Kachi , Kacchi, Kachhi or Katchi may refer to: Places in Iran Kachi, Ardestan, a village in Isfahan Province Gachi, Fars, a village in Fars Province Keychi, Isfahan, a village in Isfahan Province
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544cb87868fb2019163eb348c84c92e3b3e9f79bf546f791be2cc0f8bfbee67d. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9fd1e8d-37bc-4c51-b49a-da19e5d76a2d.json and https://artists.proofprofile.net/proofs/artist/e9fd1e8d-37bc-4c51-b49a-da19e5d76a2d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).