富沢 美智恵
type: MusicGroup
genre: anime
popularity: 10
followers: 34
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xac740140f64f6163e93cc6a632c998515d6db87b94464eec7e8572a5708d6117
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/da989c14-8b48-4005-ae97-466bf8c6a1cd.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/da989c14-8b48-4005-ae97-466bf8c6a1cd.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/da989c14-8b48-4005-ae97-466bf8c6a1cd
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xac740140f64f6163e93cc6a632c998515d6db87b94464eec7e8572a5708d6117","name":"富沢 美智恵","registered_at":"2026-06-21T04:40:26Z","symbol":"NIM1818971","token_address":"0xe54bde7685ff1d803265d81690f5f37befab06e8","type":"artist","uuid":"da989c14-8b48-4005-ae97-466bf8c6a1cd"}
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 0xac740140f64f6163e93cc6a632c998515d6db87b94464eec7e8572a5708d6117. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da989c14-8b48-4005-ae97-466bf8c6a1cd.json and https://artists.proofprofile.net/proofs/artist/da989c14-8b48-4005-ae97-466bf8c6a1cd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0xac740140f64f6163e93cc6a632c998515d6db87b94464eec7e8572a5708d6117","name":"富沢 美智恵","registered_at":"2026-06-21T04:40:26Z","symbol":"NIM1818971","token_address":"0xe54bde7685ff1d803265d81690f5f37befab06e8","type":"artist","uuid":"da989c14-8b48-4005-ae97-466bf8c6a1cd"}