Is there a way to find out if someone owns gold bullion bar through public record? Is there any way to track if someone has a caymen island account?

It seems it is impossible to find this information on the internet. I do not want to buy from online stores. Calling such banks as Chase and Bank of America did not help, they did not even know what I am talking about and transferred me around 10 times each before saying "we do not sell gold bars".