This page uses the methods described in A Sentinel for Detecting Trusted Keys in DNSSEC
to determine if the resolvers that you are using will work after the upcoming KSK roll.
You should really read the document, but the 50'000ft view is that it attempts to load resources from 3 names:
It then uses some simple logic to tell what your fate will be after the KSK roll:
For more information about how to prepare for the Root Zone KSK Roll visit: https://www.icann.org/resources/pages/ksk-rollover or read this blog entry by SIDN.nl. ICANN also keep a regularly updated list of IP addresses of resolvers suspected of not having install the new KSK; view this list here.
This work by Warren Kumari is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.