Adding IEEE copyright notice on bottom margin

To put notice on the margin (not in first column as many does) following latex code can be used:

before \begin{document}

 \usepackage{fancyhdr}
 \fancypagestyle{firststyle}
 {
 \fancyhf{} % sets both header and footer to nothing
 \fancyfoot[LO]{978-1-xxxx-xxxx-4/21/\$31.00~\copyright2021 IEEE}
 \renewcommand{\headrulewidth}{0pt} % remove horizontal rule
 }

after \maketitle

 \thispagestyle{firststyle}