遠き日のセツナ (CV: 瀬戸麻沙美)
type: MusicGroup
popularity: 9
followers: 5
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3b074e646e40f37c0fe2e6fcbef21c47e9d458a55381709dd2f6b3c9cbe43361
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954784
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954784
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b9bca1c6-2b36-46d5-9a24-dc6b74b42f96.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b9bca1c6-2b36-46d5-9a24-dc6b74b42f96.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b9bca1c6-2b36-46d5-9a24-dc6b74b42f96
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-22T02:53:59Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3b074e646e40f37c0fe2e6fcbef21c47e9d458a55381709dd2f6b3c9cbe43361","name":"遠き日のセツナ (CV: 瀬戸麻沙美)","registered_at":"2026-06-21T18:54:14Z","symbol":"NIM1654238","token_address":"0x7d306f9df2edc7ad68d6a6d86c718639760d5b32","type":"artist","uuid":"b9bca1c6-2b36-46d5-9a24-dc6b74b42f96"}
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 0x3b074e646e40f37c0fe2e6fcbef21c47e9d458a55381709dd2f6b3c9cbe43361. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9bca1c6-2b36-46d5-9a24-dc6b74b42f96.json and https://artists.proofprofile.net/proofs/artist/b9bca1c6-2b36-46d5-9a24-dc6b74b42f96.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-22T02:53:59Z
  text: {"copyright_id":"0x3b074e646e40f37c0fe2e6fcbef21c47e9d458a55381709dd2f6b3c9cbe43361","name":"遠き日のセツナ (CV: 瀬戸麻沙美)","registered_at":"2026-06-21T18:54:14Z","symbol":"NIM1654238","token_address":"0x7d306f9df2edc7ad68d6a6d86c718639760d5b32","type":"artist","uuid":"b9bca1c6-2b36-46d5-9a24-dc6b74b42f96"}