Eva Knardahl
type: MusicGroup
genre: classical
genre: classical piano
description: thumb|Kåre Opdal, Eva Knardahl, (conductor) (l-r) (1970) Eva Knardahl Freiwald (10 May 1927 – 3 September 2006) was a Norwegian pianist, with a noted career both as a child prodigy and adult performe
popularity: 16
followers: 679
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953770
additional property: OTSProofURL
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  value: https://artists.proofprofile.net/proofs/artist/c3c02d26-7670-4066-89ca-d345bd15a3ae.ots
additional property: OTSRecordURL
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additional property: OTSVerificationAPI
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  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c3c02d26-7670-4066-89ca-d345bd15a3ae
additional property: OTSTimestamp
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additional property: OTSCanonicalRecord
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 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. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
subject of: OpenTimestamps Proof of Existence
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  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd959c2c76a799228da513707460f6b913ff98f9ca0296241e5ae44da66a31d. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3c02d26-7670-4066-89ca-d345bd15a3ae.json and https://artists.proofprofile.net/proofs/artist/c3c02d26-7670-4066-89ca-d345bd15a3ae.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T09:50:11Z
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album: Norwegian Music for the Piano
  type: MusicAlbum
  date published: 1981
album: Rimsky-Korsakov / Beethoven: Piano Quintets / Berwald: Piano Quartet
  type: MusicAlbum
  date published: 1993-03-31
album: Rimsky-Korsakov / Beethoven: Piano Quintets / Berwald: Piano Quartet
  type: MusicAlbum
  date published: 1993-03-31
album: Albéniz/ Barber/ Liszt/ Gershwin
  type: MusicAlbum
  date published: 1995
album: Albéniz/ Barber/ Liszt/ Gershwin
  type: MusicAlbum
  date published: 1995
album: Great Norwegian Performers 1945-2000, Vol. Ii
  type: MusicAlbum
  date published: 2008-06-16
album: Great Norwegian Performers 1945-2000, Vol. Ii
  type: MusicAlbum
  date published: 2008-06-16