Protect your creations and your innovations by creating anteriority proofs


An alternative to the sealed envelope serving as a proof of priority at a fraction of the cost

ValidIP is a Validity solution

  • Group 93Created with Sketch. Authenticate your diplomas
  • Group 93Created with Sketch. Secure your bills
  • Group 93Created with Sketch. Protect your artistic creations

Validity relies on Blockchain technology


The signature is stored on the blockchain, and is therefore not centralized, for maximum security.


It is impossible for anyone to modify the signature once stored on the blockchain.


Each insertion of a signature is accompanied by a UTC timestamp, directly supported  by the blockchain.


Access to the signature can be done independently of the Validity service. It is thus very easy to carry out an audit.

Validity, A solution Powered by HashnStore SAS
Developed on Factom

Validity is a solution developed by HashnStore SAS based on the Factom blockchain protocol.

Our Team

Matthias Fortin - CEO, HashnStore

Matthias became interested in Blockchain technology in 2017. With Frédéric, he founded HashnStore, one of the 28 operators of the Factom protocol. He is responsible for the software architecture and legal issues.

Frederic Faye - CTO, HashnStore

Frédéric discovered Blokchain technology with Ethereum in 2015. Quickly convinced of the technical limits of this protocol, he then became interested in Factom from 2016. Co-founder of HashnStore, he is the Tech Lead.

Contact us

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