms: 193000
    explicit: false
    by artist: Het Duo
    in album: De Muts
      type: MusicAlbum
      date published: 2015-01-11
    isrc code: NLW2R1713029
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-14T23:50:38+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xe4b512480cba069f00fa6cc592993d28b6d7ce3ec069902efa6db741a70ede88
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958083
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958083
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLW2R1713029
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-15T01:50:31Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b512480cba069f00fa6cc592993d28b6d7ce3ec069902efa6db741a70ede88. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/NLW2R1713029.
      date published: 2026-07-15T01:50:31Z
    audio: De Muts
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 126.008
      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: 0.784
      additional property: Energy
        type: PropertyValue
        value: 0.869
      additional property: Speechiness
        type: PropertyValue
        value: 0.061
      additional property: Acousticness
        type: PropertyValue
        value: 0.11
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.072
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.945
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.64
      additional property: Key Name
        type: PropertyValue
        value: Eb
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Bami schijf
  type: MusicAlbum
  date published: 2015-12-27
album: Bami schijf
  type: MusicAlbum
  date published: 2015-12-27
album: Onze Toekomst
  type: MusicAlbum
  date published: 2017-02-10
album: Het Kerst Co-ro-na Lied (Radio versie)
  type: MusicAlbum
  date published: 2020-11-28