I sincerely doubt he's still alive.

Every artists rehearses many songs/many takes that do not make it onto each album. Releasing more albums/songs does not mean he is still alive. He was a talented, puplar recording artists, so all his takes, all his tapes would have been saved for each session.

The "time/date stamp" on the photo supposedly taken means nothing. Many many people have their cameras set to the wrong date, and have no idea how to change it. And dates being put onto a photo are very easy to fake. The photo of him in a crowd is of poor quality, so even easier to fake.

Why would his family lie about his death? His friends? How would he benefit? Why hide? It's not like he was a criminal on the FBI most-wanted list or Interpoll's either. It is not like he was only marginally popular before his death, so faking death would prompt some kind of record sales ...

How can you prove anyone is alive?