Jeremy
Co-founder & Author
Fondateur de LegalStamp, passionne par la blockchain et la protection des creations.
Jeremy writes about blockchain timestamping, digital evidence law (eIDAS), copyright protection, and OpenTimestamps. Trained in cryptography and digital trust services, Jeremy contributes practical guides for creators, developers, and legal professionals.
Articles by Jeremy
eIDAS Trusted Lists: What Changes With the New Format Applicable Since 29 April 2026
Commission Implementing Decision (EU) 2025/2164 updates the format of European Trusted Lists effective 29 April 2026. Decoding this technical refresh, what it prepares for eIDAS 2.0, and what it means concretely when you need to verify the qualified status of a timestamp or trust service provider.
Archiving Digital Evidence for 10 Years: Method, Formats, and Mistakes to Avoid
A timestamp proof loses all value if the original file becomes unreadable in 5 years. A practical method to preserve digital evidence for the long term.
Blockchain Timestamping vs NFT: Which Tool Actually Protects a Creation?
NFTs and blockchain timestamping are often confused. Yet their goals, legal weight and use cases differ deeply. A clear comparison to help creators choose the right tool.
Blockchain as Copyright Proof: What the 2025 French Ruling and eIDAS 2.0 Mean for Creators
A French court has accepted blockchain anchoring as admissible evidence in a copyright dispute. Here is what the ruling means, how EU regulations are catching up, and what creators should do now.
Digital Evidence Admissible in Court: The Complete Preparation Checklist
Screenshots, emails, files — how to prepare digital evidence that holds up in court. A practical checklist based on the eIDAS regulation and European legal standards.
Protect Your Idea or Project Before Approaching Investors
Before pitching to a VC, accelerator, or angel investor, timestamp your key deliverables. NDAs, pitch decks, business plans: what actually works.
Protect your photos before publishing: a practical guide for photographers and visual creators
Photo theft, uncredited use, ownership disputes: here's how to build solid proof of authorship before every publication, shoot by shoot.
Soleau Envelope vs Blockchain Timestamping: Which Proof of Creation Method Wins?
A practical comparison between France's INPI Soleau envelope and blockchain timestamping: cost, validity, legal weight, international scope, and ease of use.
Proving Source Code Authorship for Freelancers and IT Service Firms
Git alone is not always enough in disputes. Here is a practical workflow to prove code priority: repo + signatures + archive + timestamping + long-term retention.
eIDAS Electronic Timestamping: Simple vs Qualified, What Changes (and How to Verify)
Understand the difference between non-qualified and qualified eIDAS timestamping: evidentiary value, limits, use cases, and how to verify a timestamp.
Protect Your Creation Before You Share It: Timing, Workflow, and Evidence
Before you send a logo, design, or text to a client, lock in evidence of prior existence: timing, workflow, what to save, and mistakes to avoid.
SHA-256 Hash: How to Prove File Integrity (and Why It's Not Encryption)
A SHA-256 hash acts as a digital fingerprint: if the file changes, the fingerprint changes. Discover why it's not encryption, how to verify it concretely, and best practices for solid proof.
Timestamping vs Electronic Signature: Practical Differences (and When to Combine Them)
Timestamping and electronic signature do not prove the same thing. Here is what each proves, practical scenarios, and why the signature + timestamp combo is often best.
Proof of Priority: 8 Methods Compared (Cost, Delays, Evidentiary Value)
Compare 8 ways to prove that a file, idea, or creation existed at a given date: costs, delays, limitations, and recommendations based on your context.
Document Timestamping: Definition, Uses, Examples and Mistakes to Avoid
Document timestamping allows you to demonstrate that a file existed at a given date and hasn't been modified since. Definition, practical uses and common mistakes.