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type: MusicGroup
genre: opera
genre: requiem
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followers: 88
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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: 2026-06-20T23:40:06Z
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track: Requiem in D Minor, K. 626 (Completed by F.X. Süssmayr): Sequence No. 4: Recordare, Jesu pie (Soprano, Mezzo-soprano, Tenor, Baritone)
track: Requiem in D Minor, K. 626 (Completed by F.X. Süssmayr): Sequence No. 2: Tuba mirum (Soprano, Mezzo-soprano, Tenor, Baritone)
track: Requiem in D Minor, K. 626 (Completed by F.X. Süssmayr): Offertory No. 1: Domine Jesu Christe (Chorus)
track: Requiem in D Minor, K. 626 (Completed by F.X. Süssmayr): Benedictus (Soprano, Mezzo-soprano, Tenor, Baritone)

Requiem in D Minor, K. 626 (Completed by F.X. Süssmayr): Sequence No. 4: Recordare, Jesu pie (Soprano, Mezzo-soprano, Tenor, Baritone)
type: MusicRecording
duration: PT5M24S
duration ms: 324493
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Olga Pasichnyk
by artist: Anna Lubanska
by artist: Krzysztof Szmyt
by artist: Krzysztof Borysiewicz
by artist: Sinfonia Amabile Orchestra
by artist: Piotr Wajrak
in album: Mozart: Requiem in D Minor, K. 626
  type: MusicAlbum
  date published: 2015-11-06
popularity: 2
genre: classical
genre: classical-era
isrc code: PLA161521006
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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
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Requiem in D Minor, K. 626 (Completed by F.X. Süssmayr): Sequence No. 4: Recordare, Jesu pie (Soprano, Mezzo-soprano, Tenor, Baritone)
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Requiem in D Minor, K. 626 (Completed by F.X. Süssmayr): Sequence No. 2: Tuba mirum (Soprano, Mezzo-soprano, Tenor, Baritone)
type: MusicRecording
duration: PT3M54S
duration ms: 234386
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Olga Pasichnyk
by artist: Anna Lubanska
by artist: Krzysztof Szmyt
by artist: Krzysztof Borysiewicz
by artist: Łukasz Hodor
by artist: Sinfonia Amabile Orchestra
by artist: Piotr Wajrak
in album: Mozart: Requiem in D Minor, K. 626
  type: MusicAlbum
  date published: 2015-11-06
popularity: 2
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T05:23:41Z
audio: Requiem in D Minor, K. 626 (Completed by F.X. Süssmayr): Sequence No. 2: Tuba mirum (Soprano, Mezzo-soprano, Tenor, Baritone)
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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

Requiem in D Minor, K. 626 (Completed by F.X. Süssmayr): Offertory No. 1: Domine Jesu Christe (Chorus)
type: MusicRecording
duration: PT3M20S
duration ms: 200520
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Olga Pasichnyk
by artist: Anna Lubanska
by artist: Krzysztof Szmyt
by artist: Krzysztof Borysiewicz
by artist: Sinfonia Amabile Choir
by artist: Sinfonia Amabile Orchestra
by artist: Piotr Wajrak
in album: Mozart: Requiem in D Minor, K. 626
  type: MusicAlbum
  date published: 2015-11-06
popularity: 2
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T21:00:46Z
audio: Requiem in D Minor, K. 626 (Completed by F.X. Süssmayr): Offertory No. 1: Domine Jesu Christe (Chorus)
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additional property: OTSTimestamp
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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

Requiem in D Minor, K. 626 (Completed by F.X. Süssmayr): Benedictus (Soprano, Mezzo-soprano, Tenor, Baritone)
type: MusicRecording
duration: PT5M19S
duration ms: 319573
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Olga Pasichnyk
by artist: Anna Lubanska
by artist: Krzysztof Szmyt
by artist: Krzysztof Borysiewicz
by artist: Sinfonia Amabile Choir
by artist: Sinfonia Amabile Orchestra
by artist: Piotr Wajrak
in album: Mozart: Requiem in D Minor, K. 626
  type: MusicAlbum
  date published: 2015-11-06
popularity: 2
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T21:25:57Z
audio: Requiem in D Minor, K. 626 (Completed by F.X. Süssmayr): Benedictus (Soprano, Mezzo-soprano, Tenor, Baritone)
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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