横山大輔
type: MusicGroup
popularity: 3
followers: 512
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa9f10cd8616de6a684198c0925e369836053c790bb1ec2930e19fc5622f5802f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953915
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953915
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1a672205-6435-47ff-b78e-e9c4e5fdc8cf.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1a672205-6435-47ff-b78e-e9c4e5fdc8cf.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1a672205-6435-47ff-b78e-e9c4e5fdc8cf
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T08:36:32Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa9f10cd8616de6a684198c0925e369836053c790bb1ec2930e19fc5622f5802f","name":"横山大輔","registered_at":"2026-06-15T22:47:30Z","symbol":"NIM0856050","token_address":"0xbf15061033648c435275ef79cb8fd7a93065f010","type":"artist","uuid":"1a672205-6435-47ff-b78e-e9c4e5fdc8cf"}
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 0xa9f10cd8616de6a684198c0925e369836053c790bb1ec2930e19fc5622f5802f. Chain 2 (Bitcoin): anchored in block 953915 (2026-06-16T08:36:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a672205-6435-47ff-b78e-e9c4e5fdc8cf.json and https://artists.proofprofile.net/proofs/artist/1a672205-6435-47ff-b78e-e9c4e5fdc8cf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T08:36:32Z
  text: {"copyright_id":"0xa9f10cd8616de6a684198c0925e369836053c790bb1ec2930e19fc5622f5802f","name":"横山大輔","registered_at":"2026-06-15T22:47:30Z","symbol":"NIM0856050","token_address":"0xbf15061033648c435275ef79cb8fd7a93065f010","type":"artist","uuid":"1a672205-6435-47ff-b78e-e9c4e5fdc8cf"}
album: 247
  type: MusicAlbum
  date published: 2009-10-01
album: 音
  type: MusicAlbum
  date published: 2011-01-21
album: Noah
  type: MusicAlbum
  date published: 2015-12-25
album: Advent 〜クリスマスへの道〜
  type: MusicAlbum
  date published: 2018-12-01
album: Jesus
  type: MusicAlbum
  date published: 2020-03-11