古川 慎
type: MusicGroup
popularity: 4
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf9fd73b099de30a5b9a31f3b6b056391fbc8e6870fe22080aa31f7f1b44d7eb3
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953936
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953936
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/204798ce-6d4b-478c-9782-1bbf7d1d308d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/204798ce-6d4b-478c-9782-1bbf7d1d308d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/204798ce-6d4b-478c-9782-1bbf7d1d308d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T11:24:55Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf9fd73b099de30a5b9a31f3b6b056391fbc8e6870fe22080aa31f7f1b44d7eb3","name":"古川 慎","registered_at":"2026-06-16T00:49:46Z","symbol":"NIM0885246","token_address":"0x977f2f2891c41dfe35a87794d4e28729817f84e5","type":"artist","uuid":"204798ce-6d4b-478c-9782-1bbf7d1d308d"}
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 0xf9fd73b099de30a5b9a31f3b6b056391fbc8e6870fe22080aa31f7f1b44d7eb3. Chain 2 (Bitcoin): anchored in block 953938 (2026-06-16T11:35:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/204798ce-6d4b-478c-9782-1bbf7d1d308d.json and https://artists.proofprofile.net/proofs/artist/204798ce-6d4b-478c-9782-1bbf7d1d308d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T11:35:56Z
  text: {"copyright_id":"0xf9fd73b099de30a5b9a31f3b6b056391fbc8e6870fe22080aa31f7f1b44d7eb3","name":"古川 慎","registered_at":"2026-06-16T00:49:46Z","symbol":"NIM0885246","token_address":"0x977f2f2891c41dfe35a87794d4e28729817f84e5","type":"artist","uuid":"204798ce-6d4b-478c-9782-1bbf7d1d308d"}