A.C. Kupper
type: MusicGroup
popularity: 17
followers: 44
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf85a86269dbec5604b045c680a157f769b367509c439dbe9ff3d86d9ebd93efb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953842
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953842
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f822fe03-e425-4f49-8a20-89eeaaacba8d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f822fe03-e425-4f49-8a20-89eeaaacba8d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f822fe03-e425-4f49-8a20-89eeaaacba8d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T22:22:30Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf85a86269dbec5604b045c680a157f769b367509c439dbe9ff3d86d9ebd93efb","name":"A.C. Kupper","registered_at":"2026-06-15T06:37:11Z","symbol":"NIM0712835","token_address":"0xa3a2f09baf5c47418f2b29d3ee7072584836c709","type":"artist","uuid":"f822fe03-e425-4f49-8a20-89eeaaacba8d"}
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 0xf85a86269dbec5604b045c680a157f769b367509c439dbe9ff3d86d9ebd93efb. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f822fe03-e425-4f49-8a20-89eeaaacba8d.json and https://artists.proofprofile.net/proofs/artist/f822fe03-e425-4f49-8a20-89eeaaacba8d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T22:22:30Z
  text: {"copyright_id":"0xf85a86269dbec5604b045c680a157f769b367509c439dbe9ff3d86d9ebd93efb","name":"A.C. Kupper","registered_at":"2026-06-15T06:37:11Z","symbol":"NIM0712835","token_address":"0xa3a2f09baf5c47418f2b29d3ee7072584836c709","type":"artist","uuid":"f822fe03-e425-4f49-8a20-89eeaaacba8d"}