OK, thanks, so if i make a listreceivedbyaddress rpc call to bitcoind I would see a new address with amount 50 btc?
No, because the BTCs are bound to a wallet and not to a address ..you can use multiple addresses to receive and send BTCs to/from the same wallet.
"listreceivedbyaccount" will display (among other infos) as "amount" the total amount received by addresses with this account. So when the daemon is placing the 50 BTCs directly into the wallet there will be no address that received it.
You are more looking for the call "
getbalance"