[user104658]

Originally Posted by James

I guess the watermarking would be sound added that was at frequencies the human ear can't hear.

Inevitably, it will be cracked - or a version will come out from someone that doesn't have the watermark added.

I don't know, various hacking groups never managed to successfully crack the Cinavia protection on the PS3 (anti-piracy using audio markers, similar but not identical to this sort of watermarking). I always used my PS3 for my downloads until Cinavia ruined it .