C. Ikehara
type: MusicGroup
genre: japanese classical
genre: traditional music
popularity: 8
followers: 81
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa413fdebdb9d18f7c13c998e4fbb2f4eb9f6bd69a202d2f5b9857aacbf34ec3c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954500
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954500
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9c01b7f9-dd09-4242-a617-5fb3acb17574.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9c01b7f9-dd09-4242-a617-5fb3acb17574.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9c01b7f9-dd09-4242-a617-5fb3acb17574
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T04:47:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa413fdebdb9d18f7c13c998e4fbb2f4eb9f6bd69a202d2f5b9857aacbf34ec3c","name":"C. Ikehara","registered_at":"2026-06-20T03:43:05Z","symbol":"NIM1501920","token_address":"0x1295de4c8f63236411ded5ac9bf8f4092828525b","type":"artist","uuid":"9c01b7f9-dd09-4242-a617-5fb3acb17574"}
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 0xa413fdebdb9d18f7c13c998e4fbb2f4eb9f6bd69a202d2f5b9857aacbf34ec3c. Chain 2 (Bitcoin): anchored in block 954502 (2026-06-20T05:07:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c01b7f9-dd09-4242-a617-5fb3acb17574.json and https://artists.proofprofile.net/proofs/artist/9c01b7f9-dd09-4242-a617-5fb3acb17574.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T05:07:36Z
  text: {"copyright_id":"0xa413fdebdb9d18f7c13c998e4fbb2f4eb9f6bd69a202d2f5b9857aacbf34ec3c","name":"C. Ikehara","registered_at":"2026-06-20T03:43:05Z","symbol":"NIM1501920","token_address":"0x1295de4c8f63236411ded5ac9bf8f4092828525b","type":"artist","uuid":"9c01b7f9-dd09-4242-a617-5fb3acb17574"}