Zara Nelsova
type: MusicGroup
genre: classical
description: Zara Nelsova (December 23, 1918October 10, 2002) was a prominent cellist. Biography Nelsova was born as Sara Katznelson in Winnipeg, Canada, to parents of Jewish-Russian descent. Nelsova first perfor
popularity: 8
followers: 748
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb96bb8c10ebfeebd9133401a061fa192811849c627da57735a9c36cf87ac29eb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  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/57693d9e-817a-4e55-bbe5-b9345ff242e0.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/57693d9e-817a-4e55-bbe5-b9345ff242e0.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/57693d9e-817a-4e55-bbe5-b9345ff242e0
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xb96bb8c10ebfeebd9133401a061fa192811849c627da57735a9c36cf87ac29eb","name":"Zara Nelsova","registered_at":"2026-06-16T20:02:17Z","symbol":"NIM1160352","token_address":"0x403d6a31b49fb251fc3c4338d5f816b18d1218ea","type":"artist","uuid":"57693d9e-817a-4e55-bbe5-b9345ff242e0"}
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 0xb96bb8c10ebfeebd9133401a061fa192811849c627da57735a9c36cf87ac29eb. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57693d9e-817a-4e55-bbe5-b9345ff242e0.json and https://artists.proofprofile.net/proofs/artist/57693d9e-817a-4e55-bbe5-b9345ff242e0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xb96bb8c10ebfeebd9133401a061fa192811849c627da57735a9c36cf87ac29eb","name":"Zara Nelsova","registered_at":"2026-06-16T20:02:17Z","symbol":"NIM1160352","token_address":"0x403d6a31b49fb251fc3c4338d5f816b18d1218ea","type":"artist","uuid":"57693d9e-817a-4e55-bbe5-b9345ff242e0"}
album: Cello Concertos
  type: MusicAlbum
  date published: 2018-11-30