Our definitions are:
Y2038 compliance means that a given system will not have Y2038 issues to at least a specified date beyond 2038.
Y2038 certification means that an organization has certified that a given system will not have Y2038 issues and is certified to function without date-related issues to at least a specified date beyond 2038.
At the moment, there are no (known) official or even unofficial industry standards for Y2038 compliance/certification. It would be a positive development for such standard(s) to be created, and we at Y2038.com are interested in participating in the standard(s) development process. Let us know if you are also interested. Perhaps we can get the ball rolling through a grass-roots effort.