Specific 21st century schizoid man recording

There was this recording of 21st century schizoid man, live in 1969 I think, where lakes voice has no effect on it and instead of singing "twenty-first century schizoid MAAaaan" he would sing it "twenty first century schizoid maaa-AAAN!" It felt like he put more power in his voice too.

Pretty small amount of detail I know but just wanted to know if it was maybe part of a live album and where I could listen to it