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genre: classical
genre: classical piano
description: Géza Anda (; 19 November 192113 June 1976) was a Swiss-Hungarian pianist. A celebrated interpreter of classical and romantic repertoire, particularly for performances and recordings of Mozart, he was
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album: Ferenc Fricsay conducts Béla Bartok - The early RIAS recordings (live and studio recordings from Berlin, 1950-1953)
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Waltz No. 6 in D flat major, Op. 64/1, "Minute Waltz"
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Waltz No. 1 in E flat major, Op. 18, "Grande valse brillante"
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Piano Concerto No. 21: Andante - Excerpt
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Piano Concerto No. 21 in C Major, K. 467: II. Andante "Elvira Madigan"
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additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
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 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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b9c3dd41a058beba3a36f404fc424ba6dcae339e479f27d930034e92c4d91b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEF056100241.
  date published: 2026-07-08T03:20:19Z
audio: Piano Concerto No. 21 in C Major, K. 467: II. Andante "Elvira Madigan"
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 169.059
  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.17
  additional property: Energy
    type: PropertyValue
    value: 0.059
  additional property: Speechiness
    type: PropertyValue
    value: 0.033
  additional property: Acousticness
    type: PropertyValue
    value: 0.975
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.955
  additional property: Liveness
    type: PropertyValue
    value: 0.094
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.102
  additional property: Loudness (dB)
    type: PropertyValue
    value: -25.79
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Major