Janoshik COA verifier.

The verifier runs your input against a locally-mirrored copy of Janoshik's public-tests database. Every test in our mirror came from public.janoshik.com. When the lookup finds a match, you get the same fields you would see by clicking through to verify.janoshik.com manually, consolidated into one screen.

What the result tells you

• Match found — the test exists in the public database and the fields you provided agree with the recorded values. The COA is verified at the level of the public-database entry.
• Test ID found, but field mismatch— the test exists, but the purity / compound / date you provided does not match the recorded values. This is the "edited certificate" pattern. Investigate before ordering.
• No match— no test in our mirror corresponds to your input. Either the COA was issued after our mirror's last refresh, the COA references a private (unpublished) test, or the COA is fabricated. Check verify.janoshik.com directly to disambiguate.

What this tool does not do

Three limits worth surfacing before you rely on the result:

• It does not query Janoshik live. Our mirror is rebuilt periodically, not in real time. A recently-published test may not yet be in the mirror — refresh date is shown above. For absolute certainty, click through to verify.janoshik.com using the test URL we link to.
• It does not verify the vial in your hand. Even when the lookup matches cleanly, the COA certifies a specific batch. Confirm the batch ID printed on your vial matches the batch ID in the result. This is step 4 of our four-step verify protocol.
• It does not catch cherry-picked COAs. A vendor that tested one clean batch and uses that COA across multiple shipments will pass the lookup. Independent retesting on a separate batch is the only defense — see our 7,164-tests purity analysis for context.

What our mirror covers

200publicly-submitted tests, audited from JPG report images via OCR + structured extraction. Refresh cadence: weekly. Older tests (test IDs below ~50000) are not in the mirror because their report images are not publicly accessible on Janoshik's servers — those certificates predate the jas.janoshik.com hosting migration and require manual verification at verify.janoshik.com.

• Janoshik verify: how to confirm a COA in four steps — the manual protocol this tool partially automates
• Is Janoshik testing legit? — audit of the lab and its data
• What 7,164 Janoshik tests reveal about peptide vendor purity — the aggregate findings from our local mirror
• Janoshik testing hub — overview page with FAQ, region distribution, top-tested compounds