Hungarian Operetta Orchestra
type: MusicGroup
genre: opera
popularity: 14
followers: 75
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additional property: OTSVerifyInstructions
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  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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  date published: 2026-06-15T19:59:56Z
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track: Der Zigeunerbaron: Act I: Als flotter Geist
  type: MusicRecording
  duration: PT2M56S
  duration ms: 176306
  explicit: false
  by artist: Johann Strauss II
  by artist: Ingrid Kertesi
  by artist: János Berkes
  by artist: Hungarian Operetta Orchestra
  by artist: Laszlo Kovacs
  in album: Best of Operetta, Vol. 1
    type: MusicAlbum
    date published: 1996-11-04
  isrc code: HKI199613806
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  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-30T05:43:45Z
  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
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    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63eb8ecbea0a15bfbd1096d83feb6a5d69f450408fd46cbc333ee3aec5837415. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/HKI199613806.
    date published: 2026-07-30T05:43:45Z
  audio: Der Zigeunerbaron: Act I: Als flotter Geist
    type: AudioObject
    additional property: Tempo (BPM)
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    additional property: Speechiness
      type: PropertyValue
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    additional property: Acousticness
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    additional property: Instrumentalness
      type: PropertyValue
      value: 0.005
    additional property: Liveness
      type: PropertyValue
      value: 0.174
    additional property: Valence (Positivity)
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      value: 0.377
    additional property: Loudness (dB)
      type: PropertyValue
      value: -23.972
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
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      value: Major
track: Fruhlingsstimmen (Voices of Spring), Op. 410
  type: MusicRecording
  duration: PT7M28S
  duration ms: 448093
  explicit: false
  by artist: Johann Strauss II
  by artist: Ingrid Kertesi
  by artist: Hungarian Operetta Orchestra
  by artist: Laszlo Kovacs
  in album: Best of Operetta, Vol. 1
    type: MusicAlbum
    date published: 1996-11-04
  isrc code: HKI199613807
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  additional property: OTSVerificationAPI
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  additional property: OTSTimestamp
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  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
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    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422cedb4645a812068839007a47c45903332af5ce843c8241925a195718c0b86. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKI199613807.
    date published: 2026-07-02T03:55:08Z
  audio: Fruhlingsstimmen (Voices of Spring), Op. 410
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    additional property: Valence (Positivity)
    additional property: Loudness (dB)
    additional property: Key Name
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Valence (Positivity)
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value: 0.2

Loudness (dB)
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value: -24.666

Key Name
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Mode Name
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