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description: Anna Feodorovna Volkova (; died 1876) was a Russian chemist known for her work in organic chemistry. Volkova was the first chemist to prepare pure ortho-toluene sulfonic acid, its acyl chloride, and i
popularity: 8
followers: 557
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subject of: OpenTimestamps Proof of Existence
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album: Ёлки
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album: Мама
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  date published: 2024-03-22
  track: У твоего сердца
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    subject of: OpenTimestamps Proof of Existence
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album: Мама
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album: Мама
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album: Папочка, вернись!
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album: НЕ ЗАБЫВАЙТЕ
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album: Танцы под дождём
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album: Новогодняя ночь
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album: DLE YAMAN
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album: DLE YAMAN
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album: Снегурочка
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album: Дальше звёзд
album: БЕССМЕРТНЫЙ ПОЛК
album: ПО ПОЛЮ
album: Welcome to Mama Russia
album: Команда молодости нашей

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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

OpenTimestamps Proof of Existence
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date published: 2026-07-21T07:04:12Z

Снегурочка
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Дальше звёзд
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-20T02:22:58Z
  audio: Дальше звёзд
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БЕССМЕРТНЫЙ ПОЛК
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date published: 2025-05-06

ПО ПОЛЮ
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Welcome to Mama Russia
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Команда молодости нашей
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