We're excited to announce the opening of Bitproof.io!

http://i.imgur.com/uHGb3oy.png

Bitproof is a decentralized online notary that lets everyone (even your grandma) certify their files in the Blockchain.

What type of certification?
We provide Proof of Existence + Proof of Ownership + Proof of Integrity

Businesses, artists and researchers can protect the integrity of their contracts, put a timestamp on them, prove they are the owner of their creations and prove that the content of a file hasn't changed since the certification.

How do I use Bitproof?
- Drag and drop your file
- Create an account (choose a strong password - this is super important)
- Your file is certified in the Bitproof system (encrypted/hashed/signed client side)
- You can access all your certificates on any devices with your password

Vision
Files can be duplicated millions of times, certificates cannot. We bring uniqueness to files that aren't unique.

Bitcoins have value because they are unique and can't be double spent, certificates bring the concept of value to files in a digital world.

Technical details: for the geek
We put in the blockchain hash(signature(file.hash)).
The proof can be validated with the file's content and the public key. The private key lets you manage the ownership (transfers, issue new certificates...).

We give the signature, the hash and the private/public keys to the user (we also store it on our servers (encrypted with your password client side)).
The signature provides you with Proof of Ownership even if you share the file (hash).
The Proof of Existence is possible thanks to the file's hash and the block's timestamp. However, time isn't always accurate (+- a few minutes) in the Blockchain, that's why we're currently creating an internal transactions tree on top of the Blockchain (also hashed in the Blockchain) with exact timestamps: transactions are ordered, recursively hashed then all put in one hash in the Blockchain every few minutes.

About Bitproof
Bitproof's offices are located in the Silicon Valley, 15 min away from Palo Alto, California.
We are trying to raise funds and are building our team.

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