How do you claim a block reward on a merged chain?
If I understood it right: let's say you are mining Bitcoin and Namecoin. When you find the solution to a BTC block, you include a transaction in the block to give you a block reward. If the hash of this block is also a solution for the Namecoin chain, where is the transaction giving you the Namecoin block reward? Where is the Namecoin address getting this reward? Or are Bitcoin addresses also valid Namecoin addresses? And if you are only mining Bitcoin, can you claim the Namecoin block reward for a solved Bitcoin block afterwards?