Add easily your own copyright at the footer of your RSS feed posts. It improves the SEO and avoids content scrapers to steal your posts.
The ultimate plugin and service to stop and kill splogs in WordPress Multisite and BuddyPress, from WPMU DEV.
Automatically generates a copyright notice based on the first and last post published in the WordPress database.
Adds copyright notice at end of articles in full text RSS feeds, with back links to the blog and original article.