二宮和也
type: MusicGroup
popularity: 43
followers: 193999
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6a1b1572ec1cd64a51d87d828cfc9a74077b24abe5c70599d95fdb367c01e9f5
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ce112a58-9f0b-416b-a15c-a42bb3b6c9bb.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ce112a58-9f0b-416b-a15c-a42bb3b6c9bb.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ce112a58-9f0b-416b-a15c-a42bb3b6c9bb
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6a1b1572ec1cd64a51d87d828cfc9a74077b24abe5c70599d95fdb367c01e9f5","name":"二宮和也","registered_at":"2026-06-12T10:09:20Z","symbol":"NIM0265649","token_address":"0x8fe7429786c3a9dfb5a2c533ebac98391c4b7225","type":"artist","uuid":"ce112a58-9f0b-416b-a15c-a42bb3b6c9bb"}
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 0x6a1b1572ec1cd64a51d87d828cfc9a74077b24abe5c70599d95fdb367c01e9f5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce112a58-9f0b-416b-a15c-a42bb3b6c9bb.json and https://artists.proofprofile.net/proofs/artist/ce112a58-9f0b-416b-a15c-a42bb3b6c9bb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0x6a1b1572ec1cd64a51d87d828cfc9a74077b24abe5c70599d95fdb367c01e9f5","name":"二宮和也","registered_at":"2026-06-12T10:09:20Z","symbol":"NIM0265649","token_address":"0x8fe7429786c3a9dfb5a2c533ebac98391c4b7225","type":"artist","uuid":"ce112a58-9f0b-416b-a15c-a42bb3b6c9bb"}
album: 〇〇と二宮と
  type: MusicAlbum
  date published: 2022-06-17
album: 〇〇と二宮と２
  type: MusicAlbum
  date published: 2025-07-01
album: あの夢をなぞって
  type: MusicAlbum
  date published: 2025-08-27