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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-16T04:12:47Z
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track: Die Zauberflöte, K. 620, Teil I: 1. Auftritt. Nr. 1 Introduktion. Aria: "Zu Hilfe! Zu Hilfe!" (Tamino, die drei Damen)
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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
  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-08T03:20:19Z
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-02T03:55:08Z
  audio: Die Zauberflöte, K. 620, Teil I: No. 1, Introduction "Zu Hilfe: Zu Hilfe!" (Tamino)
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track: Die Zauberflöte, K. 620, Teil I: No. 2, "He da!" (Tamino) - Auftritt (Die drei Damen, Papageno, Tamino)
track: Die Zauberflöte, K. 620, Teil I: No. 3, Auftritt (Die drei Damen, Papageno, Tamino) - "Rüste dich mit Mut und Standhaftigkeit" (Erste Dame)
track: Die Zauberflöte, K. 620, Teil I: No. 4, Auftritt - No. 5, Quintett "Hm! Hm! Hm!" (Papageno) - Auftritt (Die drei Damen, Papageno, Tamino) - "Die Königin begnadigt dich" (Erste Dame)
track: Die Zauberflöte, K. 620, Teil II: No. 11, Auftritt (Die drei Damen, Papageno, Tamino) - No. 12, Quintett "Wie? Wie? Wie?" (Die drei Damen)
track: Die Zauberflöte, K. 620, Teil II: No. 15, Auftritt (Sprecher, Zweiter Priester) - Auftritt (Tamino, Papageno) - Auftritt (Papageno, Weib)

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Die Zauberflöte, K. 620, Teil I: No. 2, "He da!" (Tamino) - Auftritt (Die drei Damen, Papageno, Tamino)
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by artist: Isabelle Druet
by artist: Daniel Schmutzhard
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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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-29T14:28:24Z
audio: Die Zauberflöte, K. 620, Teil I: No. 2, "He da!" (Tamino) - Auftritt (Die drei Damen, Papageno, Tamino)
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Die Zauberflöte, K. 620, Teil I: No. 3, Auftritt (Die drei Damen, Papageno, Tamino) - "Rüste dich mit Mut und Standhaftigkeit" (Erste Dame)
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by artist: Daniel Schmutzhard
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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: 2026-07-30T08:30:10Z
audio: Die Zauberflöte, K. 620, Teil I: No. 3, Auftritt (Die drei Damen, Papageno, Tamino) - "Rüste dich mit Mut und Standhaftigkeit" (Erste Dame)
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Die Zauberflöte, K. 620, Teil I: No. 4, Auftritt - No. 5, Quintett "Hm! Hm! Hm!" (Papageno) - Auftritt (Die drei Damen, Papageno, Tamino) - "Die Königin begnadigt dich" (Erste Dame)
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-22T15:38:35Z
audio: Die Zauberflöte, K. 620, Teil I: No. 4, Auftritt - No. 5, Quintett "Hm! Hm! Hm!" (Papageno) - Auftritt (Die drei Damen, Papageno, Tamino) - "Die Königin begnadigt dich" (Erste Dame)
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