I bought a minecraft key from another person, which claimed that it was an alpha-version.
How can I check if my key is from the time of the alpha-version?
It seems that there is no way to determine the version of your key for yourself (1, 2).
You might be able to find out by contacting Mojang directly. Twitter accounts are listed here. You could also try contacting firstname.lastname@example.org or email@example.com.
Source : Link , Question Author : Joschua , Answer Author : sjohnston