ECHOCERT OFFLINE DEMONSTRATION

Synthetic inputs and approval decisions; no live AI call, customer or sale. The existing EchoCert operator performed a real bounded local file write for the approved fixture. The denied fixture created no output. An altered copy failed the EchoCert verifier.

Contains approved, denied and deliberately altered evidence packs plus measured results. No application source code or credentials are included. Model names in nested mock responses are fixture labels, not proof of a live model call.

Each ZIP can be inspected with standard unzip tools. In the approved pack, approved_target_snapshot.txt is the retained output; the denied pack has no approved snapshot. In the altered pack, that snapshot has one extra byte while the recorded receipt remains unchanged. EchoCert verification was run on the retained job directories; the supplied packs preserve their corresponding records.

SHA256SUMS.txt helps check these download bytes with PowerShell Get-FileHash or sha256sum. It is not a digital signature or external timestamp. Keep a separately trusted fingerprint if you need to detect replacement of the entire download.

This demonstration does not establish live API acceptance, a completed paid pilot, full capture, legal admissibility, truth or authorship.
