Francisco Canaro & His Orchestra
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genre: tango
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track: La cancion de Buenos Aires (The Song of Buenos Aires) [1947]

La cancion de Buenos Aires (The Song of Buenos Aires) [1947]
type: MusicRecording
duration: PT2M47S
duration ms: 167973
explicit: false
by artist: Nelly Omar
by artist: Francisco Canaro & His Orchestra
in album: The best of Argentine Tango Vol. 3 / 78 rpm recordings 1927 - 1957
  type: MusicAlbum
  date published: 2008-03-06
isrc code: GRHR10738801
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additional property: OTSTimestamp
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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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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4beda723530543d850f4af0b62889a207169fa0f7f42577323b8454ad31f044. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GRHR10738801.
  date published: 2026-07-02T03:55:08Z
audio: La cancion de Buenos Aires (The Song of Buenos Aires) [1947]
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