Ekaterina Semenchuk
type: MusicGroup
genre: opera
description: Ekaterina Semenchuk (born 24 March 1976, in Minsk), is a Belarusian operatic mezzo-soprano. Career Ekaterina Semenchuk studied at the Rimsky-Korsakov Saint Petersburg State Conservatory. She made her
popularity: 2
followers: 88
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2f3b880ff341a2e2282dff05178f5ca3920537f488bff4f0e8f776f3aa6e644b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953907
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953907
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/15f5d4ba-6350-4575-ab57-6e152f7007e7.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/15f5d4ba-6350-4575-ab57-6e152f7007e7.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/15f5d4ba-6350-4575-ab57-6e152f7007e7
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T07:39:24Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x2f3b880ff341a2e2282dff05178f5ca3920537f488bff4f0e8f776f3aa6e644b","name":"Ekaterina Semenchuk","registered_at":"2026-06-15T21:05:19Z","symbol":"NIM0831686","token_address":"0xd4001ea476c4ed53fd02e1ac6ed59c3e75947a87","type":"artist","uuid":"15f5d4ba-6350-4575-ab57-6e152f7007e7"}
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 0x2f3b880ff341a2e2282dff05178f5ca3920537f488bff4f0e8f776f3aa6e644b. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15f5d4ba-6350-4575-ab57-6e152f7007e7.json and https://artists.proofprofile.net/proofs/artist/15f5d4ba-6350-4575-ab57-6e152f7007e7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T07:39:24Z
  text: {"copyright_id":"0x2f3b880ff341a2e2282dff05178f5ca3920537f488bff4f0e8f776f3aa6e644b","name":"Ekaterina Semenchuk","registered_at":"2026-06-15T21:05:19Z","symbol":"NIM0831686","token_address":"0xd4001ea476c4ed53fd02e1ac6ed59c3e75947a87","type":"artist","uuid":"15f5d4ba-6350-4575-ab57-6e152f7007e7"}