Resolves yes if at any point in his career Jake Paul wins a Boxing World Championship fight at any weight division for either the WBA, WBC, WBO, or IBF belt (or their future equivalent should they change). Note: Interim champion would count for this market.
Resolution source, ignoring obvious vandalism: List of current world boxing champions - Wikipedia
If Wikipedia updates the format of the page to include less-important belts that are agreed upon by consensus, this market will resolve as "yes" only if he wins one of the currently listed belts (super belts and the WBA regular) or their successors.
Ideally the belt should be the "super" version or whatever the top level belt is, not the random participation trophy ones. I thought had specified that, sorry. I guess a good source would be if his name appears on the Wikipedia boxing champs page, and it's obviously not vandalism. That page includes WBA "Regular champions" which i'm iffy on but I guess it's better to follow wikipedia so it's less arbitrary.