Independent verifier / exact rational arithmetic
Check the claim yourself.
Inspect a portable odd- or even-sample certificate without trusting the page that created it. This checker derives all median transitions and factor roots anew, compares squared errors, and checks the claimed tie and strict-reversal witness.
01 / Bring a certificate
Read the exact record
Use a JSON file exported by the Sample Reversal Research Lab or generated by the Python CLI. The original bytes are fingerprinted after successful verification.
Or paste certificate JSON
Ready to inspect a certificate.
The file is read locally in this browser. The checker does not upload its contents or place inputs in a URL. A SHA-256 fingerprint identifies the exact checked bytes; it does not authenticate the author or the measurements.
02 / Checked result
Verified under the supplied inputs
Every route checked
Verification proves the recorded partition and outcome under the stated exact inputs. It does not prove those inputs are real observations, establish a superior estimator in general, or authenticate an inventor. Read the argument and limitations.