As you post here on Steemit all content is written on Steem blockchain. Just go to https://steemd.com/@your_account_name and you can verify that yout content is for all times written on Steem blockchain. This entry is unique and you can reference that entry as your original work. Before blockchain era this was impossible to do on internet. Blokchains now aloud to store original content on internet. Because of that Blockchain technology is so great invention.

Stay tuned! join my initiative Upvote Myself no More, (#1), (#2)
I hope I find another noble Crypter (human of crypto world) and Steemian !!