MErge accounts without access to email addresses

I'd like to keep the proffalken alias as it's my handle elsewhere on github etc.

I've just noticed that it's setup with greenandsecure.co.uk which was a previous business I owned, proof of which can be found at https://find-and-update.company-information.service.gov.uk/company/06769520/officers

Hi, do you have access to PGP or the SSH keys? We can use that to verify whether the account belonged to you or not.

I might have access to the SSH keys, unlikely that I've got access to the PGP keys as they were on work laptops at employers I no longer work for.

I might have the SSH keys, how do I compare what I've got in my backups with what's on the system to see if they're a match?

These are the corresponding public keys: https://launchpad.net/~proffalken/+sshkeys for that account.

I can encrypt a message using the public key that you can decrypt using your private key, in order to prove you have the access to private keys.

OK, let me see if I can find them - they're not on this laptop so I'll need to check backups, I'll post here if I find them.