馬箏 Katrina
type: MusicGroup
popularity: 15
followers: 20
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x814a04169c39d07628f973f478505a0e8f2a7c7964cba84da75f930c679f7606
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953786
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953786
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d9ed8a9c-ecdf-4303-a762-6c7e0d9f6b04.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d9ed8a9c-ecdf-4303-a762-6c7e0d9f6b04.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d9ed8a9c-ecdf-4303-a762-6c7e0d9f6b04
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T12:56:12Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x814a04169c39d07628f973f478505a0e8f2a7c7964cba84da75f930c679f7606","name":"馬箏 Katrina","registered_at":"2026-06-15T03:30:14Z","symbol":"NIM0668206","token_address":"0xe38b46bd8a2d3037ebb3ddc6075af310fca219f7","type":"artist","uuid":"d9ed8a9c-ecdf-4303-a762-6c7e0d9f6b04"}
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 0x814a04169c39d07628f973f478505a0e8f2a7c7964cba84da75f930c679f7606. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9ed8a9c-ecdf-4303-a762-6c7e0d9f6b04.json and https://artists.proofprofile.net/proofs/artist/d9ed8a9c-ecdf-4303-a762-6c7e0d9f6b04.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T12:56:12Z
  text: {"copyright_id":"0x814a04169c39d07628f973f478505a0e8f2a7c7964cba84da75f930c679f7606","name":"馬箏 Katrina","registered_at":"2026-06-15T03:30:14Z","symbol":"NIM0668206","token_address":"0xe38b46bd8a2d3037ebb3ddc6075af310fca219f7","type":"artist","uuid":"d9ed8a9c-ecdf-4303-a762-6c7e0d9f6b04"}
album: 祢是全能真神
  type: MusicAlbum
  date published: 2025-01-31