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genre: chamber music
genre: minimalism
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track: Violin Concerto No. 2 "The American Four Seasons": II. —
track: Violin Concerto No. 2 "The American Four Seasons": III. —
track: Violin Concerto No. 2 "The American Four Seasons": IV. —
track: Violin Concerto No. 2 "The American Four Seasons": I. —

Violin Concerto No. 2 "The American Four Seasons": II. —
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by artist: Philip Glass
by artist: Piotr Plawner
by artist: Bern Chamber Orchestra
by artist: Philippe Bach
in album: Glass: Violin Concerto No. 2 "The American Four Seasons" & Violin Sonata
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  date published: 2020-01-24
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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
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Violin Concerto No. 2 "The American Four Seasons": II. —
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Violin Concerto No. 2 "The American Four Seasons": III. —
type: MusicRecording
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by artist: Philip Glass
by artist: Piotr Plawner
by artist: Bern Chamber Orchestra
by artist: Philippe Bach
in album: Glass: Violin Concerto No. 2 "The American Four Seasons" & Violin Sonata
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
audio: Violin Concerto No. 2 "The American Four Seasons": III. —
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Violin Concerto No. 2 "The American Four Seasons": IV. —
type: MusicRecording
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by artist: Piotr Plawner
by artist: Bern Chamber Orchestra
by artist: Philippe Bach
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  date published: 2026-07-08T08:56:20Z
audio: Violin Concerto No. 2 "The American Four Seasons": IV. —
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Violin Concerto No. 2 "The American Four Seasons": I. —
type: MusicRecording
duration: PT6M12S
duration ms: 372880
explicit: false
by artist: Philip Glass
by artist: Piotr Plawner
by artist: Bern Chamber Orchestra
by artist: Philippe Bach
in album: Glass: Violin Concerto No. 2 "The American Four Seasons" & Violin Sonata
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T19:11:09Z
audio: Violin Concerto No. 2 "The American Four Seasons": I. —
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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