Kat De Leon
type: MusicGroup
genre: pinoy hip hop
popularity: 2
followers: 37
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe9894084361a73fddf5a2266b6be56377d6a60e7e8869aa6944ce6b108d63efa
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/d0e9f705-a760-4880-b8ea-c325c913d146.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d0e9f705-a760-4880-b8ea-c325c913d146.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d0e9f705-a760-4880-b8ea-c325c913d146
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T02:46:24Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe9894084361a73fddf5a2266b6be56377d6a60e7e8869aa6944ce6b108d63efa","name":"Kat De Leon","registered_at":"2026-06-21T01:01:53Z","symbol":"NIM1769781","token_address":"0xcf11e172176f00ac488ab65f12249127a12f3c0c","type":"artist","uuid":"d0e9f705-a760-4880-b8ea-c325c913d146"}
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 0xe9894084361a73fddf5a2266b6be56377d6a60e7e8869aa6944ce6b108d63efa. 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/d0e9f705-a760-4880-b8ea-c325c913d146.json and https://artists.proofprofile.net/proofs/artist/d0e9f705-a760-4880-b8ea-c325c913d146.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-21T02:46:24Z
  text: {"copyright_id":"0xe9894084361a73fddf5a2266b6be56377d6a60e7e8869aa6944ce6b108d63efa","name":"Kat De Leon","registered_at":"2026-06-21T01:01:53Z","symbol":"NIM1769781","token_address":"0xcf11e172176f00ac488ab65f12249127a12f3c0c","type":"artist","uuid":"d0e9f705-a760-4880-b8ea-c325c913d146"}
album: Hanggang Ngayon
  type: MusicAlbum
  date published: 2019-09-10
album: Paraluman
  type: MusicAlbum
  date published: 2019-10-03