Jaime Frutos Morales developed an extension for the the Epiphany web browser for the Gnome desktop which detects embedded license metadata. If license information is detected the extension adds a (CC) icon to the status bar. Clicking the icon opens the license deed in the browser.
It has been included in Gnome 2.17 and will be part of the official Gnome 2.18 release. If you want to install it:
$ cd ~/.gnome2/epiphany/extensions $ tar zxvf /path/to/cc-license-viewer.tar.gz