Anna Barova
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genre: choral
genre: opera
genre: requiem
popularity: 3
followers: 6
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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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-17T08:11:48Z
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track: Requiem. Missa pro defunctis: Sequentia. Dies irae
track: Requiem. Missa pro defunctis: Sequentia. Rex tremendae majestatis

Requiem. Missa pro defunctis: Sequentia. Dies irae
type: MusicRecording
duration: PT1M3S
duration ms: 63133
explicit: false
by artist: Antoine Reicha
by artist: Venceslava Hruba-Freiberger
by artist: Anna Barova
by artist: Vladimir Dolezal
by artist: Luděk Vele
by artist: Dvořák Chamber Orchestra
by artist: Prague Philharmonic Choir
by artist: Lubomir Matl
by artist: Jaroslav Tvrzsky
in album: Rejcha: Requiem
  type: MusicAlbum
  date published: 2005-09-26
isrc code: CZA168905270
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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
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:53:27Z
audio: Requiem. Missa pro defunctis: Sequentia. Dies irae
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Requiem. Missa pro defunctis: Sequentia. Rex tremendae majestatis
type: MusicRecording
duration: PT1M42S
duration ms: 102533
explicit: false
by artist: Antoine Reicha
by artist: Venceslava Hruba-Freiberger
by artist: Anna Barova
by artist: Vladimir Dolezal
by artist: Luděk Vele
by artist: Dvořák Chamber Orchestra
by artist: Prague Philharmonic Choir
by artist: Lubomir Matl
by artist: Jaroslav Tvrzsky
in album: Rejcha: Requiem
  type: MusicAlbum
  date published: 2005-09-26
isrc code: CZA168908270
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Requiem. Missa pro defunctis: Sequentia. Rex tremendae majestatis
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