Inspect it.
Change it.
Check it.
A real cryptographic check on a synthetic record. Discover what stays valid—and what breaks—when the answer changes.
A record you can question.
The original fixture contains a declared answer, grounding signals and a signature over its canonical record hash. Checks run locally in your browser.
Select Verify sample to recompute the hash and check the public-test-key signature.
- Canonical record hashNOT CHECKED
- Signature over declared hashNOT CHECKED
- Signer identity trustTEST KEY ONLY
- Answer truth / actual executionNOT ESTABLISHED
The sample is fixed to the bundled English fixture. This is not a general-purpose KLM conformance validator. A supported browser with Web Crypto Ed25519 is required for the signature check.
Inside the record
Original synthetic fixture · 15 September 2026Loading the bundled fixture…
Integrity and signature answer different questions.
Altering the answer changes the computed hash. The original signature over the original declared hash can still validate, but the altered record no longer matches that signed value. Record acceptance requires both checks.
Neither check authenticates the truth of the answer, the real-world identity of a test-key holder or actual model execution.
Measured, heuristic and missing are not interchangeable.
The fixture labels source authority as heuristic, retrieval relevance as measured and source freshness as missing. These are demonstration values.