Any other ways of proving a bitcointalk account is yours except signed messages?
I wanted to sell my account but buyers need a signed message of my btc address i posted months ago and that address wasn't mine anymore due to an update made by the web-based wallet i used (coins.ph)
just to inform all users, coins.ph is an exchange and you can't use their address to sign.
Nothing really concrete, but can you not take a screenshot of the address if it's still logged there on coins.ph? That may satisfy some but not others but someone will likely buy your account without a signed message but it'll fetch less and I wouldn't recommend it.
im using coins.ph too and the old address for each account is changed and no more shown in the account.