平松混声合唱団
type: MusicGroup
genre: choral
popularity: 11
followers: 18
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4dc15b9259b244934d3dc3e57821533690060b49b6c4e3828d1a5e14ac6c05de
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953817
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953817
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fb041c94-2805-4cdf-b0fa-e81403b53469.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fb041c94-2805-4cdf-b0fa-e81403b53469.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/fb041c94-2805-4cdf-b0fa-e81403b53469
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T18:10:31Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4dc15b9259b244934d3dc3e57821533690060b49b6c4e3828d1a5e14ac6c05de","name":"平松混声合唱団","registered_at":"2026-06-15T06:51:33Z","symbol":"NIM0716264","token_address":"0xc7538f19324c8eb0a5bcccdd83213641ce944674","type":"artist","uuid":"fb041c94-2805-4cdf-b0fa-e81403b53469"}
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 0x4dc15b9259b244934d3dc3e57821533690060b49b6c4e3828d1a5e14ac6c05de. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb041c94-2805-4cdf-b0fa-e81403b53469.json and https://artists.proofprofile.net/proofs/artist/fb041c94-2805-4cdf-b0fa-e81403b53469.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T19:59:56Z
  text: {"copyright_id":"0x4dc15b9259b244934d3dc3e57821533690060b49b6c4e3828d1a5e14ac6c05de","name":"平松混声合唱団","registered_at":"2026-06-15T06:51:33Z","symbol":"NIM0716264","token_address":"0xc7538f19324c8eb0a5bcccdd83213641ce944674","type":"artist","uuid":"fb041c94-2805-4cdf-b0fa-e81403b53469"}
album: 君とみた海 〜若松 歓コーラスセレクション［混声版］
  type: MusicAlbum
  date published: 2010-07-21