山川恵津子
type: MusicGroup
genre: album rock
genre: city pop
popularity: 25
followers: 292
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xeb419a3c96e0066fa098387f5467e40c833c89a6ee9c0744b1f87f4db25a5a47
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/6b8d44b2-1a9b-49ae-9949-3f8c0a5c3ffc.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6b8d44b2-1a9b-49ae-9949-3f8c0a5c3ffc.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/6b8d44b2-1a9b-49ae-9949-3f8c0a5c3ffc
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xeb419a3c96e0066fa098387f5467e40c833c89a6ee9c0744b1f87f4db25a5a47","name":"山川恵津子","registered_at":"2026-06-12T00:12:30Z","symbol":"NIM0141087","token_address":"0x7ef9ecb5dfe973c3fb172537d9ee984d0542e6a0","type":"artist","uuid":"6b8d44b2-1a9b-49ae-9949-3f8c0a5c3ffc"}
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 0xeb419a3c96e0066fa098387f5467e40c833c89a6ee9c0744b1f87f4db25a5a47. 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/6b8d44b2-1a9b-49ae-9949-3f8c0a5c3ffc.json and https://artists.proofprofile.net/proofs/artist/6b8d44b2-1a9b-49ae-9949-3f8c0a5c3ffc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0xeb419a3c96e0066fa098387f5467e40c833c89a6ee9c0744b1f87f4db25a5a47","name":"山川恵津子","registered_at":"2026-06-12T00:12:30Z","symbol":"NIM0141087","token_address":"0x7ef9ecb5dfe973c3fb172537d9ee984d0542e6a0","type":"artist","uuid":"6b8d44b2-1a9b-49ae-9949-3f8c0a5c3ffc"}
album: なみだは媚薬
  type: MusicAlbum
  date published: 2024-06-29
album: Namida wa Biyaku
  type: MusicAlbum
  date published: 2024-06-29
album: Do Yah!
  type: MusicAlbum
  date published: 2024-07-31
album: Do Yah!
  type: MusicAlbum
  date published: 2024-07-31
album: UTOPIA
  type: MusicAlbum
  date published: 2024-08-28
album: UTOPIA
  type: MusicAlbum
  date published: 2024-08-28