四国めたん
type: MusicGroup
popularity: 5
followers: 38
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe8153d560c7385723d9cdaaa1b3c4cc96017816eebd4fc718c5d58859c1a638b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953928
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953928
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1e4ddd19-7d67-4f37-b2f6-3b7c665b08bc.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1e4ddd19-7d67-4f37-b2f6-3b7c665b08bc.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1e4ddd19-7d67-4f37-b2f6-3b7c665b08bc
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T10:21:55Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe8153d560c7385723d9cdaaa1b3c4cc96017816eebd4fc718c5d58859c1a638b","name":"四国めたん","registered_at":"2026-06-16T00:06:55Z","symbol":"NIM0875017","token_address":"0x41bca19421fa73fef229c6d3db24ccd69bf97142","type":"artist","uuid":"1e4ddd19-7d67-4f37-b2f6-3b7c665b08bc"}
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 0xe8153d560c7385723d9cdaaa1b3c4cc96017816eebd4fc718c5d58859c1a638b. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e4ddd19-7d67-4f37-b2f6-3b7c665b08bc.json and https://artists.proofprofile.net/proofs/artist/1e4ddd19-7d67-4f37-b2f6-3b7c665b08bc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:07:57Z
  text: {"copyright_id":"0xe8153d560c7385723d9cdaaa1b3c4cc96017816eebd4fc718c5d58859c1a638b","name":"四国めたん","registered_at":"2026-06-16T00:06:55Z","symbol":"NIM0875017","token_address":"0x41bca19421fa73fef229c6d3db24ccd69bf97142","type":"artist","uuid":"1e4ddd19-7d67-4f37-b2f6-3b7c665b08bc"}
album: フェイク
  type: MusicAlbum
  date published: 2024-02-15
album: maybe,you...
  type: MusicAlbum
  date published: 2024-02-28
album: －7℃君の距離
  type: MusicAlbum
  date published: 2024-02-28