市丸恵子,西川直美,弓田真理子,ピアノ:山内知子
type: MusicGroup
genre: choral
popularity: 8
followers: 38
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x82243bd20eaa9fb8d027a23f8f67402a98e7aa8a164837f97cd76a0afc702a6d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953923
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953923
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1c7607eb-54e3-41e6-aff2-9d7b3e3cd715.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1c7607eb-54e3-41e6-aff2-9d7b3e3cd715.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1c7607eb-54e3-41e6-aff2-9d7b3e3cd715
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T09:51:37Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x82243bd20eaa9fb8d027a23f8f67402a98e7aa8a164837f97cd76a0afc702a6d","name":"市丸恵子,西川直美,弓田真理子,ピアノ:山内知子","registered_at":"2026-06-15T23:29:01Z","symbol":"NIM0865971","token_address":"0x1441ab1ceee3c0fcef865e97ac84fd4dbe71425d","type":"artist","uuid":"1c7607eb-54e3-41e6-aff2-9d7b3e3cd715"}
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 0x82243bd20eaa9fb8d027a23f8f67402a98e7aa8a164837f97cd76a0afc702a6d. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c7607eb-54e3-41e6-aff2-9d7b3e3cd715.json and https://artists.proofprofile.net/proofs/artist/1c7607eb-54e3-41e6-aff2-9d7b3e3cd715.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T13:28:01Z
  text: {"copyright_id":"0x82243bd20eaa9fb8d027a23f8f67402a98e7aa8a164837f97cd76a0afc702a6d","name":"市丸恵子,西川直美,弓田真理子,ピアノ:山内知子","registered_at":"2026-06-15T23:29:01Z","symbol":"NIM0865971","token_address":"0x1441ab1ceee3c0fcef865e97ac84fd4dbe71425d","type":"artist","uuid":"1c7607eb-54e3-41e6-aff2-9d7b3e3cd715"}