Jaroslav Navrátil
type: MusicGroup
description: Jaroslav Navrátil may refer to: Jaroslav Navrátil (tennis) (born 1957), former tennis player from Czechoslovakia Jaroslav Navrátil (footballer) (born 1991), Czech footballer Jaroslav Navrátil (spo
track: Dobrý den
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  by artist: Jaroslav Navrátil
  by artist: Armádní umělecký soubor Víta Nejedlého
  in album: The Best Of Ksč (Vybrané České Masové Písně Ve Vzorové Interpretaci)
    type: MusicAlbum
    date published: 2013-02-24
  popularity: 3
  isrc code: CZA166100147
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  additional property: OTSVerifyInstructions
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    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
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    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9e1ea9824f58a39b7d4e7a79144ed283388ac02c632dd39014d858df255f2b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CZA166100147.
    date published: 2026-07-31T02:19:15Z
  audio: Dobrý den
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      value: 1
    additional property: Time Signature
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      value: 5
    additional property: Danceability
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      value: 0.544
    additional property: Energy
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    additional property: Speechiness
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      value: 0.131
    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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      value: 0.646
    additional property: Loudness (dB)
      type: PropertyValue
      value: -10.923
    additional property: Key Name
      type: PropertyValue
      value: G
    additional property: Mode Name
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      value: Major
track: Zítřek Je Náš - Píseň Druhé Pětiletky
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  duration: PT3M30S
  duration ms: 210533
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  by artist: Jaroslav Navrátil
  by artist: Roman Horák
  in album: The Best Of Ksč (Vybrané České Masové Písně Ve Vzorové Interpretaci)
    type: MusicAlbum
    date published: 2013-02-24
  popularity: 2
  isrc code: CZA165600070
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  additional property: OTSTimestamp
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    value: 2026-07-08T03:20:19Z
  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
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    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4746245d9f8caac764f8b5b5a6174aaedaae6c20ef8d280e1971e53f058a0f5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CZA165600070.
    date published: 2026-07-08T03:20:19Z
  audio: Zítřek Je Náš - Píseň Druhé Pětiletky
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    additional property: Tempo (BPM)
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      value: 5
    additional property: Danceability
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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
      type: PropertyValue
      value: 0.363
    additional property: Valence (Positivity)
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      value: 0.59
    additional property: Loudness (dB)
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      value: -8.765
    additional property: Key Name
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      value: Eb
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track: Zemědělská
  type: MusicRecording
  duration: PT3M27S
  duration ms: 207573
  explicit: false
  by artist: Jaroslav Navrátil
  by artist: Roman Horák
  by artist: Libuše Volková
  by artist: Jana Polivkova
  in album: The Best Of Ksč (Vybrané České Masové Písně Ve Vzorové Interpretaci)
    type: MusicAlbum
    date published: 2013-02-24
  popularity: 1
  isrc code: CZA165800086
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  subject of: OpenTimestamps Proof of Existence
  audio: Zemědělská

OTSBitcoinBlock
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value: 957118

OTSBitcoinBlockVerifyURL
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value: https://blockstream.info/api/block-height/957118

OTSVerificationAPI
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value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA165800086

OTSTimestamp
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value: 2026-07-08T03:20:19Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262b7d6b72d2c62a85180b08e285b4a299853bee1b9692853a7139d951c11420. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CZA165800086.
date published: 2026-07-08T03:20:19Z

Zemědělská
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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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