I can assure you that these retail customer gold bars are all stored in a single deposit. I’ve toured those facilities.
I don’t know how they deal with the safekeeping of “the database” but I would bet they have something offline every day for orders made and trades settled. You know, like in the old days before digital: a book ledger.
If you want a segregated “account”, you need to take possession of the physical and store it yourself. There are options beyond your bank’s standard safe deposit box (which are pretty safe but still occasionally do get robbed).
The safest safe you can rent that I have seen so far sits in a room in a former Swiss army bunker under a mountain. Ultra high net worth folks rent segregated safe deposit space there. Conveniently, there’s a little airport just nearby if you want to transport your gold bullions in your own private jet or so.
It’s the kind of place where national banks – including the SNB – store their physical gold. Of course not all of it – they are even more paranoid than the people here wanting to avoid IBKR or insisting on having a dozen brokers custodians for their securities … ;-). The place is just one gold custody location for them. They – the national banks – get their own “account” which is a separate cage from the other cages owned by other national banks under the same mountain.
When one national banks sells gold to another, the people who run the place use a little cart to transport the bullions from one cage to the next, which might possibly be in the same or in a different room. Kind of surreal to watch when you see the logistics operator and their supervisor push as much gold as the cart is specified to carry – surprisingly small dimensions given gold’s specific weight – through the rather small hallways (carved out many many decades ago) deep under that mountain.
The entire scene lends to thinking about heist movie plots … but then again, the way the entrance is set up, you can essentially protect the place with one man and a gun even if the bad guys rock up as a commando with explosives and what not. The guy with the gun can then retreat and activate protections that … well, you won’t get through with a tank or so. In the mean time, the guy with the gun notifies the nearby police, and in the attack scenario with tanks, the Swiss army conveniently has a headquarter on alert real close.
If I ever stop posting here, I will have found a way through the many layers of protection and you’ll never hear from me again. After I die, the film rights of my memoires will be bought by Hollywood and “Ocean’s 42” will be released shortly after, still starring George Clooney and the gang, but it’s all AI generated.