Is there some type of eos data field where I can store my Bitcoin address and other crypto addresses inside the eos blockchain? I should be able to query this data easily too.

I want to create a service where one can store their btc address and a signed message using the btc private key of the EOS account name. This proves that the EOS account name owns that bitcoin address.

Now I can just give out my eos account name without having to remember or lookup my bitcoin address and people can now send me BTC.

How can i do this?