Testify By Dave Park - July 1, 2008 Share on Facebook Tweet on Twitter Here’s the fifth track off the untitled Nas album to get leaked today. July 1, 2008, the day that 30% of the Nas album hit the internet. So far, so good. "Testify" was produced by Mark Batson. Nas "Testify" (MP3 Download) Spotted over at Nah Right.