Do you use Wordpress?
If so, the Numly Number copyright plugin is for you! You can submit your Wordpress posts to Numly for copyright proofs when you publish your posts automatically! The plugin registers your copyright with Numly and returns the Numly Number (electronic serial number), barcode, and verification links to your blog post automatically.
Numly would like to acknowledge Cal Evans for his initial development of the WP-Numly Number Wordpress Plugin and Scott Grayban for enhancing the plugin to support Wordpress version 3.0+ and future maintenance of the plugin.