東京混声合唱
type: MusicGroup
genre: choral
genre: japanese classical
popularity: 2
followers: 20
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x12c4bc789c47b28bb5ec49f7258f7b53d3374ade1e5836bfa0929874155716b8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954603
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954603
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c2dfa349-1177-4983-b593-ddcf29e50e4a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c2dfa349-1177-4983-b593-ddcf29e50e4a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c2dfa349-1177-4983-b593-ddcf29e50e4a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T21:47:54Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x12c4bc789c47b28bb5ec49f7258f7b53d3374ade1e5836bfa0929874155716b8","name":"東京混声合唱","registered_at":"2026-06-20T20:08:31Z","symbol":"NIM1701959","token_address":"0x393f2acd712252b92f6495d3ec2256a985039ba0","type":"artist","uuid":"c2dfa349-1177-4983-b593-ddcf29e50e4a"}
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 0x12c4bc789c47b28bb5ec49f7258f7b53d3374ade1e5836bfa0929874155716b8. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2dfa349-1177-4983-b593-ddcf29e50e4a.json and https://artists.proofprofile.net/proofs/artist/c2dfa349-1177-4983-b593-ddcf29e50e4a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T21:47:54Z
  text: {"copyright_id":"0x12c4bc789c47b28bb5ec49f7258f7b53d3374ade1e5836bfa0929874155716b8","name":"東京混声合唱","registered_at":"2026-06-20T20:08:31Z","symbol":"NIM1701959","token_address":"0x393f2acd712252b92f6495d3ec2256a985039ba0","type":"artist","uuid":"c2dfa349-1177-4983-b593-ddcf29e50e4a"}