I don’t know here is some video reportedly from Alice Cooper’s band’s own set (I know there was a lot of film footage shot by DA Pennebaker). Doesn’t sound like they were in the band at that time...
http://www.youtube.com/watch?v=IDFFzZRIcQI
Alice Cooper (Neal Smith/ Dennis Dunaway/ Glen Buxton/Alice Cooper & Mike Bruce at Toronto R & R Revival Sept.13/69
Yeah, I think you are right. I think the Hunter/Wagner team became the Alice Cooper band after 1973, even though they were supposedly ghosting on the studio albums before that. ‘69 is too early.
Freegards