山下健二郎
type: MusicGroup
popularity: 7
followers: 442
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf9805d4bca8f8956f73d7f1cb1fd63231f390e62e11025d22d9bd05147db4f60
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/59f5c75b-694a-4768-bf06-e18197d9cb2a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/59f5c75b-694a-4768-bf06-e18197d9cb2a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/59f5c75b-694a-4768-bf06-e18197d9cb2a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf9805d4bca8f8956f73d7f1cb1fd63231f390e62e11025d22d9bd05147db4f60","name":"山下健二郎","registered_at":"2026-06-16T20:55:43Z","symbol":"NIM1173103","token_address":"0x018a0d2e09faad586f12272bc648833ea17fc823","type":"artist","uuid":"59f5c75b-694a-4768-bf06-e18197d9cb2a"}
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 0xf9805d4bca8f8956f73d7f1cb1fd63231f390e62e11025d22d9bd05147db4f60. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59f5c75b-694a-4768-bf06-e18197d9cb2a.json and https://artists.proofprofile.net/proofs/artist/59f5c75b-694a-4768-bf06-e18197d9cb2a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xf9805d4bca8f8956f73d7f1cb1fd63231f390e62e11025d22d9bd05147db4f60","name":"山下健二郎","registered_at":"2026-06-16T20:55:43Z","symbol":"NIM1173103","token_address":"0x018a0d2e09faad586f12272bc648833ea17fc823","type":"artist","uuid":"59f5c75b-694a-4768-bf06-e18197d9cb2a"}
album: SPOTLIGHT feat. PKCZ(R)
  type: MusicAlbum
  date published: 2025-02-04