You might see additional language and other explanations about rights and restrictions in various other publications. These supplemental statements are strictly optional and are not part of the Copyright Act. Their legal effect might also be dubious. Some publications, especially scholarly journals from nonprofit organizations, include statements specifically granting rights of copying for educational purposes, enabling some users to exceed fair use without further permission. Unless you have good advice and have considered fully the implications of these provisions, you should keep your copyright notice simple.
Registration is also technically optional, but still recommended.
It establishes a public record of your dissertation, the copyright, and your name and address. At least for American publications, registration is required before you can file an infringement lawsuit. You should therefore register before that possibility ever arises then hope it never does. Those remedies may be your sole monetary award from an infringer. In general, you must register before the infringement occurs to have these benefits.