wow, a confused bunch of people here
you are a professional Blackpool champion if you win a professional Standard or Latin in Blackpool. You are an amateur Blackppol champion, if you win the amateur event. If you win a Rising star event, you are a Rising Star Blackpool champion.
If you win at UK Open, you are a UK Open champion.
Blackpool champion title is a very important title, probably the most prestigious title in the world. But i is not a World champion title. to become a world champion, one has to win the World championship.
The competition hosting an Amateur World Championship is appointed every year by the IDSF (one for standard, another for latin, and for 10dance + different age categories).
The professional World championship is the event chosen and designated as such by the WDC (hope i got that right).
to complicate things further, in last few years few more amateur and one more professional leagues have sprung up, and they host their own world championship events.
finally, regarding the rankings.
the IDSF has an official ranking for dancesport athletes. Points are granted according to placements at recognized IDSF competitions. there is a catch: even if you are super good, if you don't compete much, you will not earn as much points as someone of the same level who competes a lot more.
there is no such ranking for pros by the professional organization as far as i know.
the dancesportinfo ranking is created using a different formula. it takes into account all comp results recorded in dancesportinfo database, regardless of them being recognized by either organization. The dancesportinfo ranking is unofficial.