Blockchain technology is now part of every modern IP toolkit. It enables tamper-proof timestamping of creations, automated execution of contracts (smart contracts), tokenisation of assets (NFTs), and decentralised identification. Dreyfus & Associés operates a proprietary blockchain solution, Dreyfus Blockchain (via ceertif.com), that gives IP rights holders and tech companies access to secure, EU-based digital evidence and Web 3.0 advisory.
Reviewed by Nathalie Dreyfus, European Trademark and Patent Attorney. Last updated: May 2026.
Dreyfus Blockchain is our in-house service for digital evidence. It is designed for authors, designers, software publishers, trademark and patent applicants, and anyone who needs to prove a creation date with the highest evidentiary value.
Deposit and timestamp any digital asset at any time through a dedicated client account. Source code, photos, videos, Office files, PDFs, presentations, patent pre-deposits.
Source: Dreyfus Blockchain platform, ceertif.com 2025.
Request a bailiff (huissier) report directly from the platform. The bailiff issues the report in situ within our secure environment. Your files never leave the platform.
Source: Dreyfus Blockchain bailiff certification protocol, 2024.
All Dreyfus Blockchain data is hosted in an EU-based secure data centre. Personal data is encrypted, access is logged, GDPR principles apply by design.
Source: Dreyfus Blockchain technical architecture, 2025.
Pricing is calibrated for individual creators, SMEs and large groups, with volume discounts. Contact us for a detailed quote based on your portfolio.
Source: Dreyfus & Associés, pricing on demand.
Three reasons to integrate blockchain into your IP evidence strategy.
Indisputable date. Blockchain timestamping produces a cryptographic proof that the file existed in the exact form deposited at a precise time. Modifying the file changes the hash, breaking the proof. Courts in France and the EU increasingly accept blockchain timestamps as admissible evidence.
Cost-effective. Compared to traditional notarial deposits or bailiff statements, blockchain timestamping costs a fraction of the price and is available 24/7 without scheduling.
Audit-friendly. For corporates, blockchain timestamps integrate naturally into IP audit workflows, M&A due diligence and licensing negotiations. The hash and timestamp are independently verifiable.
Our blockchain advisory goes beyond timestamping. We assist clients on :
For deeper Web 3.0 work, see also our Web 3.0 law silo : NFT law, NFT compliance, NFT litigation and cybersecurity.
Tamper-proof timestamping, bailiff certification, EU hosting.
Drafting, review, audit coordination, legal-technical translation.
Co-production, licensing, royalty structures, secondary market clauses.
Legal qualification of tokens, MiCA assessment, structuring.
MiCA, GDPR, AI Act and DSA articulation for Web 3.0 projects.
Litigation and ADR for NFT, token, smart contract and crypto-assets disputes.
Yes, French courts increasingly accept blockchain timestamps as evidence, particularly when corroborated by other elements (deposit account logs, file integrity, bailiff certification). The Dreyfus Blockchain solution adds a bailiff report on demand to strengthen evidentiary value.
No. Blockchain timestamping is a complementary evidence tool, not a registration. For patents and trademarks, formal filings before the INPI, EPO, EUIPO or WIPO remain required. For copyright, where no registration is needed, blockchain timestamps strengthen proof of authorship.
Dreyfus Blockchain combines a secure private deposit environment with a public blockchain anchor. Your files stay on EU-based servers, while a cryptographic hash is anchored to a public chain for verifiability. This protects confidentiality while providing universal proof.
Yes, in most cases. A smart contract that meets the conditions of contract validity (consent, capacity, lawful object, lawful cause) is binding. However, courts still apply the underlying applicable law to interpret and enforce smart contracts, especially in disputes.
MiCA generally excludes NFTs that are truly unique and non-fungible. However, NFT collections that share interchangeable characteristics or function as financial instruments may fall under MiCA or under the EU prospectus regime. Case-by-case legal analysis is essential.
Yes. Blockchain certificates of authenticity, traceability tokens and dynamic NFTs are increasingly used by luxury brands, wineries and pharma to certify product origin and detect counterfeits. We advise on architecture and legal value.
