Sure I have. I've shown it sufficiently to enlighten anyone willing to be objective, but as Upton Sinclair noted:
"It is difficult to get a man to understand something, when his salary depends on his not understanding it."
Same applies to deeply held beliefs that were taught through propaganda for a century and a half.
You have proven no such thing. You haven’t even addressed the fact that I have SHOWN that foreign ships DID carry cotton and other crops from Southern ports before, and right up to, secession, yet you ignore that evidence.