New York Piano Quartet
type: MusicGroup
genre: chamber music
popularity: 3
followers: 32
additional property: CopyrightID
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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/953976
additional property: OTSProofURL
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  value: https://artists.proofprofile.net/proofs/artist/2b4a68c4-45a8-4532-a1f7-0644a3b2b44e.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/2b4a68c4-45a8-4532-a1f7-0644a3b2b44e
additional property: OTSTimestamp
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  value: 2026-06-16T16:55:36Z
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 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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4922eef49830405ade717c8f97cac4079a3f27fc1afeab0ff168ce824ca4b0b3. Chain 2 (Bitcoin): anchored in block 953976 (2026-06-16T16:55:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b4a68c4-45a8-4532-a1f7-0644a3b2b44e.json and https://artists.proofprofile.net/proofs/artist/2b4a68c4-45a8-4532-a1f7-0644a3b2b44e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T16:55:36Z
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album: Songs for Mahler in the Absence of Words
  type: MusicAlbum
  date published: 2012
album: Songs for Mahler in the Absence of Words
  type: MusicAlbum
  date published: 2012
album: Songs for Mahler in the Absence of Words
  type: MusicAlbum
  date published: 2012-09-25
album: Marx: Rhapsodie / Korngold: Suite
  type: MusicAlbum
  date published: 2013-01-29
album: Mahler: Quartet for Piano and Strings
  type: MusicAlbum
  date published: 2017-12-15
album: Best of the New York Piano Quartet
  type: MusicAlbum
  date published: 2021-02-19
album: Best of the New York Piano Quartet
  type: MusicAlbum
  date published: 2021-02-19