久川颯 (CV: 長江里加)
type: MusicGroup
popularity: 16
followers: 409
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x13effa484d3d5c001dad2143e276cb27f0e012b1c0056384729a6083b7e2fdd7
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953697
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953697
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/681f7f4f-73d9-4075-ba5f-c659c60df0b6.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/681f7f4f-73d9-4075-ba5f-c659c60df0b6.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/681f7f4f-73d9-4075-ba5f-c659c60df0b6
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T21:49:28Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x13effa484d3d5c001dad2143e276cb27f0e012b1c0056384729a6083b7e2fdd7","name":"久川颯 (CV: 長江里加)","registered_at":"2026-06-14T15:26:28Z","symbol":"NIM0495507","token_address":"0x05b77456baef45e21accb6ca7b9b4fd16e3c8cd3","type":"artist","uuid":"681f7f4f-73d9-4075-ba5f-c659c60df0b6"}
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 0x13effa484d3d5c001dad2143e276cb27f0e012b1c0056384729a6083b7e2fdd7. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/681f7f4f-73d9-4075-ba5f-c659c60df0b6.json and https://artists.proofprofile.net/proofs/artist/681f7f4f-73d9-4075-ba5f-c659c60df0b6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T21:49:28Z
  text: {"copyright_id":"0x13effa484d3d5c001dad2143e276cb27f0e012b1c0056384729a6083b7e2fdd7","name":"久川颯 (CV: 長江里加)","registered_at":"2026-06-14T15:26:28Z","symbol":"NIM0495507","token_address":"0x05b77456baef45e21accb6ca7b9b4fd16e3c8cd3","type":"artist","uuid":"681f7f4f-73d9-4075-ba5f-c659c60df0b6"}