<div dir="ltr">proof of existence's API is http? it looks very simple, though.</div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Mar 25, 2015 at 10:12 PM, Nathan of Guardian <span dir="ltr"><<a href="mailto:nathan@guardianproject.info" target="_blank">nathan@guardianproject.info</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I just found another: <a href="http://www.proofofexistence.com/about" target="_blank">http://www.proofofexistence.com/about</a><br>
<br>
What is proof of existence?<br>
Use our service to anonymously and securely store an online distributed<br>
proof of existence for any document. Your documents are NOT stored in<br>
our database or in the bitcoin blockchain, so you don't have to worry<br>
about your data being accessed by others.<br>
<br>
All we store is a cryptographic digest of the file, linked to the time<br>
in which you submitted the document. In this way, you can later certify<br>
that the data existed at that time. This is the first online service<br>
allowing you to publicly prove that you have certain information without<br>
revealing the data or yourself, with a decentralized certification based<br>
on the bitcoin network.<br>
<br>
The key advantages are anonymity, privacy, and getting a decentralized<br>
proof which can't be erased or modified by anyone (third parties or<br>
governments). Your document's existence is permanently validated by the<br>
blockchain even if this site is compromised or down, so you don't depend<br>
or need to trust any central authority. All previous data timestamping<br>
solutions lack this freedom.<br>
<div><div class="h5"><br>
On Wed, Mar 25, 2015, at 10:02 PM, Nathan of Guardian wrote:<br>
> This site sums up a lot of what we've been thinking about. It isn't a<br>
> notary itself though, and it still requires the user to have a bitcoin<br>
> wallet with money in it, and know how to use it.<br>
><br>
> Still this is a pretty great service.<br>
><br>
> ***<br>
> BTProof<br>
> Trusted timestamping on the Bitcoin blockchain<br>
> <a href="https://www.btproof.com/" target="_blank">https://www.btproof.com/</a><br>
><br>
> What is trusted timestamping?<br>
> Trusted timestamping allows to prove you held a document, some<br>
> information or a file at some specific point in time, in a way that<br>
> can't be forged. Read more at Wikipedia.<br>
><br>
> What is it good for?<br>
> Before signing an NDA, you can keep a trusted proof of the knowledge you<br>
> had in that field prior to to signing it.<br>
> You can prove you developed a specific revesion of your software in a<br>
> specific point in time by timestamping the hash of your revision tree.<br>
> With Git, its as simple as timestamping the current commit SHA1.<br>
> Before sharing your ideas with third parties, you can timestamp the<br>
> information you're about to share with them, as well as the fact that<br>
> you're sharing it with them, to help resolve possible disputes.<br>
> Contracts can be timestamped (along with digital signatures of both<br>
> parties) to prove when they were signed.<br>
> Musicians and other digital art producers can prove when they created<br>
> their work.<br>
><br>
> --<br>
> Nathan of Guardian<br>
> <a href="mailto:nathan@guardianproject.info">nathan@guardianproject.info</a><br>
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<div class="HOEnZb"><div class="h5"><br>
<br>
--<br>
Nathan of Guardian<br>
<a href="mailto:nathan@guardianproject.info">nathan@guardianproject.info</a><br>
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