JJ Kamei
type: MusicGroup
popularity: 3
followers: 424
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x48a2ac5823ddbdba8044fc5ad150210c653fab04410d8fbd4ea630de8b9ef5cb
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/a41d4c18-59e8-402a-a2b2-d053488b43d4.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a41d4c18-59e8-402a-a2b2-d053488b43d4.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a41d4c18-59e8-402a-a2b2-d053488b43d4
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T08:57:02Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x48a2ac5823ddbdba8044fc5ad150210c653fab04410d8fbd4ea630de8b9ef5cb","name":"JJ Kamei","registered_at":"2026-06-20T06:50:35Z","symbol":"NIM1545198","token_address":"0xff7629e0b6a3345b46fbcf5601b7f2fc47b4154f","type":"artist","uuid":"a41d4c18-59e8-402a-a2b2-d053488b43d4"}
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 0x48a2ac5823ddbdba8044fc5ad150210c653fab04410d8fbd4ea630de8b9ef5cb. 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/a41d4c18-59e8-402a-a2b2-d053488b43d4.json and https://artists.proofprofile.net/proofs/artist/a41d4c18-59e8-402a-a2b2-d053488b43d4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T08:57:02Z
  text: {"copyright_id":"0x48a2ac5823ddbdba8044fc5ad150210c653fab04410d8fbd4ea630de8b9ef5cb","name":"JJ Kamei","registered_at":"2026-06-20T06:50:35Z","symbol":"NIM1545198","token_address":"0xff7629e0b6a3345b46fbcf5601b7f2fc47b4154f","type":"artist","uuid":"a41d4c18-59e8-402a-a2b2-d053488b43d4"}
album: My Angels
  type: MusicAlbum
  date published: 2020-10-04
album: My Angels
  type: MusicAlbum
  date published: 2020-10-04
album: Meadow Song
  type: MusicAlbum
  date published: 2022-02-04
album: Sanctus
  type: MusicAlbum
  date published: 2023-06-11
album: Journal Entries
  type: MusicAlbum
  date published: 2023-12-28
album: Wicked Thoughts
  type: MusicAlbum
  date published: 2025-04-20