BELEM leverages blockchain to help you unlock new business opportunities


Demonstrate blockchain added-value and use-cases relevance:

  • Identify the best suited blockchain for your project
  • Implement in agile collaboration with your teams
  • Test and promote your project during a pilot phase

We are experts in Bitcoin, Ethereum, Corda, Tendermint, Tezos.


We have trained over 1000+ professionals since 2015:

  • Bitcoin, blockchain, DLT & crypto-assets
  • Fundamentals of blockchain for the banking, finance and insurance industry
  • Blockchain development: Bitcoin, Ethereum, Cryptography

We deliver both off-the-shelf & tailor-made courses.


We help you bridge the gap between PoC and live production:

  • Build the business case (ROI, BP)
  • Governance, Compliance & Legal
  • Operation of your blockchain application


Get a deep understanding of the latest blockchain innovations:

  • Blockchain and DLT technologies
  • Cryptographic privacy and confidentiality techniques
  • Protocol security and scalability

What we do

Digital Workflow

Blockchain protocols and smart contracts facilitate process management involving multiple independent parties sharing a common business workflow.

We build common ledger infrastructures for our clients’ workflows:

  • Use-case analysis and architecture recommendations
  • Integrations to existing systems
  • Platform technology choice
  • Smart contracts implementation and review
  • Deployment, running, monitoring and maintenance

Blockchain Document Workflow

The Conseil Supérieur du Notariat and its branch ADSN started a blockchain initiative aimed at bringing transparency, immutability and security to a common ledger of official legal acts.

The Enforceable Copy (“Copie Exécutoire”) is the authentic copy of a legal document handed over to the bailiff to obtain the execution of a mortgage seizure. This current process is:

  • Paper-intensive
  • Prone to loss and delays
  • Opaque

Blockchain offers a publicly available and verifiable document status to banks, notaries, lawyers and citizens. Blockchain ledgers attribute a unique stamp to documents and operations making them official, while Smart Contracts facilitate atomic ownership transfers so nothing can get lost in the tracks.


Digital Assets

Tokenization of assets can enable fractional ownership, rapid settlement, reduction in direct costs, increased liquidity and market depth, automated compliance, and asset interoperability.

We help our clients build and run tailor-made made asset-backed tokens:

  • Regulatory framework
  • Issuance process
  • Smart contracts implementation and review
  • Platform technology choice
  • Reconciliation tools

Asset-backed token

French institutional banks are actively studying asset-backed tokens and are keen to explore how a fiat-backed stable coin can facilitate asset swaps and trades.

Building a stable Euro token requires a suited investment vehicle and a proper legal framework.

Applications include financial securities Delivery-versus-Payment.

We monitor the stablecoin landscape, regulatory environment, and market needs for a Euro Stablecoin

We help our clients defining a governance model for token issuance and KYC / AML enforcement.

We developed an stable coin implementation on Ethereum with major French banks.


Digital Identity

Trustworthy digital identification has been one of the main challenges facing the internet ever since it was invented. Blockchain technology doesn’t just allow for the creation of a better digital ID, but rather presents an opportunity to create a “self-sovereign” identity.

Public Vote on Ethereum Blockchain

To address the shortcomings of traditional voting systems, BELEM has developed a secure remote voting tool whose transparent and reliable result can be audited by anyone. A truly democratic solution.

Thanks to Blockchain and its tamper-proof ledger, organizing an inviolable election becomes simple and inexpensive

The online voting solution developed by BELEM is suitable for any kind of election, professional or political: general meetings, executive committees, council meetings, elections of representatives, referendums, citizen consultations, deliberations. Consulting citizens becomes straightforward.


Data Management

A shared repository which can handle all reporting obligations in a transparent and auditable manner, enforce business logics, and create a trust protocol between financial institutions and regulators.

Blockchain systems also have the potential to create an electronic voting system that allows for auditing while preserving anonymity of an individual’s votes and that prevents record tampering.

Distributed Financial Reconciliation

EMIR and SFTR financial regulations aim to reduce risks by improving transparency in the securities financing and derivatives markets, notably through reporting obligations.

All counterparties involved must report trades to at trusted third-party, a Trade Repository to provide more transparency to regulators.


