A blind crypto authentication service that certifies that picture, video & audio files were recorded at time X and have not been altered.
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Replying to @St_Rev
@St_Rev one of a few implementations: http://www.proofofexistence.com/about1 reply 1 retweet 0 likes
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. Banned in Sweden. SubGenius, Zhuangist, white-hat troll. Defrocked mathematician. Brain problems.