When applying to become an online notary in Texas, the state has some requirements.
DocVerify does supply the required x.509 digital certificates or the notary can upload their own if they have one.
The seal is also available in PNG format for download to provide to the state as well as a way of applying the digital certificate to a document for the state to review.
How to become an e-notary:
https://www.docverify.com/Support/CommunityForum/tabid/237/forumid/16/threadid/54/scope/posts/Default