Probably, but who cares? "River Man" is one of the five best recordings ever--just don't ask me to name the other four. I've been a Drake fan since the mid-1970s, shortly after his way-premature death, when the late lamented WWYZ in Connecticut used to play his music. He's had a bit of a renaissance in the last few years, after VW used the song "Pink Moon," more than a bit incongruously, in a TV ad. And it doesn't hurt that he looked like a noninsane version of Jim Morrison.
There's a snippet of a music video here for "River Man."
There are a few places to download from pay sites here.
And some background is here.