Ekaterina Siurina
type: MusicGroup
genre: opera
description: Ekaterina Siurina (; born 2 May 1975) is a Russian operatic soprano. Life Born in Swerdlowsk, Siurina studied voice at the Russian Institute of Theatre Arts. She made her stage debut during her stu
popularity: 4
followers: 208
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1cfe41c5e31fa8f02945cbb1f195a13c619d534f6341acfaad47e1078021d7f1
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954705
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954705
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/edbbe438-146c-4a84-b10e-59856f9a2995.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/edbbe438-146c-4a84-b10e-59856f9a2995.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/edbbe438-146c-4a84-b10e-59856f9a2995
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T13:42:37Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1cfe41c5e31fa8f02945cbb1f195a13c619d534f6341acfaad47e1078021d7f1","name":"Ekaterina Siurina","registered_at":"2026-06-21T11:26:25Z","symbol":"NIM1910721","token_address":"0x812aa79b542737e2c4441d00d3a09bb837e77c87","type":"artist","uuid":"edbbe438-146c-4a84-b10e-59856f9a2995"}
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 0x1cfe41c5e31fa8f02945cbb1f195a13c619d534f6341acfaad47e1078021d7f1. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/edbbe438-146c-4a84-b10e-59856f9a2995.json and https://artists.proofprofile.net/proofs/artist/edbbe438-146c-4a84-b10e-59856f9a2995.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T13:42:37Z
  text: {"copyright_id":"0x1cfe41c5e31fa8f02945cbb1f195a13c619d534f6341acfaad47e1078021d7f1","name":"Ekaterina Siurina","registered_at":"2026-06-21T11:26:25Z","symbol":"NIM1910721","token_address":"0x812aa79b542737e2c4441d00d3a09bb837e77c87","type":"artist","uuid":"edbbe438-146c-4a84-b10e-59856f9a2995"}
album: Ekaterina Siurina: Amore e Morte
  type: MusicAlbum
  date published: 2013-11-05
album: Ekaterina Siurina: Amore e Morte
  type: MusicAlbum
  date published: 2013-11-05
album: Amour éternel
  type: MusicAlbum
  date published: 2020-06-19
album: Where is my beloved?
  type: MusicAlbum
  date published: 2023-09-22