Core and web app for Proof of Existence - the original blockchain notary service

This is my attempt to list all possible blockchain consensus out there, i welcome pull request of the blockchain community! lets make it the main reference for blockchain consensus

Decentralized Data Sharing Network - A Peer-to-peer, censorship-resistant, and a privacy-focused data sharing network

Smart contract to prove the existence of documents

precedence brings secure blockchain-powered traceability features to your already existing legacy information system

PrivateStamp: a private proof-of-existence DApp. Prove that you've had a file at a certain time without compromising your privacy.

The official Apostille Typescript repository

🐋 🐋 https://meetup.com/Silesia-Blockchain-Meetup 🐋 🐋

Frontend and Backend parts of the documents stamping service

Wudder's Python SDK

Application d'authentification de document PDF, utilisant la chaîne de blocs Ethereum.

Une application d'horodatage de documents PDF, utilisant la chaîne de blocs Ethereum.

The front-end part of stamp.gridcoin.club project

An implementation of Gregory Maxwell merkle tree approach to prove Bitcoin liabilities, in Scala.

Apostille - A blockchain notarization and timestamping solution with transferable, updatable, branded, and conjointly owned notarizations.

pics as prooves or helpful

Wudder's JavaScript SDK

Proof of Existence

Replication analysis of Irving & Holden 2016

Implementation of Proof of Existence consensus using Substrate Framework, Frame, Pallets, RUST