proof-of-existence

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

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

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.

Wudder's Python SDK

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

📒 A telegram bot for Those Who Told

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

Wudder's JavaScript SDK

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

Proof primitive for AI agents & humans on MultiversX. Anchor CI/CD artifacts and agent outputs on-chain.

Proof of Existence

pics as prooves or helpful

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