It is your decision whether or not to copyright your work. If you choose to copyright your dissertation/thesis, the copyright fee is currently $55 and is paid to ProQuest at our e-dissertation site (). Be sure to include a Copyright Page with page number "ii" in your dissertation/thesis as shown in .
1. Your dissertation (and any other creative work) is already automatically copyright in your name as soon as it assumes "fixed form," i.e., as soon as it is written. It's publication (or deposit) in ProQuest's dissertations database or in the UNL DigitalCommons provides an independently verified date of record. So— No, you do not need to copyright your dissertation; that happens already automatically.
Gained a merit for my copyright dissertation