The FAI (Federation Aeronautique Internationale) based in Switzerland keeps track of, and verifies,  many kinds of aviation records for almost anything that flies – airplanes, helicopters, gliders, balloons, etc. You can read more at their website https://www.fai.org/.  

They also issue circumnavigator diplomas to people who have flown around the world in small planes. It’s possible to get 4 separate diplomas for (1) eastbound circumnavigation, 2) westbound circumnavigation, (3) polar circumnavigation, (4) non-stop circumnavigation. For the eastbound and westbound circumnavigations there are specific criteria that must be met to qualify:

• • The total distance of the circumnavigation must be greater than 27,000 km
  • You can list up to 20 control points that define your route but those control points must be sequentially eastward (or westward).
  • You must furnish written documentation that you stopped at each control point showing the pilot name, the aircraft, and date. A receipt for buying fuel or for handling services would be typical documentation.

As of 2020, I’m one of only two pilots who has two FAI diplomas for solo circumnavigations. The other pilot is Matevz Lenarcic of Slovenia. The holders of FAI circumnavigator diplomas are listed here: https://www.fai.org/page/gac-circumnavigator-diploma