よこざわけい子
type: MusicGroup
popularity: 3
followers: 31
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdde9e521a32bf45b15d63b646b9770d67baa7388d5dce69c66745a66147575d2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954615
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954615
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c689350f-5b95-4cec-850c-c71658824d00.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c689350f-5b95-4cec-850c-c71658824d00.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c689350f-5b95-4cec-850c-c71658824d00
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T22:44:50Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xdde9e521a32bf45b15d63b646b9770d67baa7388d5dce69c66745a66147575d2","name":"よこざわけい子","registered_at":"2026-06-20T21:28:36Z","symbol":"NIM1719845","token_address":"0x17947a39fc41ea165837a73584fcf2f50211c6d6","type":"artist","uuid":"c689350f-5b95-4cec-850c-c71658824d00"}
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 0xdde9e521a32bf45b15d63b646b9770d67baa7388d5dce69c66745a66147575d2. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c689350f-5b95-4cec-850c-c71658824d00.json and https://artists.proofprofile.net/proofs/artist/c689350f-5b95-4cec-850c-c71658824d00.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T22:44:50Z
  text: {"copyright_id":"0xdde9e521a32bf45b15d63b646b9770d67baa7388d5dce69c66745a66147575d2","name":"よこざわけい子","registered_at":"2026-06-20T21:28:36Z","symbol":"NIM1719845","token_address":"0x17947a39fc41ea165837a73584fcf2f50211c6d6","type":"artist","uuid":"c689350f-5b95-4cec-850c-c71658824d00"}