Alexander Spendiarov
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-17T18:27:28Z
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album: Alexander Spendiarov: Crimean Sketches, Op. 9
  type: MusicAlbum
  date published: 2014-04-02
album: Spendiarov: Three Palms, Symphonic Poem, Op. 10 (Digitally Remastered)
  type: MusicAlbum
  date published: 2014-06-29
album: Alexander Spendiarov: Crimean Sketches, Op. 9
  type: MusicAlbum
  date published: 2020-11-02
album: Spendiarov: Complete Piano Works & Chamber Works with Piano
  type: MusicAlbum
  date published: 2021-01-15
  track: Berceuse, Op. 3 No. 2 (Version for Piano)
album: Spendiarov: Complete Piano Works & Chamber Works with Piano
  type: MusicAlbum
  date published: 2021-01-15

Berceuse, Op. 3 No. 2 (Version for Piano)
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duration: PT3M16S
duration ms: 196613
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by artist: Alexander Spendiarov
in album: Spendiarov: Complete Piano Works & Chamber Works with Piano
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  date published: 2021-01-15
isrc code: HKI192035113
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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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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2013ac18a60aeb9632f66f5230b42fca9ad47ea4c4fff53da108921dbd3db57c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI192035113.
  date published: 2026-07-02T03:30:09Z
audio: Berceuse, Op. 3 No. 2 (Version for Piano)
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