How has the admissibility of evidence by the judicial judge from the Archive.org website evolved?
Introduction
The admissibility of evidence from the Archive.org website has gradually become an important debate in intellectual property and digital litigation. In disputes over trademarks, domain names, unfair competition or online counterfeiting, the ability to establish the state of a website on a given date is often a decisive factor in the outcome of the case.
Long regarded with suspicion by the French courts, the captures from Wayback Machine have seen a notable jurisprudential evolution, under the combined effect of the maturation of judicial reasoning in terms of digital evidence and the massive increase in litigation related to digital uses.
Internet Archive.org: nature and functioning
Archive.org is a foundation with the mission of preserving and archiving the memory of the web on a global scale. Through its emblematic tool, the Wayback Machine, it carries out an automated collection of freely accessible online content, allowing to consult previous versions of websites on given dates, sometimes over several decades.
The functioning of this tool is based on automated indexing and archiving processes, without systematic human intervention and outside any contradictory framework. The captures made result from periodic passages of indexing robots, whose frequency, completeness and scope are neither constant nor exhaustive. Consequently, the proposed archives do not guarantee either the total integrity of the contents displayed on a given date or the absence of subsequent modifications affecting certain elements of the site concerned.
The starting point of digital evidence in French law
In French law, the proof of legal facts is governed by the principle of freedom of evidence. In accordance with Article 9 of the French Code of Civil Procedure, it is for each party to establish the facts necessary for the success of its claims. Legal facts can thus be demonstrated by any means, including elements of a technical or digital nature.
This principle cannot, however, be interpreted as conferring an equivalent probative value on all the pleadings produced. The freedom of evidence is tempered by the sovereign power of assessment of the judge, who remains particularly attentive, in matters of digital evidence, to the reliability, integrity and authenticity of the evidence with regard to its evolving character and easy alteration.
It is in this context that the evidentiary question of the archives from Internet Archive.org fits. The captures generated by the Wayback Machine result from an automated archiving process, carried out outside any contradictory framework and without certification of the collected content. They do not, therefore, benefit from any legal presumption of reliability and are clearly distinguished from traditionally recognized forms of evidence, such as the judicial officer’s certificate, which has enhanced probative force.
The jurisprudential assessment of the admissibility of web archives
For several years, the French courts excluded the archives from Internet Archive.org, considering that they were not sufficient to guarantee neither the exhaustiveness of the archived contents nor their exact conformity with the state of the site at the invoiced date, in the absence of sufficient guarantees regarding their method of collection and conservation.
However, the case law has evolved gradually, first at the level of the courts and then at the level of the courts of appeal. Faced with the increasing difficulty of establishing the previous state of digital content, jurisdictions have started to admit these archives for information purposes, before recognizing them a more substantial probative value when they were corroborated by other elements contributed to the debates. This development reflects a pragmatic approach, based on a concrete assessment of the circumstances of the case. The French Cour de Cassation, on the other hand, has not yet ruled on this probative question.
Practical conditions of admissibility before the judicial judge
As part of this in-depth assessment, the judge examines in particular the consistency of the archives produced with the other elements of the file, the stability of the archived content over time, and the absence of serious objections to their manipulation or alteration. These criteria reflect a requirement of overall reliability of the evidence, assessed in the light of all the circumstances of the case.
In contentious practice, the archives from the Wayback Machine thus gain credibility and effectiveness before the judicial courts and appellate courts when they are systematically corroborated by complementary elements. They can thus usefully be associated with:
- A bailiff’s report describing precisely the conditions of access to the archives and the manipulations carried out (Paris Court of Appeal, Pôle 5 – chamber 2, July 5, 2019, no. 17/03974)
- Matching WHOIS or DNS data
- Screenshots contemporaneous with the litigious facts or even dated commercial or advertising exchanges.
This cumulative approach makes it possible to place the web archives in a bundle of concordant clues, the only one capable of satisfying the judicial judge’s requirements regarding digital evidence.
Towards enhanced security of digital evidence: the contribution of blockchain technologies
The identified limits of traditional digital evidence modes have led to the emergence of technical solutions aimed at strengthening the reliability and traceability of produced elements in court. Among these, blockchain-based technologies occupy a growing place.
The principle is based on writing the cryptographic fingerprint (hash) of a digital content in a distributed, tamper-proof and time-stamped register. This footprint, unique in nature, varies from the slightest modification of the original file. Its registration in the blockchain thus makes any subsequent alteration detectable, giving this process strong guarantees of integrity and dating.
Unlike automated archiving systems, blockchain is based on a decentralized validation mechanism and the immutability of registered blocks. Judicial jurisdictions have started to admit evidence based on this process as serious evidentiary elements, notably to establish the anteriority and integrity of digital content, as illustrated in particular by the judgment of the judicial tribunal of Marseille (1st ch., March 20, 2025, RG n° 23/00046).
However, blockchain proof cannot be understood as an exhaustive probative solution. If it can attest to the existence of content at a given date and guarantee its integrity, it remains insufficient, on its own, to establish the ownership of rights or the identity of the author of the time-stamped content. It attests to a fact, not a right. In practice, it does not reveal either the real identity of the applicant or the conditions for creating content, except to be linked with additional identification elements.
Blockchain evidence thus finds all its relevance when it is part of a broader evidentiary framework, notably associating contractual elements, dated exchanges, findings or other consistent technical evidence.
Conclusion
The admissibility of evidence from Internet Archive.org is accepted at certain levels, but their probative value remains limited and subject to an assessment in concreto. The inherent limitations of automated archiving require, in practice, systematic corroboration by other evidence.
In this logic, the blockchain appears as a complementary probative security tool, offering reinforced guarantees in terms of dating and integrity of digital content. It cannot, however, be a substitute for the legal requirements relating to the establishment of ownership of rights, which presupposes the production of a set of coherent indices.
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Q&A
Does the absence of a position by the French Cour de Cassation create legal insecurity?
The absence of a position from the French Cour de Cassation does not call into question the admissibility of these digital evidence elements which are partly admitted by the courts on the merits. This lack of position, however, maintains an assessment essentially in concreto, leaving variations according to the jurisdictions and circumstances of the case.
In practice, this situation does not prohibit the use of these elements, but it requires increased vigilance in the evidentiary strategy, which must be systematically corroborated in order to limit the vagaries related to the judge’s sovereign discretion.
Is the use of a bailiff’s report sufficient to permanently secure evidence from Internet Archive.org?
The bailiff’s report significantly strengthens the credibility of the evidence, but it does not transform the web archives into perfect proof. The judge retains the right to assess its scope, particularly if the method of consultation, the technical parameters or the date of the archives are contested in a serious manner.
Does digital evidence require an adaptation of traditional litigation reflexes?
Absolutely. Digital evidence requires increased anticipation, methodical collection of technical elements and rigorous articulation of the evidence. It is no longer limited to noting a fact, but requires demonstrating its stability, context and accountability.
Can a blockchain proof be disregarded for lack of sufficient technical explanation?
Yes. A blockchain proof produced without explanation about the protocol used, the hash method or the registration conditions can see its probative scope greatly reduced, or even be dismissed. The technical evidence must be intelligible to the judge in order to be usefully used.
Can a blockchain proof be combined with a bailiff’s report?
Yes, and this combination is a particularly effective practice. The bailiff’s report allows secure access to the evidence and its attachment to a party, while the blockchain reinforces the guarantees of integrity and dating of the observed content.

















