SZL Holdings · a11oy · Prove It

Offline receipt verification · no account · no upload

Prove it. Here.
In your browser.

This page verifies an a11oy receipt bundle with the same fail-closed checks the reference verifier runs — and it proves its own offline claim by counting its network requests while it works. Flip one byte and watch the check name the exact position of the break.

The demo bundle is unsigned — a persistent signer has not landed yet — so the honest verdict is UNSIGNED-LOCAL, not a green check.

AWAITING RUN

Press “Verify the demo bundle.” Nothing leaves this page.

    The tour walks the full buyer test: run, denial, approval, offline verification, tamper, missing evidence, durability, malformed input, trust anchor, report.

    The one thing you take on trust

    Offline verification removes every server from the loop except one assumption: that this page served you the real SZL verification key. That assumption is checkable — when signing lands, the key is pinned here and published through three independent channels:

    channel 1
    Source repository
    The key ships pinned in the verifier source. Inspect the file you are running.
    channel 2
    Public dataset
    The key is published as a dataset artifact on the SZL Hugging Face org, independent of this page.
    channel 3
    Transparency log
    Key publication is itself logged, so a swapped key is detectable after the fact.
    Current key status — honest state

    Today the demo fixtures are unsigned: key management has not landed, so this page ships no production key and every demo verdict is hash-checked and honestly labeled UNSIGNED-LOCAL. A demo session key you mint in the sandbox is labeled DEMO-KEY-UNTRUSTED, lives only in this tab, and never persists.

    demo session key: none minted

    Article 12 logging conformance profile

    One click turns your last completed verification into a downloadable JSON report: every receipt field mapped to a profile row marked PASS, INCOMPLETE, or UNKNOWN — a field never silently passes. The report carries the bundle's honest verdict, states the six-month retention floor, and says plainly that applicability, classification, and deployer obligations are customer-specific.

    Runs a verification of the demo bundle first if you have not verified anything yet.