Nice suggestion. I will try to consult a Curaçao lawyer.
You are welcome but why do you exclusively consult with a Curacao lawyer? If it's impossible to get it patented in Curacao, you might try it in another country. Since Curacao is an autonomous country within the Kingdom of the Netherlands, I'd try to reach lawyers from the Netherlands but take this advice of mine with a grain of salt.
By the way, I have a friend who is a product owner in Betsson and I asked him about your idea but he told me that Betsson is not interested in it. Betsson isn't a crypto casino but I tried my luck anyway.
I don't know if it's truly necessary for you to be paying that much money just so that somebody can see your provably fair system, much less to *use* it. In fact, I think it should be the other way around actually. You sell the system to any casino and you get the 5000 dollars.
How have you came to that $5000 valuation though? I guess that might be a question that potential clients might ask you.
He pays this much money to gain attention and show that his intentions are true and he is not some random time-waster. Btw it's not that he is going to gift them with 2500 or 5000 dollars, he is expecting large offers from big casinos.
Btw I seriously find it funny if any casino owner will really take that money from him.