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
EDPB blockchain and GDPR guidelines: what they change for your digital evidence
On 8 July 2026, the European Data Protection Board adopted the final version of its guidelines on blockchain and the GDPR. Here is what they recommend and what it means for timestamping and digital proof.
If LegalStamp Shuts Down Tomorrow: How Long Your Proofs Actually Last
A timestamp proof is meant to last 10, 20, 30 years. What if the vendor disappears in 5? Why our proofs remain verifiable even without LegalStamp.
Protecting logos and brand guidelines in pitches: a freelance designer's guide
You send three logo concepts to a prospect, they pick the second one, never sign the contract, and reappear a year later with a suspiciously similar mark. Here's how to prevent that, concept by concept.
NDA + timestamping: the combo that actually protects your startup project
An NDA proves a confidentiality commitment. A timestamp proves prior existence of content. Here is why both pieces form an operational combo for a startup, and how to orchestrate it concretely before any sensitive exchange.
Verify a Bitcoin timestamp yourself: step-by-step tutorial (no LegalStamp required)
You have a .ots file from LegalStamp or any other OpenTimestamps service. Here are three methods to verify the proof yourself, two of which are completely independent of our website.
French Bailiff Digital Statement vs Blockchain Timestamping: Which One for Your Digital Evidence?
Digital statement by a French commissaire de justice (former bailiff) or blockchain timestamping? Honest comparison: cost, timing, evidentiary weight, scope. When to choose which.
eIDAS 2.0 and Qualified Electronic Ledgers (QEL): what the regulation provides for December 2026
The eIDAS 2.0 regulation introduces a new qualified trust service: Qualified Electronic Ledgers (QEL). What they are, who needs them, and why most proof-of-priority use cases will not require one.
Consultants: how to prove priority on a mission deliverable before sending it to your client
Strategy reports, audits, methodologies, sales decks: a consultant's intellectual deliverables can be contested or reused without consent. A method to lock down each delivered version and defend your authorship.
Paris Court of Appeal, 9 April 2026: an electronic signature is only as strong as its evidence file
The Paris Court of Appeal upheld an electronically signed contract once a complete contractual file was produced. What it means for evidence files, both for signatures and timestamps.
Regulation (EU) 2026/798: what remote EUDI Wallet onboarding changes (and what it doesn't)
Published on 7 April 2026, Implementing Regulation 2026/798 sets the technical standards for remote onboarding of European Digital Identity Wallets. A clear-eyed read for DPOs, CISOs and corporate counsel.
GDPR and Timestamping: What Your Digital Evidence Must Comply With
Blockchain timestamping intersects several GDPR principles: data minimization, right to erasure, immutability. A practical guide to staying compliant while building strong evidence.
AI Use Presumption: What the French Senate Bill Means for Creators' Priority Evidence
On 8 April 2026, the French Senate adopted in first reading a bill creating a presumption of use of a protected work by an AI provider whenever a bundle of indicators makes that use plausible. Decoding the text, the reversal of the burden of proof, and what it means for creators who want to gather these indicators in advance.
CJEU Pelham II ruling: why dating your versions becomes strategic in sampling and remix cases
On 14 April 2026, the Court of Justice of the European Union clarified the scope of the pastiche exception in the Pelham II case. Practical consequences for proving the chronology of your derivative creations.
Protecting a Manuscript (Book, Screenplay, Comic) Before Sending It to a Publisher or Agent
Sending a manuscript to a publisher, agent or producer without prior-art proof is an avoidable risk. A practical method for authors and screenwriters.
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.