Relation between Livecasino and Bitcasino: Yes. We are the younger sister (brand) of Bitcasino. Our main difference is that we are more focused on Live Games.
That sounds great. You are an existing company with new focus/goal in the industry. Hopefully you will achieve that too soon.
Unfortunately the person that was managing that account left the company and we do not have access to the private key of the Bitcoin wallet associated with that account. Because of that we could not sign a message with that key to provide a proof of identity. Since we know that BitcoinTalk is the most important forum in the crypto universe we decided to create a new account with username _livecasino.io_
You could try to reach the forum administration and/or try to go through the recovering process. Possibly admin would allow you to use that account if you could provide the authenticity of the site you own.