You don't need to,even if you get a malicious thumbprint,the associated cert still needs to be signed by a trusted CA. CA list for TLDs will be distributed with

You don't need to,even if you get a malicious thumbprint,the associated cert still needs to be signed by a trusted CA. CA list for TLDs will be distributed with the resolver software just like browsers ship with such a list (or rely on your browser/client preferred list)