A method that uses Bitcoin or Bitcoin-like technologies to authenticate that a certain information was published at a certain date, or was known at a certain date.

The technique entails encoding the secure hash of a certain publication (plaintext) inside the Bitcoin blockchain. It was probablly first described in the paper from 2012 titled “CommitCoin: Carbon Dating Commitments with Bitcoin” (extended abstract and technical report).

Source

http://bitcoin.it/

See Also on BitcoinWiki

• Tokeneo
• U Run It
• Depository network
• GastroAdvisor
• VectorZilla