No cryptographic proof owner is the original
I guess I still have the access to the addys posted in my early days to sign a message.
I would say then show everybody that we are wrong and you are right for sign a message via one of the old addresses you posted.
Saddly your Account is a very old one and you still missed to post in the
Stake your Bitcoin address here1JvUpZkXynDUhsqBEFLukEi2TCS7meKmfF
1FjTWnJP1BwLh9aJqqKuJKCNzypo4Cu52F
12DPg31ahx3RVcUEzAizdY3opxTSJuWpnM
1NGeVpgunUA1JuzNNddtceYHqYCfPaZBXT
1P6TDeBp7s4Ua95R4ABgzffyKLRaBgMQY2
bc1qswf0jz75luycwde46zz2zfrf9jm63zzmfw94j0
If you can make a message from you oldest one i guess that would be fine.