As of now, you can burn BTC into CHA using any Bitcoin wallet software by sending BTC to the burn address. The input must come from a single Bitcoin address. There can be multiple output addresses in any order, as long as one of them is the burn address (1ChancecoinXXXXXXXXXXXXXXXXXZELUFD).
Be careful. It's very hard to get most wallets to send from a single input,
even if you totally expect them to.