Jan Matásek
type: MusicGroup
track: Afrika
  type: MusicRecording
  duration: PT3M54S
  duration ms: 234306
  explicit: false
  by artist: Jan Matásek
  by artist: Anna Schmidtmajerová
  by artist: Jan Hrovatitsch
  by artist: Dalibor Mucha
  by artist: Petr Stach
  by artist: Ondřej Nosálek
  by artist: Zbyněk Šporc
  by artist: Minor
  in album: Písně Divadla Minor IV
    type: MusicAlbum
    date published: 2015-10-30
  isrc code: CZM631500011
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-08-01T02:15:46+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xedf6221bb0f571122f1f54fc4cfaa91172a80c39d46a592e09eb192adfe84b5f
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960500
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960500
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZM631500011
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-08-01T03:13:03Z
  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 0xedf6221bb0f571122f1f54fc4cfaa91172a80c39d46a592e09eb192adfe84b5f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CZM631500011.
    date published: 2026-08-01T03:13:03Z
  audio: Afrika
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 134.226
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.651
    additional property: Energy
      type: PropertyValue
      value: 0.824
    additional property: Speechiness
      type: PropertyValue
      value: 0.142
    additional property: Acousticness
      type: PropertyValue
      value: 0.069
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.085
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.337
    additional property: Loudness (dB)
      type: PropertyValue
      value: -11.638
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major