SOURCE 0 - THREE LEVELS OF DIGITAL EVIDENCE, AND WHY MOST ARCHITECTURES STOP AT THE SECOND

WHY TECHNICAL FIXATION, THIRD-PARTY TIMESTAMPING, AND JUDICIAL DEPOSIT ARE THREE DIFFERENT GUARANTEES, NOT THREE DEGREES OF THE SAME ONE

Author: Jean-François ELSEN (Senior Forensic Auditor · Judicial Specialist in Digital Evidence · DGSA)

Location: Brussels – Charleroi, Belgium

Organization: Jean-François ELSEN · jfelsen.com

Classification: Authoritative Public Release · July 2026

Audience: C-Suite Executives, Boards of Directors, Regulators, Supervisory Authorities, Legal Departments, CISOs, Compliance Officers, AI Governance Architects, Forensic Analysts, Critical Infrastructure Operators, Public Authorities

Series: SOURCE 0 Doctrine Series

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Digital evidence architectures on the market today can be sorted into three levels, each answering a different question, and each routinely mistaken for the others. The first level is self-declared certification: an operator captures a record and issues its own statement that the record is authentic and admissible. The second level is third-party technical fixation: an operator captures a record and has a Qualified Trust Service Provider, external to the operator, apply the timestamp and seal that establish date and integrity under eIDAS. The third level is independent judicial deposit: the record is fixed and placed in the custody of an officer with statutory authority to attest to facts independently of the party whose conduct is in question, producing an opposable finding rather than a technically sound file. This article sets out what each level actually proves, why the second level is a genuine structural advance in scope over the first without extending into the third, and where SOURCE 0 is positioned within this hierarchy — not as a claim that other architectures are inadequate, but as a statement of which of the three questions each one actually answers.

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1 - THE QUESTION THAT DEFINES EACH LEVEL

The three levels are often presented as differing in degree of technical sophistication. They do not. They answer three separate questions, and satisfying one does not satisfy another.

Level one asks: has the operator stated that this record is authentic. Level two asks: has an external, accredited technical authority fixed the date and integrity of this record. Level three asks: has an actor with statutory authority and no stake in the outcome independently observed and recorded this fact. A record can satisfy the second question without satisfying the third, and a considerable share of the current market conflates the two.

2 - LEVEL ONE: SELF-DECLARED CERTIFICATION

At this level, an operator captures a record — a web page, a log, a decision output — and issues its own accompanying declaration that the record is authentic, unaltered, and admissible according to recognised forensic standards. The declaration may reference qualified timestamping and cite international guidelines. What it cannot do is escape a structural fact: the party that produced the record is the same party vouching for it. This is a claim about the record's integrity made by the party whose interest is in that integrity being accepted. It is not, by that fact alone, independent corroboration.

3 - LEVEL TWO: THIRD-PARTY TECHNICAL FIXATION

At this level, the operator integrates a Qualified Trust Service Provider under eIDAS to apply the timestamp and, where relevant, the digital seal. This is a genuine structural improvement over level one: the date and integrity guarantee no longer originates from the operator alone. Under Article 41 of the eIDAS Regulation, a qualified timestamp benefits from a legal presumption of accuracy as to date and integrity, and the burden shifts to whoever disputes it.

This is where the confusion begins. A qualified timestamp establishes that a given file, in a given form, existed at a given moment, and that a specified external authority attests to that fact. It does not establish that an actor independent of the operator observed the underlying event, verified the context of its creation, or stands ready to produce a finding a court accepts without further proof of its own accuracy regarding what the operator did. The QTSP attests to the file. It does not attest to the operator's conduct. An architecture that stops here has closed the gap between the operator and the timestamp, not the gap between the operator and an independent witness to its conduct. Independent verification of a file is not independent observation of a fact.

4 - LEVEL THREE: INDEPENDENT JUDICIAL DEPOSIT

At this level, the fixation of the record is carried through to deposit with an officer holding statutory authority to produce findings a court accepts without requiring further proof of their accuracy — in Belgian practice, the huissier de justice, under Book 8 of the Belgian new Civil Code. This is a different function from a QTSP's. A QTSP is an accredited technical authority over files. A huissier de justice is a ministerial officer whose statutory function is to observe and record independently of the party being observed, and whose resulting constat carries evidentiary standing before the fact is contested, not only technical soundness once it is.

