Multi-line footer for single page

Question

I need to add a copyright notice to my paper, and do not want it to break the layout, so I want to place it into the footer/header area of the initial page. Text may be multi-line. It should be displayed on the first page only.

Answer 1

The following works for me.

\usepackage{fancyhdr}
\fancypagestyle{plain}{
\fancyfoot[C]{Copyright \textcopyright\ This material is declared a work of the 
  U.S.~Government and is not subject to copyright protection in the United States. 
  Approved for public release; distribution is unlimited.}
}
\renewcommand{\headrulewidth}{0pt}

Answer 2

I would use a different approach and use the eso-pic package to place something globally on the first page