Hand 1 looks bad. If he is passive, his river check raise is massive strength. Passive players simply aren't capable of check raise bluffing, I'm pretty aggro and I have only done a c/r bluff on the river once or twice. He knows you have a ton of chips committed and you're probably calling, so a bluff here would be dubious. I like the river value bet, but once he raises it's a pretty easy fold against predictable players.

Hand 2 is a bit interesting, would he really bluff raise the river? It seems highly unlikely. He also isn't value raising a worse hand here either, so your hand is effectively just a "bluff catcher." If he has the hand he is representing, you're beat, but if he doesn't, then you're undoubtedly good. I think this is a marginal river call, and I don't think it's a good one really, but it's a lot better than the first one.