This is the same for all banks. Obviously technical setup etc. differs depending on how the bank is doing it (build your own custody solution or do sub-custody with third party sub-custodian).

Generally though, in Switzerland, thanks to changes in Swiss law and banking regulations, banks can separate digital assets from their balance sheets. This allows them to offer true custody accounts, ensuring that assets belong to the client. By law, these assets are fully segregated from the bank's estate during bankruptcy and are returned to the client.