The first OP-1 battle is here:
Kudos to @mixrasta, who participated in Battle 66 too, and many more between!
I see that I’ve participated from Battle 4 onwards.
Some other forum regulars or semi-regulars in these first battles as well.
Here’s the soundcloud account link, which has most of the battles until about two years ago: https://soundcloud.com/ohpeewon-battles. I wonder who’s the account holder, don’t remember any more. @yoof maybe?