Michal Stofej
type: MusicGroup
album: Hyper Classical
  type: MusicAlbum
  date published: 2024-03-01
  track: Saint Francis
    type: MusicRecording
    duration: PT3M34S
    duration ms: 214559
    explicit: false
    by artist: Michal Stofej
    in album: Hyper Classical
      type: MusicAlbum
      date published: 2024-03-01
    isrc code: SKC442400807
    additional property: CopyrightID
    additional property: CopyrightStatus
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      value: registered
    additional property: CopyrightRegisteredAt
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      value: 2026-07-31T15:50:05+00:00
    additional property: CopyrightChainExplorerURL
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      value: https://explorer.copyrightchains.com/tx/0x5c79be996078d5a6068496e70e0145cd9a56d6647a453197e2da4191caaf82a0
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    additional property: OTSBitcoinBlock
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      value: 960427
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/960427
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SKC442400807
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-31T15:59:18Z
    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 0x5c79be996078d5a6068496e70e0145cd9a56d6647a453197e2da4191caaf82a0. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/SKC442400807.
      date published: 2026-07-31T15:59:18Z
    audio: Saint Francis
      type: AudioObject
      additional property: Tempo (BPM)
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      additional property: Musical Key
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      additional property: Mode (Major/Minor)
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      additional property: Time Signature
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      additional property: Danceability
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      additional property: Energy
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      additional property: Speechiness
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      additional property: Acousticness
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      additional property: Instrumentalness
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      additional property: Liveness
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      additional property: Valence (Positivity)
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      additional property: Loudness (dB)
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        value: -8.935
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
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        value: Major