Deontay Wilder is the minor league champ

WBC is the Major league

Today boxing is divided into Major League & Minor league (wither we like it or Not), the 4 major world titles empowered their position by recognizing each other as equals in February 2007, putting themselves permanently a class above all other Minor world titles.

Major League World titles
IBF - WBA - WBC - WBO

Minor League World titles
ABC - GBC - GBF - GBO - GBU - IBA - IBC - IBI - IBL - IBO - IBU - PSC - TWBA - TBRB - UBC - UBO - WBB - WBF - WBL - WBU

Non World titles
Then you have numerous boxing titles, that focus on regions or are interim, silver an international version of a WB & don't put themselves in the World title criteria