Kei Iwasaki
type: MusicGroup
popularity: 5
followers: 242
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8b18fc55633dc94e507d1079adf6b6a01505c111e18b65072b219e5f882b9ca4
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/de8beac3-f4c2-4db1-83e2-4f5405c9cc50.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/de8beac3-f4c2-4db1-83e2-4f5405c9cc50.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/de8beac3-f4c2-4db1-83e2-4f5405c9cc50
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x8b18fc55633dc94e507d1079adf6b6a01505c111e18b65072b219e5f882b9ca4","name":"Kei Iwasaki","registered_at":"2026-06-21T05:40:52Z","symbol":"NIM1836787","token_address":"0xef6fa60f39f7669ab1e964829318f496169ee949","type":"artist","uuid":"de8beac3-f4c2-4db1-83e2-4f5405c9cc50"}
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 0x8b18fc55633dc94e507d1079adf6b6a01505c111e18b65072b219e5f882b9ca4. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de8beac3-f4c2-4db1-83e2-4f5405c9cc50.json and https://artists.proofprofile.net/proofs/artist/de8beac3-f4c2-4db1-83e2-4f5405c9cc50.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0x8b18fc55633dc94e507d1079adf6b6a01505c111e18b65072b219e5f882b9ca4","name":"Kei Iwasaki","registered_at":"2026-06-21T05:40:52Z","symbol":"NIM1836787","token_address":"0xef6fa60f39f7669ab1e964829318f496169ee949","type":"artist","uuid":"de8beac3-f4c2-4db1-83e2-4f5405c9cc50"}
album: Brother & Sister
  type: MusicAlbum
  date published: 2015-04-18