Bitcoin Forum

I came across this as often look at great domains to see what's there and was very pleasantly surprised.
I think this is an amazing idea and they are using the bitcoin blockchain

perfect for sealing your idea whether graphics, concept or whatever without wasting tons on trademark, copyright crap
a welcome addition I think!

https://www.proof.com/

best of all free, or a tiny fee on blockchain

makes easy for people not as tech savvy as some

did you check this topic?
https://bitcointalk.org/index.php?topic=965883.0

that is good too, thanks for link

...

cakir, Guido

Great thread!  I put up a hashed document on the blockchain using proofofexistence.com (http://proofofexistence.com).  It cost me about $1.50 (in BTC of course).  My original document was hashed using their SHA256 service, then put up.  I can now prove that I put up that hashed message by putting in my original message, and having the hash done again, it will match the original.  The process is relatively simple to use.

I asked the owner of the site to consider making it even easier to use by allowing a "Cut & Paste" message to be hashed as well.

*   *   *

A new company factom.org (http://factom.org) is looking into putting hashed documents (like property title records, etc.) on the blockchain.  Their website explains it much better than I can.

...

Here is another data-on-the-blockchain company:

https://bitproof.io/

I just put up the same document as I did the other day via proofofexistence.com.

I also am waiting to hear back from them with a couple of questions I had.



EDIT: I see that cakir beat me to it (bitproof).