Intellectual Property

Paving the way for a new notarial market, BELEM has developed an authentication tool that provides a simple, economical and safe way to record and protect personal or business data (industrial patent, certificates of birth/death, proof of residence and solvency, financial market data, diplomas, land and proof of ownership of physical items).

Blockchain enables to record a tamper-proof, irrefutable, and immutable proof of existence of data or documents. The time stamp of the latter via its digital signature serves as proof of its existence at a given date.

The content of the data being registered may be shared or remain confidential, but the footprint of the data can be audited by anyone. Security of the data is ensured. The inviolability of Blockchain counteracts the vulnerability of existing notarial processes.

Data Sharing

We developed an innovative platform that relies on cryptography to deliver the next wave in data sharing. Our solution enables independent parties to organize decentralized calculation on private data without revealing their inputs.

Any organization can easily set up a community of players, customize all calculation rules, and may decide to share the result directly with an external party, like a client or a regulator.

Transparency and data privacy are no longer antithetical.

The scope of our platform is large but specifically addressing all areas where parties wish to analyse data without revealing their inputs: like in finance, insurance, healthcare, e-commerce, Internet of Things and much more.


Blockchain is a major technical discovery in computer science and it is contributing to advances in social and economics fields way beyond the digital world. Record, share, store, distribute data or value in reliable and transparent way, without corruption without relying on third parties, are the the promises of blockchain.

Data and value exchanges do not rely anymore on a single central point of failure but is rather built on top of peer-to-peer relation, in a decentralized manner ensuring complete robustness to the system. Transactions are authenticated and validated by computer nodes participating in the network. Every transaction is timestamped inside a block that it itself chained in a cryptographic ways to the previous blocks.

The autonomous distributed architecture of Blockchain is changing the notion of trust improving our society economic and social organization.

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The security and robustness guarantees brought by blockchain technology to cryptocurrencies are of particular interest to financial institutions. Blockchain offers the opportunity to rethink financial interactions while improving the security of transactions and lowering operational costs. This study offers a comparison of distributed ledger technologies. It intends to assist decision making within financial institutions wanting to build distributed infrastructures and leverage a technology suited for finance and banking applications.


The Casper project is a research project initiated by the Ethereum project. It aims to come up with an improvement of the Ethereum blockchain that makes it possible to use a blockchain mining mechanism that consumes less energy than existing solutions. Casper includes two lines of development: the Friendly Finality Gadget (FFG) and the Correct By Construction (CBC). Initially, Casper FFG was to be deployed on the Ethereum public blockchain in 2018. Nevertheless, the progress made by the Ethereum teams on Casper CBC led to postponing this deployment in order to give preference to the CBC approach for a more comprehensive development of Ethereum.

This report was conducted for Crédit Agricole CIB.

Early-stage fund raising with smart contracts


Smart contracts offer tremendous opportunities to secure and digitize company equity and contracts management.

As a service for our customers, we built a platform to manage SAFE investments and contracts.

For more information about the AIR/SAFE contract : Announcing the Safe, a Replacement for Convertible Notes, Y Combinator

Bitcoin Lightning Network for e-commerce


Le Lightning Network est un nouveau protocole Bitcoin pour des transferts ultra-rapides. Pour en savoir plus sur les grands principes de fonctionnement du Lightning Network, n’hésitez pas à parcourir notre précedent article sur le sujet.

Le réseau Lightning est en développement, plusieurs équipes travaillent en effet sur des implémentations indépendantes afin de préserver l’aspect décentralisé du Bitcoin. Afin de tester le réseau LN en situation réelle, nous avons ouvert une boutique éphémère qui accepte les paiements en Bitcoin via le réseau Lightning. Nous vous proposons ici de décortiquer de façon concrète le fonctionnement d’une transaction sur le réseau LN.

Sport forecasting with Smart Contracts


We wrote a smart contract in Solidity to manage an open, hopefully secure, mutual betting game. A player inputs its forecast for World Cup games from Group phase to Final. The more accurate the prediction, the more points the player gets. Players in the top 1% split all the pool – more precisely we use a square root function to spice things a bit. A player buys a ticket for a fixed price, but can buy several tickets. You have a little chance to win big.

You can find the full code of the smart contract here.

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