かよこ
type: MusicGroup
genre: japanese indie
popularity: 2
followers: 331
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x625755de359df3040f928481e6cad5773bdc0d4ad4aeafe1bdf4dd8ab8e4e62e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953997
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953997
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2c360a38-a7e1-400f-a4b0-687072ac946f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2c360a38-a7e1-400f-a4b0-687072ac946f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2c360a38-a7e1-400f-a4b0-687072ac946f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T20:07:57Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x625755de359df3040f928481e6cad5773bdc0d4ad4aeafe1bdf4dd8ab8e4e62e","name":"かよこ","registered_at":"2026-06-16T04:55:48Z","symbol":"NIM0944011","token_address":"0x0ee33f4b909276aed30a24efdae3fa63dd79692a","type":"artist","uuid":"2c360a38-a7e1-400f-a4b0-687072ac946f"}
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 0x625755de359df3040f928481e6cad5773bdc0d4ad4aeafe1bdf4dd8ab8e4e62e. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c360a38-a7e1-400f-a4b0-687072ac946f.json and https://artists.proofprofile.net/proofs/artist/2c360a38-a7e1-400f-a4b0-687072ac946f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:07:57Z
  text: {"copyright_id":"0x625755de359df3040f928481e6cad5773bdc0d4ad4aeafe1bdf4dd8ab8e4e62e","name":"かよこ","registered_at":"2026-06-16T04:55:48Z","symbol":"NIM0944011","token_address":"0x0ee33f4b909276aed30a24efdae3fa63dd79692a","type":"artist","uuid":"2c360a38-a7e1-400f-a4b0-687072ac946f"}
album: たまゆら
  type: MusicAlbum
  date published: 2021-08-11
album: ハロ
  type: MusicAlbum
  date published: 2021-12-15
album: らぶタッチミー
  type: MusicAlbum
  date published: 2025-05-14