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Simple. Social. Secure Document Signing

A decentralized (dApp) social document signing tool where you own and control your own documents, contracts and data.

Finalize the document as a legally binding agreement by saving it's hash as a smart contract to the blockchain.

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Blockusign Demo

If Docusign built on the Blockchain

Blockusign Demo

If Docusign was built on the Blockchain

It's built on BlockStack

   Beta Release

(1) Login with your own Self Sovereign Identity

Login with Blockstack. It's a Self Sovereign identity that you own. No more worrying about your data being leaked with Facebook login.

(2) Upload a PDF securely with data privacy

Upload a document from your local file system to your own personal secure storage bucket in the cloud. Only you and the person you share the file with have the keys to access this data. The upload never touches our servers NOT Blockusign. NOT any government. JUST YOU! This is the data privacy you have always dreamed of. GDPR and HIPAA complient.

(3) Annotate

Drag and drop the "sign here" annotation so the recipient knows where to sign. Don't forget to add some emojis for custom flaire!

(4) Collaborate socially

Email a link to the document to your signer, and communicate with the built-in chat. A document log history is viewable from the chat, too!

(5) Sign

The recipient signs the document. The transaction will be digitally signed and stored on the immutable ledger. This signature is unique to them and proves the date and time they signed it.

Current document signing systems can be forged since they are architected using a central server owned by a central company.

(6) Finalize - Save the document as a Smart Contract to the Blockchain

Finalize the document as a legally binding agreement by saving it's hash as a smart contract to the blockchain. It's like a digital notary and is signed and timestamped using the Proof of Existance protocol. The hash of the document is sent to a smart contract where both parties digtally and cryptographically sign it.

The hash is stored on an immutable ledger. Security is maintained because the actual document is never stored on the blockchain. Even if one tiny space is added to the document after it's signed, it will not match, thus proving the document was changed or tampered with.

In the event of a legal dispute, the authenticity of the document is proved by comparing your local document's hash to that stored on the blockchain. If the hashes match, the document is valid.

How does it work?

Learn more about Blockstack

How does data storage work?

Learn more about automerge.js

Donate: BTC - 1Jw3xsPzmYus3ke4XYXAHHyzpxD1sjQVta | Github