I ran into another problem: I have an address to link, and signed a message with Electrum. I can verify it with Coinig.com. Signed message: "BTX" (without quotes).
And yet, I get this error at bitcore.cc:
Error : Sign Message not match with Address. Maybe Text is not "BTX", Capslock is very important here !
Could it be BitCore only accepts compressed addresses? Those worked fine for me, while the uncompressed addresses give this error.
Update: it's fixed now
