Jaroslav Soucek
type: MusicGroup
genre: opera
popularity: 2
followers: 2
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0xd382406f9a6cb3f9fe950e1adbc520a23ceb01746a6af2c72ff308c890c17672
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSProofURL
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  value: https://artists.proofprofile.net/proofs/artist/8207f7bd-8260-4fee-bbe1-3796ed8dd8c3.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8207f7bd-8260-4fee-bbe1-3796ed8dd8c3.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/8207f7bd-8260-4fee-bbe1-3796ed8dd8c3
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additional property: OTSCanonicalRecord
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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 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 0xd382406f9a6cb3f9fe950e1adbc520a23ceb01746a6af2c72ff308c890c17672. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8207f7bd-8260-4fee-bbe1-3796ed8dd8c3.json and https://artists.proofprofile.net/proofs/artist/8207f7bd-8260-4fee-bbe1-3796ed8dd8c3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
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track: Káta Kabanová / Act 3: Videt se s nim
  type: MusicRecording
  duration: PT11M40S
  duration ms: 700733
  explicit: false
  by artist: Leoš Janáček
  by artist: Elisabeth Söderström
  by artist: Jaroslav Soucek
  by artist: Peter Dvorsky
  by artist: Wiener Staatsopernchor
  by artist: Wiener Philharmoniker
  by artist: Sir Charles Mackerras
  in album: Janácek: Kát'a Kabanová
    type: MusicAlbum
    date published: 1977-01-01
  genre: classical
  genre: czech-classical
  genre: early-modern-classical
  genre: contemporary-classical
  genre: post-romantic-era
  isrc code: GBF077641325
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
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    type: PropertyValue
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    value: 960418
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    type: PropertyValue
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077641325
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-31T15:20:15Z
  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 0x2276e39499745b91c008ed98f9dd511b51d234f1b2f5019a4bf1a01eb2d57521. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBF077641325.
    date published: 2026-07-31T15:20:15Z
  audio: Káta Kabanová / Act 3: Videt se s nim
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 135.556
    additional property: Musical Key
      type: PropertyValue
      value: 8
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 6
    additional property: Danceability
      type: PropertyValue
      value: 0.246
    additional property: Energy
      type: PropertyValue
      value: 0.08
    additional property: Speechiness
      type: PropertyValue
      value: 0.044
    additional property: Acousticness
      type: PropertyValue
      value: 0.946
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.007
    additional property: Liveness
      type: PropertyValue
      value: 0.152
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.036
    additional property: Loudness (dB)
      type: PropertyValue
      value: -21.473
    additional property: Key Name
      type: PropertyValue
      value: Ab
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Káta Kabanová / Act 3: Ptácci prileti na mohylu
  type: MusicRecording
  duration: PT3M17S
  duration ms: 197173
  explicit: false
  by artist: Leoš Janáček
  by artist: Jaroslav Soucek
  by artist: Elisabeth Söderström
  by artist: Adolf Tomaschek
  by artist: Dalibor Jedlicka
  by artist: Jitka Pavlova
  by artist: Vladimir Krejcik
  by artist: Naděžda Kniplová
  by artist: Wiener Staatsopernchor
  by artist: Wiener Philharmoniker
  by artist: Sir Charles Mackerras
  in album: Janácek: Kát'a Kabanová
    type: MusicAlbum
    date published: 1977-01-01
  genre: classical
  genre: czech-classical
  genre: early-modern-classical
  genre: contemporary-classical
  genre: post-romantic-era
  isrc code: GBF077641327
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
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  additional property: OTSHash
  additional property: OTSBitcoinBlock
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  additional property: OTSBitcoinBlockVerifyURL
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077641327
  additional property: OTSTimestamp
    type: PropertyValue
    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
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfde57302e31dcb3752109b0eb4810c477ceee9a576c70adbc84a828fc44444. 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/GBF077641327.
    date published: 2026-07-08T03:20:19Z
  audio: Káta Kabanová / Act 3: Ptácci prileti na mohylu
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 106.509
    additional property: Musical Key
      type: PropertyValue
      value: 3
    additional property: Mode (Major/Minor)
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      value: 0
    additional property: Time Signature
    additional property: Danceability
    additional property: Energy
    additional property: Speechiness
    additional property: Acousticness
    additional property: Instrumentalness
    additional property: Liveness
    additional property: Valence (Positivity)
    additional property: Loudness (dB)
    additional property: Key Name
    additional property: Mode Name

Time Signature
type: PropertyValue
value: 5

Danceability
type: PropertyValue
value: 0.335

Energy
type: PropertyValue
value: 0.378

Speechiness
type: PropertyValue
value: 0.051

Acousticness
type: PropertyValue
value: 0.87

Instrumentalness
type: PropertyValue
value: 0.059

Liveness
type: PropertyValue
value: 0.164

Valence (Positivity)
type: PropertyValue
value: 0.136

Loudness (dB)
type: PropertyValue
value: -17.091

Key Name
type: PropertyValue
value: Eb

Mode Name
type: PropertyValue
value: Minor