Take a look my footer, where I have Copyright Notice:
http://open.books4languages.com/grammarb1es/
If the information of the Notice is long, the footer is too long, some times even longer than the page.
What if the Copyright Notice is a link to a different page, like to the page with the Front Matter Type Copyright Notice assigned in the Front Matter CPT ?
Also that is the good place as in that way we can export with the pdf in the correct place or to start to read the book online and to read that.