Katia Spassova
type: MusicGroup
popularity: 9
followers: 4
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc2e01381606ab8deaa6f9e8f7954588b43c24c7fa53f9a84f3158dbf4e8c3375
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953842
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953842
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/007f59a5-63a7-44bd-bb12-72c47220205f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/007f59a5-63a7-44bd-bb12-72c47220205f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/007f59a5-63a7-44bd-bb12-72c47220205f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T22:22:30Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc2e01381606ab8deaa6f9e8f7954588b43c24c7fa53f9a84f3158dbf4e8c3375","name":"Katia Spassova","registered_at":"2026-06-15T13:45:01Z","symbol":"NIM0726621","token_address":"0xa13b1cce52d94983ee6d43c6b44c521742af5fda","type":"artist","uuid":"007f59a5-63a7-44bd-bb12-72c47220205f"}
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 0xc2e01381606ab8deaa6f9e8f7954588b43c24c7fa53f9a84f3158dbf4e8c3375. Chain 2 (Bitcoin): anchored in block 953844 (2026-06-15T22:28:08Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/007f59a5-63a7-44bd-bb12-72c47220205f.json and https://artists.proofprofile.net/proofs/artist/007f59a5-63a7-44bd-bb12-72c47220205f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T22:28:08Z
  text: {"copyright_id":"0xc2e01381606ab8deaa6f9e8f7954588b43c24c7fa53f9a84f3158dbf4e8c3375","name":"Katia Spassova","registered_at":"2026-06-15T13:45:01Z","symbol":"NIM0726621","token_address":"0xa13b1cce52d94983ee6d43c6b44c521742af5fda","type":"artist","uuid":"007f59a5-63a7-44bd-bb12-72c47220205f"}