うらら Feat. KAITO
type: MusicGroup
genre: vocaloid
popularity: 2
followers: 57
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc2e9bd19bf1429fe16a49137eb08d3c0552123b9d0b6cf30c4ff77c5ad713880
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953864
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953864
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0506dac0-d7b9-49a4-916e-ee387578dc83.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0506dac0-d7b9-49a4-916e-ee387578dc83.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/0506dac0-d7b9-49a4-916e-ee387578dc83
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T00:30:31Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc2e9bd19bf1429fe16a49137eb08d3c0552123b9d0b6cf30c4ff77c5ad713880","name":"うらら Feat. KAITO","registered_at":"2026-06-15T15:16:50Z","symbol":"NIM0748535","token_address":"0x1e7ff2686f2045a85b7e39b612c2850b8092a74a","type":"artist","uuid":"0506dac0-d7b9-49a4-916e-ee387578dc83"}
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 0xc2e9bd19bf1429fe16a49137eb08d3c0552123b9d0b6cf30c4ff77c5ad713880. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0506dac0-d7b9-49a4-916e-ee387578dc83.json and https://artists.proofprofile.net/proofs/artist/0506dac0-d7b9-49a4-916e-ee387578dc83.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T02:39:16Z
  text: {"copyright_id":"0xc2e9bd19bf1429fe16a49137eb08d3c0552123b9d0b6cf30c4ff77c5ad713880","name":"うらら Feat. KAITO","registered_at":"2026-06-15T15:16:50Z","symbol":"NIM0748535","token_address":"0x1e7ff2686f2045a85b7e39b612c2850b8092a74a","type":"artist","uuid":"0506dac0-d7b9-49a4-916e-ee387578dc83"}
album: ロジカルアーミー
  type: MusicAlbum
  date published: 2019-02-14