Recently Isro's mars orbitor has completed 4 years in mars orbit I guess. I am proud of that as I am Indian. but as curious person I still wonder for proofs of that mars orbitor is still in mars orbit . Isro still havenot possesed capabilities like nasa to produce good images , so its hard a bit for common people like me to believe in that. I am not questioning credibilities of ISRO. Before few years same questiones were raised for NASA moon mission. So big questions is that is there any oraganization which take care of whether achievement of missions are authenticate or not ?
Some spaceflight records are authenticated by the FAI (Fédération Aéronautique Internationale) under its sub-body FAI Astronautic Records Commission but these are generally highest/longest/fastest type records involving human spaceflight. A famous controversy arose over Yuri Gagarin's flight because of FAI rules stating that the pilot had to land in his vehicle to be eligible for a record.
But the general facts of space accomplishments are typically announced by the agency that performs them, and it is up to everyone who doubts them to use their critical thinking and research skills to confirm or deny them for their own purposes.