Viljoen Retief
type: MusicGroup
popularity: 5
followers: 236
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2236f0c621cc830125774ae27684d73afc720b42cdef2e1284312be93b8a234e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954130
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954130
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7cd94c51-e308-4f86-877b-89700928ceb8.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7cd94c51-e308-4f86-877b-89700928ceb8.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7cd94c51-e308-4f86-877b-89700928ceb8
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T19:07:14Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x2236f0c621cc830125774ae27684d73afc720b42cdef2e1284312be93b8a234e","name":"Viljoen Retief","registered_at":"2026-06-17T09:11:47Z","symbol":"NIM1348672","token_address":"0x5ca3af63a8d8e9b4f41bcba63236ddd19d401cb0","type":"artist","uuid":"7cd94c51-e308-4f86-877b-89700928ceb8"}
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 0x2236f0c621cc830125774ae27684d73afc720b42cdef2e1284312be93b8a234e. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7cd94c51-e308-4f86-877b-89700928ceb8.json and https://artists.proofprofile.net/proofs/artist/7cd94c51-e308-4f86-877b-89700928ceb8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T19:19:19Z
  text: {"copyright_id":"0x2236f0c621cc830125774ae27684d73afc720b42cdef2e1284312be93b8a234e","name":"Viljoen Retief","registered_at":"2026-06-17T09:11:47Z","symbol":"NIM1348672","token_address":"0x5ca3af63a8d8e9b4f41bcba63236ddd19d401cb0","type":"artist","uuid":"7cd94c51-e308-4f86-877b-89700928ceb8"}
album: Droomvanger
  type: MusicAlbum
  date published: 2017-09-20
album: Soos Die Wind
  type: MusicAlbum
  date published: 2017-09-20
album: Meerkat
  type: MusicAlbum
  date published: 2018-08-08
  track: Meerkat
    type: MusicRecording
    duration: PT3M25S
    duration ms: 205307
    explicit: false
    by artist: Viljoen Retief
    in album: Meerkat
      type: MusicAlbum
      date published: 2018-08-08
    isrc code: ZAR031800005
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T04:41:20+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xab8f244888b16385d3807890e0b6af0015ab3b52cb7a218e6454baa8efaff02c
    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/ZAR031800005
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8f244888b16385d3807890e0b6af0015ab3b52cb7a218e6454baa8efaff02c. 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/ZAR031800005.
      date published: 2026-07-05T10:01:46Z
    audio: Meerkat
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 135.016
      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: 0.73
      additional property: Energy
        type: PropertyValue
        value: 0.835
      additional property: Speechiness
        type: PropertyValue
        value: 0.059
      additional property: Acousticness
        type: PropertyValue
        value: 0.184
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.102
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.942
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.881
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Blare In Die Wind
  type: MusicAlbum
  date published: 2022-10-01