冬美 旬 (CV.永塚拓馬)
type: MusicGroup
popularity: 15
followers: 140
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf85b7009ebc9567f7a5cd478246b3ffe4e049860a9fcafe9e4a4cd17473d4d55
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953803
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953803
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e1b4b534-26fc-4e3e-9a5e-a8cb49996c14.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e1b4b534-26fc-4e3e-9a5e-a8cb49996c14.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e1b4b534-26fc-4e3e-9a5e-a8cb49996c14
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T15:41:00Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf85b7009ebc9567f7a5cd478246b3ffe4e049860a9fcafe9e4a4cd17473d4d55","name":"冬美 旬 (CV.永塚拓馬)","registered_at":"2026-06-15T04:14:09Z","symbol":"NIM0678690","token_address":"0x1d4c972eba3a1b25c1e708d6210cdbbf429fcd61","type":"artist","uuid":"e1b4b534-26fc-4e3e-9a5e-a8cb49996c14"}
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 0xf85b7009ebc9567f7a5cd478246b3ffe4e049860a9fcafe9e4a4cd17473d4d55. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1b4b534-26fc-4e3e-9a5e-a8cb49996c14.json and https://artists.proofprofile.net/proofs/artist/e1b4b534-26fc-4e3e-9a5e-a8cb49996c14.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T16:39:18Z
  text: {"copyright_id":"0xf85b7009ebc9567f7a5cd478246b3ffe4e049860a9fcafe9e4a4cd17473d4d55","name":"冬美 旬 (CV.永塚拓馬)","registered_at":"2026-06-15T04:14:09Z","symbol":"NIM0678690","token_address":"0x1d4c972eba3a1b25c1e708d6210cdbbf429fcd61","type":"artist","uuid":"e1b4b534-26fc-4e3e-9a5e-a8cb49996c14"}