宇都美清
type: MusicGroup
genre: enka
genre: kayokyoku
popularity: 3
followers: 74
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1c05aaeda4cad64a6b9e28cdd3043fa542dcd2fda59548407866e2ef55dcba55
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954533
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954533
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a5740ea1-89fb-45b5-a4de-919b53396ef1.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a5740ea1-89fb-45b5-a4de-919b53396ef1.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a5740ea1-89fb-45b5-a4de-919b53396ef1
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T08:57:02Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1c05aaeda4cad64a6b9e28cdd3043fa542dcd2fda59548407866e2ef55dcba55","name":"宇都美清","registered_at":"2026-06-20T07:41:16Z","symbol":"NIM1556379","token_address":"0x2130e437dd1235bc505da6a9439283026b968f95","type":"artist","uuid":"a5740ea1-89fb-45b5-a4de-919b53396ef1"}
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 0x1c05aaeda4cad64a6b9e28cdd3043fa542dcd2fda59548407866e2ef55dcba55. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5740ea1-89fb-45b5-a4de-919b53396ef1.json and https://artists.proofprofile.net/proofs/artist/a5740ea1-89fb-45b5-a4de-919b53396ef1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T08:57:02Z
  text: {"copyright_id":"0x1c05aaeda4cad64a6b9e28cdd3043fa542dcd2fda59548407866e2ef55dcba55","name":"宇都美清","registered_at":"2026-06-20T07:41:16Z","symbol":"NIM1556379","token_address":"0x2130e437dd1235bc505da6a9439283026b968f95","type":"artist","uuid":"a5740ea1-89fb-45b5-a4de-919b53396ef1"}
album: 日本の流行歌スターたち(19) 宇都美 清 ハワイ航空便～あゝモンテンルパの夜は更けて
  type: MusicAlbum
  date published: 2019-04-24