Cathy Berberian
type: MusicGroup
genre: avant-garde
description: Catherine Anahid Berberian (July 4, 1925 – March 6, 1983) was an American mezzo-soprano and composer based in Italy. She worked closely with many contemporary avant-garde music composers, including Lu
popularity: 9
followers: 1928
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/55c4bc84-8643-43c4-9833-d69a7b38d936.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/55c4bc84-8643-43c4-9833-d69a7b38d936.json
additional property: OTSVerificationAPI
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  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/55c4bc84-8643-43c4-9833-d69a7b38d936
additional property: OTSTimestamp
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  value: 2026-06-17T08:10:43Z
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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2998676e36d231023c28d886c856b3d8d554bc8439cf16d91edb765dcd842324. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55c4bc84-8643-43c4-9833-d69a7b38d936.json and https://artists.proofprofile.net/proofs/artist/55c4bc84-8643-43c4-9833-d69a7b38d936.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
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album: Cathy Pop Art Berberian
  type: MusicAlbum
  date published: 1960
album: magnifiCathy - The Many Voices of Cathy Berberian
  type: MusicAlbum
  date published: 1971
album: Wie einst in schöner'n Tagen - Salonmusik der Belle Epoque
  type: MusicAlbum
  date published: 1976
album: MagnifiCathy - The Many Voices of Cathy Berberian
  type: MusicAlbum
  date published: 1988
album: Folk Songs of the World
  type: MusicAlbum
  date published: 2016-04-01
album: Folk Songs of the World
  type: MusicAlbum
  date published: 2016-04-01