Halina Zykrata
type: MusicGroup
genre: choral
genre: gregorian chant
popularity: 2
followers: 189
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2d8705f83500a3e20474550f07a760f27a13aa506c0f02cb1431ab8df9970740
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954618
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954618
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c9deb740-aabc-407c-b745-b67507ea4ba1.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c9deb740-aabc-407c-b745-b67507ea4ba1.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c9deb740-aabc-407c-b745-b67507ea4ba1
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T23:05:13Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x2d8705f83500a3e20474550f07a760f27a13aa506c0f02cb1431ab8df9970740","name":"Halina Zykrata","registered_at":"2026-06-20T22:20:45Z","symbol":"NIM1733005","token_address":"0x0f7447e2178f196135f52f31ae41601d03e0c0b6","type":"artist","uuid":"c9deb740-aabc-407c-b745-b67507ea4ba1"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8705f83500a3e20474550f07a760f27a13aa506c0f02cb1431ab8df9970740. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9deb740-aabc-407c-b745-b67507ea4ba1.json and https://artists.proofprofile.net/proofs/artist/c9deb740-aabc-407c-b745-b67507ea4ba1.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-20T23:05:13Z
  text: {"copyright_id":"0x2d8705f83500a3e20474550f07a760f27a13aa506c0f02cb1431ab8df9970740","name":"Halina Zykrata","registered_at":"2026-06-20T22:20:45Z","symbol":"NIM1733005","token_address":"0x0f7447e2178f196135f52f31ae41601d03e0c0b6","type":"artist","uuid":"c9deb740-aabc-407c-b745-b67507ea4ba1"}