What proof is there being world space agencies?
Do the space agencies exist? Is that your question? I suppose one could go around and look to see if they exist. NASA claims to be located in Houston, TX, USA. The European Space Agency is located, according to their website, at:
EAC, the European Astronauts Centre in Cologne, Germany;
ESAC, the European Space Astronomy Centre, in Villanueva de la Canada, Madrid, Spain;
ESOC, the European Space Operations Centre in Darmstadt, Germany;
ESRIN, the ESA centre for Earth Observation, in Frascati, near Rome, Italy;
ESTEC, the European Space Research and Technology Centre, Noordwijk, the Netherlands.
As for the others, I suppose you can look them up for yourself and then check to see if they're real or not. Let us know what you find out.