And indeed, the BTC transaction is traceable, however it's not reversible.
The info is out there in the blocks, it's just a matter of identifying where your 23.5 was, and watching where it went.
http://blockexplorer.com
If you know what public key you used to deposit there, you should be able to trace through and see.
There's a good reason to record everything you do, down to the minutest detail.
I did that with all my transactions (recording them), then for some reason stopped at the time there was all that money to be made with NMC mining and trading. I withdrew a load of money from MT Gox the day before the site was shutdown, but the money has not been transferred to my bank account I would have to stop recording things then, dumn arse!!!!!!
I have just discovered god, and now doing a lot of praying