I could be wrong but the pos blocks should have your wallet address, mined pow coins will have a random address. I have mined 2 blocks using the wallet both had a random address and both for 5 coins when I checked on the block explorer they both show as new coins. I got another mined tonight but this time for 5.00004 with my address so I checked block explorer again and this one was pos.
Those 2 mined blocks were in the last 24 hours using an i5 3470, maybe not likely to happen but it does.
Yes, each POW block is paid to a new address. POS blocks are paid to the same address as the input.
So, if the address that comes with the block paid to the wallet, is yours, it is a POS block; if it isn't, is it a POW block?
Then, besides the POW blocks NiceHash pays you (a pittance, but actually pays you) in BTC something extra?
So fucking confused...
In any case, I receive payments with two addresses only -so no randomness here-: Mine and another one, but all the blocks with one or the other, no other addresses whatsoever.