Here's an example of the new CC public domain mark (for the Mona Lisa):

<p xmlns:dct="http://purl.org/dc/terms/"> <a rel="license" href="http://creativecommons.org/publicdomain/mark/1.0/"> <img src="http://i.creativecommons.org/p/mark/1.0/88x31.png" style="border-style: none;" alt="Public Domain Mark" /> </a><br /> This work (<span property="dct:title">Mona Lisa</span>, by <span resource="[_:creator]" rel="dct:creator"><span property="dct:title">Leonardo da Vinci</span></span>), identified by <span resource="[_:publisher]" rel="dct:publisher"><span property="dct:title">Ryan Kaldari</span></span>, is free of known copyright restrictions. </p>

I imagine we can put whatever icon image we want in the mark. The metadata is the important stuff (for search engines). Anyone want to run with this on Commons?

Ryan Kaldari