Chris Brown and his hired muscle tried to "beat the living s**t" out of Frank Ocean during their infamous brawl ... this according to Frank's music producer who says he saw the whole thing go down. Michael Uzowuru -- who produces tracks with Frank and Odd Future -- says he was with Ocean the night of the fight. Uzowuru detailed his version of events in a blog posted early Sunday morning. Uzowuru says the whole thing did indeed start over a parking spot. He says that he, Frank and a guy named Chito arrived at Westlake Studios that night to record, when they saw an orange Lambo parked in the spot labeled "Frank." Uzowuru says they told the front desk to move the car and were informed it belonged to Chris Brown. He says Chris Brown came out 10 minutes later with a "big dude" and a "skinnier dude" -- and when Frank told CB, "You parked in my spot, move" ... that's when it all went downhill. (TMZ)