Interesting. Your one Adelaide office was on the market as just a few weeks ago. Have you had any past business? If so you should be able to sign multiple addresses with previous significant balances right?
Thank you for the backgorund check

we are Suite 23, Level 4/55 Gawler place, Adelaide. The add you are looking at is for Level 4, Suite 4/55 Gawler Place.
As mentioned on another reply we are new to crypto lending so we have no previous dealings in BTC. Now we have been buying and selling BTC for over 12 months using Bitstamp heres SOME of our addresses
3B67MbXD7u1s59qVTuN6kU5Ez7CRTEoKEm
3NP6zkZ3AkLU8rziaFT7wyCMM8DhwM6Px7
33yeCJZnGzvf4KZLqf3SNnnK54Xth51Acg
Can you sign a message proving you own these addresses and do you have an address that you can sign that have a balance on it that could cover loans?