Markus Werba
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description: Markus Werba (born 14 November 1973) is an Austrian baritone opera singer.bbc.co.uk Biography from BBC Biography Born in Hermagor Carinthia, Austria, Werba began his vocal training aged 16. He studie
popularity: 2
followers: 4
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  date published: 2026-06-17T04:56:08Z
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track: Haydn: The Creation, Hob. XXI:2, Pt. 3: No. 30, Duett mit Chor. "Von deiner Güt, o Herr und Gott" (Eva, Adam, Chor)
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  by artist: Joseph Haydn
  by artist: Les Arts Florissants
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  by artist: Sophie Karthäuser
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    date published: 2007-11-12
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-08T03:20:19Z
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track: Haydn: The Creation, Hob. XXI:2, Pt. 3: No. 34, Schlusschor. "Singt dem Herren alle Stimmen" (Chor)
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  by artist: Les Arts Florissants
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  by artist: Sophie Karthäuser
  by artist: Toby Spence
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    date published: 2007-11-12
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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
  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-31T03:15:04Z
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