I feel his pain. I've submitted beats to cats in the past only for them to use the SAME samples I used, from the SAME parts of the original tracks, in ALMOST the SAME manner, and to really add insult to injury, their tracks titles where NEARLY IDENTICAL to mine! Lol, shxt happens though, live by the sword, die by the sword. If you sample you really can't be made when things like this happen or when people get 'influenced' by your track to make a track for the artist you intended to get your beat on. Its a cold world, getcha paper work up. At the very least, if you cain't copyright your sampled track, copyright any additional instruments and drum patterns you played over and under it so if someone makes a DIRECT steal, you atleast have a leg to stand on