Apologies, my steam account has been locked.
I'll be unable to confirm you via steam.
However, a Bitcoin signature has still not been made AFAIK.
The label you set on coinbase isn't visible to usPlease read this thread I had shown earlier:
https://support.coinbase.com/customer/portal/articles/1526413-how-do-i-sign-a-message-with-a-bitcoin-address-The thread gives a step by step guide to signing a message with a Bitcoin address, and in the end you should have
three pieces of information to write down: The bitcoin address, the message you've chosen and the signature.
You cannot set the signature by yourself, it will be automatically generated.It is not possible that the signature will perfectly match your profile ID. Perhaps the message to be signed can be it, but not the signature.
After following the guide, set the message to be signed as something like "This is LostPoet confirming ownership of steam account: 76561198085699289" and tell us the exact message and the signature which it gives you.
I repeat, you have not given a Bitcoin signature, and I am unable to confirm steam identity at this time.