Betsoft games and RNG have been through a rigorous test and certification process to ensure that the games are fair. They are not "provably fair" but they are definitely fair.
At Cloudbet we carry Betsoft RNG blackjack games, but also a live dealer offering. You can speak with the dealer to ensure the games are delivered in realtime, and the pit boss will display all cards to the players when they are changed so you can be certain that the games are fair.
Cheers,
Cloudbet
But there is no way to verify you are telling the truth and you have the ability to change the odds in your favor for any game. Make your games provably fair and then tell us it is fair. What regulations are you following? Who has audited your website? Where is your gambling certification to operate in my country? Because you can't operate without one. And they will review your website.