Federico Silva
type: MusicGroup
genre: tango
description: Federico Silva (born Federico Héctor Gutiérrez Silva; 16 September 1923 – 30 November 2022) was a Mexican painter and sculptor. Biography An autodidact, Silva became the assistant of David Alfaro Siq
popularity: 3
followers: 33
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subject of: OpenTimestamps Proof of Existence
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track: Amor de verano

Amor de verano
type: MusicRecording
duration: PT2M48S
duration ms: 168672
explicit: false
by artist: Orquesta Rodolfo Biagi
by artist: Hugo Duval
by artist: Luis Stazo
by artist: Federico Silva
in album: Bar Exposición (1961-1962)
  type: MusicAlbum
  date published: 2017-05-23
genre: tango
isrc code: CA5KR1554562
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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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  date published: 2026-07-02T03:55:08Z
audio: Amor de verano
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  additional property: Key Name
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