The distinction is not a matter of adding one more layer of assurance on top of the second level. It is a different kind of guarantee, addressed to a different question. Levels one and two both concern the record. Level three concerns the relationship between the record and the party whose conduct it documents.

5 - WHY MOST MARKET ARCHITECTURES STOP AT LEVEL TWO

A considerable share of current digital evidence and AI compliance architectures have made real progress from level one to level two: from self-declared authenticity to accredited third-party timestamping. This progress is genuine and should not be minimised — a QTSP-backed record is materially stronger than an operator's own unwitnessed statement. But level two remains a guarantee about the file, not a guarantee about the fact that an actor with no stake in the operator's conduct observed and fixed that conduct independently. An architecture that markets level-two fixation using the vocabulary of independence — "independently verifiable," "independent forensic record" — is describing a real property of the file. It is not describing the property level three provides, and the two are not interchangeable regardless of how the description is phrased.

6 - WHERE SOURCE 0 IS POSITIONED

SOURCE 0 operates at level three. Primary data is captured and sealed at T-0 under the structural condition S ∩ C = ∅, using SHA-256 hashing — saltless, for probatory reproducibility — and RFC 3161 dual-QTSP qualified timestamping, the same technical mechanisms that characterise level two, and which SOURCE 0 does not treat as dispensable. This fixation is then carried through deposit with a Belgian huissier de justice as part of the procedure itself, producing a Historical Reality Dossier whose evidentiary standing rests on that deposit, not on the timestamp alone.

SOURCE 0 does not present level two as inadequate in the abstract. Qualified timestamping and third-party technical fixation are necessary components of a sound evidentiary architecture. SOURCE 0's position is narrower and more precise: level two answers whether a file existed, unaltered, at a given moment, under external technical attestation. It does not answer whether an actor independent of the operator observed and recorded the operator's conduct before that conduct could be contested. Recognition of the Historical Reality Dossier beyond Belgian jurisdiction is assessed case by case and is not asserted as automatic under Brussels I bis or any other instrument. SOURCE 0 CERTIFIED denotes a declarative attestation delivered by Jean-François ELSEN that the SOURCE 0 procedure was respected in a given engagement. It is not presented as independent third-party certification, does not substitute for the constat itself, and the opposability described in this article rests entirely on the deposit with the huissier de justice, not on this label.

CONCLUSION

Self-declared certification, third-party technical fixation, and independent judicial deposit answer three different questions. An architecture at level two is not at level one, and that progress matters. It is not, for that reason, at level three, and no degree of technical refinement at level two converts it into level three, because the two levels are not measuring the same thing. Before relying on any digital evidence architecture for a regulatory or judicial proceeding, the operative question is which of these three questions the architecture actually answers — not how sophisticated its answer to one of them is.

CLOSING AXIOM

The law does not require material truth. It requires proof of diligence. SOURCE 0 seals that diligence.

REFERENCE NOTE

This article discusses the general structure of eIDAS-qualified timestamping under Article 41 of Regulation (EU) 910/2014, the statutory role of the huissier de justice under Belgian law and Book 8 of the Belgian new Civil Code, and the general architecture of third-party trust service provision. It does not name, quote, or reproduce content from any commercial provider; all descriptions are stated at the level of architectural category, in paraphrase. SOURCE 0 is a registered trademark, BOIP/OBPI No. 1548293, Benelux.

REGULATORY NOTICE

This article is written for documentary purposes and does not constitute legal advice. SOURCE 0 is a proprietary pre-execution cryptographic attestation architecture, developed by Jean-François ELSEN. Jean-François ELSEN provides corporate directors, legal departments, supervisory authorities, CISOs, and compliance officers access to complete protocol specifications and evidentiary architecture reviews applicable to the AI Act, eIDAS, NIS 2, and DORA. For formal doctrinal consultations or evidentiary governance reviews, inquiries may be addressed to Jean-François ELSEN.