We only require "proof of ownership" if you're looking to merge previously-made, unassociated transactions into your BlockTrades ledger, and this only requires you to prove that you have keys to the wallet that you are trying to associate. So while it does link an email address of your choosing to the account you're making transactions from, it does not actually tie these accounts to your real-world identity in any way.
If you are concerned about your privacy we welcome you to register multiple email addresses with us and keep a separate BlockTrades login for each of your cryptocurrency wallets.
Oh interesting. Ok thanks. 👍
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