Daria Spiridonova
type: MusicGroup
description: Daria Sergeyevna Nagornaya (née Spiridonova ; born 8 July 1998) is a Russian former artistic gymnast. Primarily an uneven bars specialist, she is the 2015 World Champion, the 2015 European Champion,
popularity: 4
followers: 40
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9942173ff13c69197b23eed0070821e7df57a0d9d16a220ec3acd845b76e678d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954631
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954631
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d0d74dc0-ba6d-44fe-a89a-a10d3ac1b228.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d0d74dc0-ba6d-44fe-a89a-a10d3ac1b228.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d0d74dc0-ba6d-44fe-a89a-a10d3ac1b228
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T02:46:24Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x9942173ff13c69197b23eed0070821e7df57a0d9d16a220ec3acd845b76e678d","name":"Daria Spiridonova","registered_at":"2026-06-21T00:48:49Z","symbol":"NIM1766961","token_address":"0x130dc378d36114368e4ed4b524272cb2d1d59882","type":"artist","uuid":"d0d74dc0-ba6d-44fe-a89a-a10d3ac1b228"}
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 0x9942173ff13c69197b23eed0070821e7df57a0d9d16a220ec3acd845b76e678d. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0d74dc0-ba6d-44fe-a89a-a10d3ac1b228.json and https://artists.proofprofile.net/proofs/artist/d0d74dc0-ba6d-44fe-a89a-a10d3ac1b228.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T02:46:24Z
  text: {"copyright_id":"0x9942173ff13c69197b23eed0070821e7df57a0d9d16a220ec3acd845b76e678d","name":"Daria Spiridonova","registered_at":"2026-06-21T00:48:49Z","symbol":"NIM1766961","token_address":"0x130dc378d36114368e4ed4b524272cb2d1d59882","type":"artist","uuid":"d0d74dc0-ba6d-44fe-a89a-a10d3ac1b228"}