Lena Polovecova
type: MusicGroup
genre: requiem
popularity: 3
followers: 16
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8995b7786a9f998a00c631f7d73b0c3fe3fcdd5b2569a1c4a620818843c287aa
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954569
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954569
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b2d8f605-6312-4dfa-925b-b28c3aaabe88.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b2d8f605-6312-4dfa-925b-b28c3aaabe88.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b2d8f605-6312-4dfa-925b-b28c3aaabe88
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T14:36:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x8995b7786a9f998a00c631f7d73b0c3fe3fcdd5b2569a1c4a620818843c287aa","name":"Lena Polovecova","registered_at":"2026-06-20T13:18:41Z","symbol":"NIM1619264","token_address":"0xb9688a2cbd05e965e502618c349498917ee8048e","type":"artist","uuid":"b2d8f605-6312-4dfa-925b-b28c3aaabe88"}
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 0x8995b7786a9f998a00c631f7d73b0c3fe3fcdd5b2569a1c4a620818843c287aa. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2d8f605-6312-4dfa-925b-b28c3aaabe88.json and https://artists.proofprofile.net/proofs/artist/b2d8f605-6312-4dfa-925b-b28c3aaabe88.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T14:36:29Z
  text: {"copyright_id":"0x8995b7786a9f998a00c631f7d73b0c3fe3fcdd5b2569a1c4a620818843c287aa","name":"Lena Polovecova","registered_at":"2026-06-20T13:18:41Z","symbol":"NIM1619264","token_address":"0xb9688a2cbd05e965e502618c349498917ee8048e","type":"artist","uuid":"b2d8f605-6312-4dfa-925b-b28c3aaabe88"}