久慈川悠人(CV:長谷川芳明)
type: MusicGroup
popularity: 9
followers: 297
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x64a208dc1e106550307a616d5043eba5bf02c1f77be1beb5d7d70bb9da5e1cf6
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/71c266a3-0279-49cd-bb16-f3e5f86ef948.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/71c266a3-0279-49cd-bb16-f3e5f86ef948.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/71c266a3-0279-49cd-bb16-f3e5f86ef948
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x64a208dc1e106550307a616d5043eba5bf02c1f77be1beb5d7d70bb9da5e1cf6","name":"久慈川悠人(CV:長谷川芳明)","registered_at":"2026-06-17T05:19:08Z","symbol":"NIM1293225","token_address":"0x79e0a339f3001e66c5c5626d14b2bffb3d86d12e","type":"artist","uuid":"71c266a3-0279-49cd-bb16-f3e5f86ef948"}
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 0x64a208dc1e106550307a616d5043eba5bf02c1f77be1beb5d7d70bb9da5e1cf6. 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/71c266a3-0279-49cd-bb16-f3e5f86ef948.json and https://artists.proofprofile.net/proofs/artist/71c266a3-0279-49cd-bb16-f3e5f86ef948.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x64a208dc1e106550307a616d5043eba5bf02c1f77be1beb5d7d70bb9da5e1cf6","name":"久慈川悠人(CV:長谷川芳明)","registered_at":"2026-06-17T05:19:08Z","symbol":"NIM1293225","token_address":"0x79e0a339f3001e66c5c5626d14b2bffb3d86d12e","type":"artist","uuid":"71c266a3-0279-49cd-bb16-f3e5f86ef948"}
album: 「VAZZROCK」bi-colorシリーズ⑧「久慈川悠人-sapphire-」 (ドラマトラック追加版)
  type: MusicAlbum
  date published: 2018
album: 「VAZZROCK」bi-colorシリーズ⑧「久慈川悠人-sapphire-」
  type: MusicAlbum
  date published: 2018-10-31
album: 「VAZZROCK」bi-colorシリーズ2ndシーズン④「久慈川悠人-sapphire×ruby-」
  type: MusicAlbum
  date published: 2019-09-27
album: 「VAZZROCK」bi-colorシリーズ3rdシーズン③「久慈川悠人-sapphire×morganite- Enjoy the holidays!」
  type: MusicAlbum
  date published: 2021-05-28
album: ツキプロ合同舞台『斬心』主題歌『斬心-無形ノ八重-』
  type: MusicAlbum
  date published: 2021-12-02