Katherine Yu
type: MusicGroup
genre: chinese r&b
genre: c-pop
genre: gufeng
popularity: 6
followers: 14
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8878d78b00088c32097eea45b9250b2e7da3f1cd42b1f57f79872c09aaf17265
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954615
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954615
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c69fd4e4-4151-40b1-9008-56d2e4376ea2.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c69fd4e4-4151-40b1-9008-56d2e4376ea2.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c69fd4e4-4151-40b1-9008-56d2e4376ea2
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T22:44:50Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x8878d78b00088c32097eea45b9250b2e7da3f1cd42b1f57f79872c09aaf17265","name":"Katherine Yu","registered_at":"2026-06-20T21:27:06Z","symbol":"NIM1718026","token_address":"0x0c175f8f17b18ea74e31ea85c91eb8c89a52d2b7","type":"artist","uuid":"c69fd4e4-4151-40b1-9008-56d2e4376ea2"}
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 0x8878d78b00088c32097eea45b9250b2e7da3f1cd42b1f57f79872c09aaf17265. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c69fd4e4-4151-40b1-9008-56d2e4376ea2.json and https://artists.proofprofile.net/proofs/artist/c69fd4e4-4151-40b1-9008-56d2e4376ea2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T22:44:50Z
  text: {"copyright_id":"0x8878d78b00088c32097eea45b9250b2e7da3f1cd42b1f57f79872c09aaf17265","name":"Katherine Yu","registered_at":"2026-06-20T21:27:06Z","symbol":"NIM1718026","token_address":"0x0c175f8f17b18ea74e31ea85c91eb8c89a52d2b7","type":"artist","uuid":"c69fd4e4-4151-40b1-9008-56d2e4376ea2"}