Yes. You can look at the other side of your own hand.
There's nothing in the rules, from what I see, that says you can't. So I definitely think you are allowed to do that.
From a practical standpoint, when you are dealt your hand, you'll see the dark side of your own hand while it's being dealt anyways.
There are many changes today, but not because of the company. Most changes are known as Mandela Effects. These would include that stacking is not allowed (where one player lays a draw 2 and instead of the next player drawing that amount, they can lay a draw 2 causing the next player to draw 4.) However, the rule than changed again allowing stacking on draw 2 ...