Die gedanken sind frei

[Naphtali]

Some time ago I queried the forum to provide a link to the song, Die Gedanken Sind Frei (approximately: My Thoughts Are Free) - a song of defiance sung in the Nazi death camps. The link provided was perfect - and then I migrated from Macintosh OS 9.2 to OS X. I've lost several Mozilla bookmarks during my transition to Firefox among which was Die Gedanken Sind Frei.

I've searched and found several links to its lyrics and its tune, but none where the song is sung. Please direct me to a rendition of the song.