2key
type: MusicGroup
genre: j-rap
popularity: 2
followers: 275
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9d77f4a7bc1420e22f4b88c59e16e59ba975f7d2149d064db1dcb1b226ed72ec
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953869
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953869
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0635204f-f4df-47ed-8773-c0aa9756f403.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0635204f-f4df-47ed-8773-c0aa9756f403.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/0635204f-f4df-47ed-8773-c0aa9756f403
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T01:20:04Z
additional property: OTSCanonicalRecord
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 0x9d77f4a7bc1420e22f4b88c59e16e59ba975f7d2149d064db1dcb1b226ed72ec. Chain 2 (Bitcoin): anchored in block 953869 (2026-06-16T01:20:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0635204f-f4df-47ed-8773-c0aa9756f403.json and https://artists.proofprofile.net/proofs/artist/0635204f-f4df-47ed-8773-c0aa9756f403.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T01:20:04Z
album: REGAIN
  type: MusicAlbum
  date published: 2020-03-15
album: REGAIN
  type: MusicAlbum
  date published: 2020-03-15
album: SISOU
  type: MusicAlbum
  date published: 2020-12-24
album: SISOU
  type: MusicAlbum
  date published: 2020-12-24
album: 散らへん桜
  type: MusicAlbum
  date published: 2022-10-21
album: 色彩
  type: MusicAlbum
  date published: 2022-10-26
album: What You Thought
  type: MusicAlbum
  date published: 2023-10-13
album: Highly Sensitive Down Town
  type: MusicAlbum
  date published: 2024-09-30
album: Highly Sensitive Down Town
  type: MusicAlbum
  date published: 2024-09-30
album: Klaxon
  type: MusicAlbum
  date published: 2024-12-16
album: Back to Back
  type: MusicAlbum
  date published: 2025-02-28
album: Back to Back
  type: MusicAlbum
  date published: 2025-02-28
album: I wonder
  type: MusicAlbum
  date published: 2025-04-12
album: I wonder
  type: MusicAlbum
  date published: 2025-04-12
album: stack (feat. arionbow)
  type: MusicAlbum
  date published: 2025-05-04
album: stack (feat. arionbow)
  type: MusicAlbum
  date published: 2025-05-04
album: Egalitarianism
  type: MusicAlbum
  date published: 2025-10-24
album: Egalitarianism
  type: MusicAlbum
  date published: 2025-10-24