Let’s don’t bother spending hours to look for footer.php or widgets in WordPress to add your Copyright line on the footer of website. Here’s one easy method to add using CSS.

Add copyright text / info with CSS for WordPress/Bootstrap websites

footer > div:before {
    content: "© Copyright (YEAR). All rights reserved.";
    font-size: 14px;
    color: #777;
    text-align: center;
    display: block;
    margin: 20px auto;
}