Can someone help me to verify if my balcony can handle the load of a hot tub
Balcony = Supported by hidden joists under its floor.
Deck = Supported by joists or/and piers.

Now if you have a balcony and given your question with lack of some information...

You are capital letters CRAZY for installing a hot tub on a balcony.   For something that heavy you would have to be assured metal joists or deep span (that might not be enough).   I would surely get an engineer OK (which no engineer would with this info) before doing so.   

Even if you get past the fact that something that heavy could trigger a quick collapse on a balcony (decks are more apt to give you lots of clues if they are collapsing), collapsing isn't the only thing you have to worry about.   If this thing is so heavy it bows the support joists you could be looking at 10k+ in damages.   Super costly to repair something like this on a finished unit.