Just post your business license. If you have a business then you have a license. Otherwise what you have is an idea.
I actually illegal business because there is an element of the business concept prostitution but many remained. therefore I am confused as to what must show license
The licenses assures investors that there is a legal recourse in case you just decide not to pay. There is absolutely nothing an investor could do right now if you if you walked off with the money. With a business licenses you are legally liable for the investors money and are required to abide by all contracts. If you don't then your assets could be seized and handed over to investors.
I understand that in your case a licenses is not possible. That means you will probably need to provide secured collateral valued higher than the loan. Something an investor could keep if you keep the money.