Reality check: I don't know that this is all that important, in the end.
So long as you can use an IGP locally with a default route to reach a
copy of the database, whether it be based on DNS, an RPKI, or anything
else, then you can bootstrap your EGP routing. If everything goes down
at the same time, then you would just start rebuilding from the places
where the root servers live, no matter what system's root servers we're
talking about.
or you wait for the Elders of the Internet to visit with blessings
brandon