Nah, you did not, it's more like I think he's likely to have it.
Based on what I've seen in manga, it's possible that CoC has something to do with your bloodline - we have both Kaido and Yamato possess CoC, we have Garp and Luffy, we have Harald and Loki.... So yes, it is a stretch, but I wouldn't be surprised for Shamrock to be a hakiman.