Petra Hapkova
type: MusicGroup
popularity: 4
followers: 104
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd67df390790259cd8afc57dee899eb1e0cdaf3cbac699946efc4645a5eb585da
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954346
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954346
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/947af187-0750-47b2-a3ca-a94c1c343d2e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/947af187-0750-47b2-a3ca-a94c1c343d2e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/947af187-0750-47b2-a3ca-a94c1c343d2e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:51:26Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd67df390790259cd8afc57dee899eb1e0cdaf3cbac699946efc4645a5eb585da","name":"Petra Hapkova","registered_at":"2026-06-17T17:13:20Z","symbol":"NIM1463493","token_address":"0x408c9a43a657e4d959f6769ba91c4a2e19b5043e","type":"artist","uuid":"947af187-0750-47b2-a3ca-a94c1c343d2e"}
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 0xd67df390790259cd8afc57dee899eb1e0cdaf3cbac699946efc4645a5eb585da. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/947af187-0750-47b2-a3ca-a94c1c343d2e.json and https://artists.proofprofile.net/proofs/artist/947af187-0750-47b2-a3ca-a94c1c343d2e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:51:26Z
  text: {"copyright_id":"0xd67df390790259cd8afc57dee899eb1e0cdaf3cbac699946efc4645a5eb585da","name":"Petra Hapkova","registered_at":"2026-06-17T17:13:20Z","symbol":"NIM1463493","token_address":"0x408c9a43a657e4d959f6769ba91c4a2e19b5043e","type":"artist","uuid":"947af187-0750-47b2-a3ca-a94c1c343d2e"}
album: Hapkova zpiva Hapku - Kdo jinej nez ja
  type: MusicAlbum
  date published: 2018-04-13