4円
type: MusicGroup
genre: japanese indie
popularity: 4
followers: 1787
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa8f1a0a2d95c2e9b692827ff82f1b1ba6cd3a060c3145db6bf179206034f1669
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953867
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953867
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/055ae4bb-4791-4371-a10f-8c97cd3a4e95.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/055ae4bb-4791-4371-a10f-8c97cd3a4e95.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/055ae4bb-4791-4371-a10f-8c97cd3a4e95
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T01:09:47Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa8f1a0a2d95c2e9b692827ff82f1b1ba6cd3a060c3145db6bf179206034f1669","name":"4円","registered_at":"2026-06-15T15:24:09Z","symbol":"NIM0750286","token_address":"0xa25d413288e88b9095dbcbc716de844e29dd91a1","type":"artist","uuid":"055ae4bb-4791-4371-a10f-8c97cd3a4e95"}
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 0xa8f1a0a2d95c2e9b692827ff82f1b1ba6cd3a060c3145db6bf179206034f1669. Chain 2 (Bitcoin): anchored in block 953867 (2026-06-16T01:09:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/055ae4bb-4791-4371-a10f-8c97cd3a4e95.json and https://artists.proofprofile.net/proofs/artist/055ae4bb-4791-4371-a10f-8c97cd3a4e95.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T01:09:47Z
  text: {"copyright_id":"0xa8f1a0a2d95c2e9b692827ff82f1b1ba6cd3a060c3145db6bf179206034f1669","name":"4円","registered_at":"2026-06-15T15:24:09Z","symbol":"NIM0750286","token_address":"0xa25d413288e88b9095dbcbc716de844e29dd91a1","type":"artist","uuid":"055ae4bb-4791-4371-a10f-8c97cd3a4e95"}
album: side-c
  type: MusicAlbum
  date published: 2019-09-18
album: yolu
  type: MusicAlbum
  date published: 2023-12-20
album: いまさら
  type: MusicAlbum
  date published: 2024-09-04