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genre: opera
description: Klaus Hirte (28 December 1937 – 15 August 2002) was a German operatic baritone. Life Training Born in Berlin, Hirte grew up in Calw, learned the profession of tool and die maker and occasionally
popularity: 10
followers: 23
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    subject of: OpenTimestamps Proof of Existence
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  track: Le nozze di Figaro, K. 492, Act I: No. 4, La vendetta, oh, la vendetta!
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-07T18:39:05Z
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  track: Le nozze di Figaro, K. 492, Act II: No. 11, Porgi amor
  track: Le nozze di Figaro, K. 492, Act II: No. 12, Voi che sapete
  track: Le nozze di Figaro, K. 492, Act III: No. 21, Sull' aria... Che soave zeffiretto "Letter Duet"
  track: Le nozze di Figaro, K. 492, Act IV: No. 28a, Giunse alfin il momento
  track: Le nozze di Figaro, K. 492, Act IV: No. 29e-g, Finale. Gente, gente, all'armi... Questo giorno di tormenti

Le nozze di Figaro, K. 492, Act IV: No. 29e-g, Finale. Gente, gente, all'armi... Questo giorno di tormenti
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by artist: Orchester der Deutschen Oper Berlin
by artist: Karl Böhm
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  date published: 1968-01-01
genre: classical
genre: classical-era
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-29T23:39:29Z
audio: Le nozze di Figaro, K. 492, Act IV: No. 29e-g, Finale. Gente, gente, all'armi... Questo giorno di tormenti
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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

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Le nozze di Figaro, K. 492, Act II: No. 11, Porgi amor
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-07T18:50:38Z
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Le nozze di Figaro, K. 492, Act II: No. 12, Voi che sapete
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:55:08Z
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Le nozze di Figaro, K. 492, Act III: No. 21, Sull' aria... Che soave zeffiretto "Letter Duet"
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Le nozze di Figaro, K. 492, Act IV: No. 28a, Giunse alfin il momento
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