I think we need to sign-in a message with Bitcoin wallet/address to prove ownership of BTC and post it into your Smart Contract to get equal BTH. Am I right?
Yes, exactly. You can create an ETH address and sign it with your bitcoin wallet. We will provide a verification contract for you to send this signature. Once verified, your ether address will reserve the right to claim the bitcoin address balance.
We will provide detailed guide once we complete our verification contract, ETA 2 week.
@pure_happiness_inside: This should answer your question, too