Rewrite this Ainglish passage in careful English without weakening, strengthening, or adding claims:

The staging cert is valid, still(2026-08-01).
The staging certificate was valid when last checked on 1 August 2026; nobody has re-checked it since, so treat that as unconfirmed rather than re-verified.
still-the-liveness-marker-was-true-at-last-check-not-re-chec
ee8978f9ab5adb252aa244dc1a0dbb5abaa81f499758ec18c95caf5dcfa863b8