吉沢町子
type: MusicGroup
genre: enka
genre: kayokyoku
popularity: 2
followers: 94
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x51477d923f58df0454ab092b059a36a526360144e167f0a43ec9fd2b6ab6e30e
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/b57bcd3a-86b5-45ec-900a-e0e5eab58998.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b57bcd3a-86b5-45ec-900a-e0e5eab58998.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b57bcd3a-86b5-45ec-900a-e0e5eab58998
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x51477d923f58df0454ab092b059a36a526360144e167f0a43ec9fd2b6ab6e30e","name":"吉沢町子","registered_at":"2026-06-20T14:41:31Z","symbol":"NIM1633568","token_address":"0xbf5b12f926ebd21de0ed02f4715fb6d6f2a7361e","type":"artist","uuid":"b57bcd3a-86b5-45ec-900a-e0e5eab58998"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51477d923f58df0454ab092b059a36a526360144e167f0a43ec9fd2b6ab6e30e. 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/b57bcd3a-86b5-45ec-900a-e0e5eab58998.json and https://artists.proofprofile.net/proofs/artist/b57bcd3a-86b5-45ec-900a-e0e5eab58998.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0x51477d923f58df0454ab092b059a36a526360144e167f0a43ec9fd2b6ab6e30e","name":"吉沢町子","registered_at":"2026-06-20T14:41:31Z","symbol":"NIM1633568","token_address":"0xbf5b12f926ebd21de0ed02f4715fb6d6f2a7361e","type":"artist","uuid":"b57bcd3a-86b5-45ec-900a-e0e5eab58998"}
album: 『吉沢町子』歌謡・演歌大全集～デラレコード編 カセットテープ・アーカイブス
  type: MusicAlbum
  date published: 2023-05-31
album: 北の宿から ～『吉沢町子』歌謡・演歌大全集
  type: MusicAlbum
  date published: 2025-06-18