宮城数江
type: MusicGroup
genre: japanese classical
genre: traditional music
popularity: 5
followers: 86
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xab7b4b740a1a89ba8ee773d997f32407a7b300c21f553be69f87f5f9e8887642
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/d0607730-17ae-4116-a472-0bcbd35ae483.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d0607730-17ae-4116-a472-0bcbd35ae483.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d0607730-17ae-4116-a472-0bcbd35ae483
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T02:46:24Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xab7b4b740a1a89ba8ee773d997f32407a7b300c21f553be69f87f5f9e8887642","name":"宮城数江","registered_at":"2026-06-21T00:37:07Z","symbol":"NIM1764179","token_address":"0x3e4ed55a42d28b05c9a6e8d4ec8a2eea3c0c77f1","type":"artist","uuid":"d0607730-17ae-4116-a472-0bcbd35ae483"}
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 0xab7b4b740a1a89ba8ee773d997f32407a7b300c21f553be69f87f5f9e8887642. 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/d0607730-17ae-4116-a472-0bcbd35ae483.json and https://artists.proofprofile.net/proofs/artist/d0607730-17ae-4116-a472-0bcbd35ae483.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T02:46:24Z
  text: {"copyright_id":"0xab7b4b740a1a89ba8ee773d997f32407a7b300c21f553be69f87f5f9e8887642","name":"宮城数江","registered_at":"2026-06-21T00:37:07Z","symbol":"NIM1764179","token_address":"0x3e4ed55a42d28b05c9a6e8d4ec8a2eea3c0c77f1","type":"artist","uuid":"d0607730-17ae-4116-a472-0bcbd35ae483"}