市川和則
type: MusicGroup
popularity: 2
followers: 35
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe10d40503937880c757310b83cca5e26c89ef5745c99d5f6e2c0253e632b3ffa
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953973
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953973
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2a3ca3bd-b76c-4e1a-b9e5-3076b5ab8ec0.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2a3ca3bd-b76c-4e1a-b9e5-3076b5ab8ec0.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2a3ca3bd-b76c-4e1a-b9e5-3076b5ab8ec0
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T16:37:07Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe10d40503937880c757310b83cca5e26c89ef5745c99d5f6e2c0253e632b3ffa","name":"市川和則","registered_at":"2026-06-16T04:19:59Z","symbol":"NIM0935466","token_address":"0x852124cad711f81dc9eb5441a4f4853f3e89b230","type":"artist","uuid":"2a3ca3bd-b76c-4e1a-b9e5-3076b5ab8ec0"}
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 0xe10d40503937880c757310b83cca5e26c89ef5745c99d5f6e2c0253e632b3ffa. Chain 2 (Bitcoin): anchored in block 953973 (2026-06-16T16:37:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a3ca3bd-b76c-4e1a-b9e5-3076b5ab8ec0.json and https://artists.proofprofile.net/proofs/artist/2a3ca3bd-b76c-4e1a-b9e5-3076b5ab8ec0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T16:37:07Z
  text: {"copyright_id":"0xe10d40503937880c757310b83cca5e26c89ef5745c99d5f6e2c0253e632b3ffa","name":"市川和則","registered_at":"2026-06-16T04:19:59Z","symbol":"NIM0935466","token_address":"0x852124cad711f81dc9eb5441a4f4853f3e89b230","type":"artist","uuid":"2a3ca3bd-b76c-4e1a-b9e5-3076b5ab8ec0"}
album: GREEN
  type: MusicAlbum
  date published: 2012-06-26