秋田真典
type: MusicGroup
popularity: 3
followers: 111
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xac1aae6921edfc1ff0c5a0899735089ae3a967e14d9c7c2affde2af675c1794a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953933
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953933
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1fcb20b1-bde6-4a25-a4af-910a6497d306.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1fcb20b1-bde6-4a25-a4af-910a6497d306.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1fcb20b1-bde6-4a25-a4af-910a6497d306
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T11:13:24Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xac1aae6921edfc1ff0c5a0899735089ae3a967e14d9c7c2affde2af675c1794a","name":"秋田真典","registered_at":"2026-06-16T00:37:38Z","symbol":"NIM0882352","token_address":"0x1eb213cfdc361bfd9bd1f30d90ddc4ac8843f943","type":"artist","uuid":"1fcb20b1-bde6-4a25-a4af-910a6497d306"}
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 0xac1aae6921edfc1ff0c5a0899735089ae3a967e14d9c7c2affde2af675c1794a. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1fcb20b1-bde6-4a25-a4af-910a6497d306.json and https://artists.proofprofile.net/proofs/artist/1fcb20b1-bde6-4a25-a4af-910a6497d306.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T13:28:01Z
  text: {"copyright_id":"0xac1aae6921edfc1ff0c5a0899735089ae3a967e14d9c7c2affde2af675c1794a","name":"秋田真典","registered_at":"2026-06-16T00:37:38Z","symbol":"NIM0882352","token_address":"0x1eb213cfdc361bfd9bd1f30d90ddc4ac8843f943","type":"artist","uuid":"1fcb20b1-bde6-4a25-a4af-910a6497d306"}