This website claims it's using BTCRelay http://ethereumlottery.io/
and I checked their source code:
their BTCRelay contract resides at:
but as you see this is not verified or so.. How can we trust this?
To my understanding it would be better if there was a SINGLE btcrelay contract that's address can be looked up from http://btcrelay.org/ and then I can trust.
I really want ETH world to go beyond investing to applications like this but the level of trust does not really convince me with this one.