How to use Ethereum conract to get credit for the Sale contribution?

Mindey_IMindey_I Member Posts: 2
edited March 2016 in Ether Sale
So, I had invested into Ethereum twice:

How could we use Ethereum contracts, to actually retain the credit for my contribution? I have pieces of information, like the control of the original e-mail address, which I used for the backup of wallets, and a record of the Bitcoin transaction in Cryptsy associated with my account, and my Ethereum Forum account created at about the time of the Sale.

While according to the the ETH protocol, this is impossible (e.g., other pieces of evidence are invalid, only the password is valid), is it possible to create a contract that credits Ethereum itself for me, because of these conditions?
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