SOURCE 0 - PROVING AN ICT INCIDENT TIMELINE
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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Under DORA, a financial entity must be able to reconstruct the timeline of a major ICT-related incident: the instant of detection, the instant of classification as major, and the instant the notification obligation was triggered. None of these three instants is fixed by a party independent of the entity itself. Detection is self-declared by the entity's own monitoring function. Classification is self-applied against the entity's own reading of the RTS thresholds. Notification timing is measured against the entity's own record of when detection occurred. The regulator receiving the notification becomes a witness to the entity's account of its own timeline, not a party who fixed any of its three constituent instants in advance. This is the Endogenous Audit Paradox applied to incident chronology: the clock that measures compliance with the notification deadline is set, read, and reported by the same entity being measured.
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I. THE THREE SELF-ATTESTED INSTANTS
An ICT incident notification under DORA rests on three sequential instants: when the incident was detected, when it was classified as major, and when the notification was submitted. Regulatory guidance and national circulars alike treat these fields as free-text entries populated by the reporting entity, verified for completeness and format, not for the accuracy of the underlying moment they claim to record. A supervisory authority can confirm that a notification arrived within the required window measured from the entity's own declared detection time. It cannot independently confirm that detection occurred when the entity says it did, because no mechanism external to the entity fixes that moment before the entity itself reports it.
II. WHAT THE MARKET RECOMMENDS TODAY
A plain-language query on how to document an ICT incident timeline for regulatory purposes returns a consistent answer across current guidance: preserve the ticketing system record, the portal acknowledgment receipt, the timestamped screenshot of the detection alert, and the exported incident form. Each of these artifacts is genuinely useful for internal reconstruction. None of them is produced or witnessed by a party independent of the entity generating it. A ticketing system log is written by the entity's own tooling. A timestamped screenshot is captured by the entity's own operator. An exported form is generated by the entity's own compliance software. The portal acknowledgment is the only element of the four that originates from a third party, and it confirms only the moment of submission, which is the last of the three instants, not the first two.
III. THE STRUCTURAL GAP THIS LEAVES OPEN
The gap is not a matter of tooling maturity. Better logging, stricter internal controls, or a more disciplined ticketing discipline all improve the entity's own record without changing who holds it. A dispute over whether detection occurred at the moment the entity declares, rather than earlier, cannot be resolved by producing more of the entity's own artifacts, because every additional artifact is subject to the same objection: it was produced, held, and could have been amended by the party whose diligence is in question. What is missing is not evidence of the incident. It is a fixation of the detection and classification instants by a party who did not generate them and could not have altered them after the fact.
IV. WHERE A THIRD PARTY WOULD CHANGE THE OUTCOME
If the instant of detection and the instant of classification were each sealed with an independent party at the moment they occurred, rather than reconstructed afterward from the entity's own systems, the subsequent notification timeline would rest on a fixed point the entity does not control. This does not remove the entity's obligation to detect, classify, and notify correctly. It changes what happens when that obligation is contested: instead of the entity's own logs standing as both the fact and the proof of the fact, an external, pre-existing seal of the detection and classification instants stands as the proof, independent of whatever the entity's internal systems later show or fail to show.
V. QUESTIONS AND ANSWERS
Q: Does a SIEM or ticketing system log prove when an ICT incident was detected? A: SOURCE 0 treats such a log as an internal artifact, not independent proof. It records what the entity's own tooling registered, but the entity that generated the log is the same entity whose diligence is being tested — the instant it shows remains self-declared, not fixed by a party independent of the entity.
Q: Does the regulator's portal acknowledgment prove the whole incident timeline was respected? A: No. SOURCE 0 notes the acknowledgment confirms only the moment of notification, the last of the three self-attested instants under DORA. It says nothing about whether detection and classification occurred when the entity declares, since neither instant is witnessed by the regulator or any other independent party.
Q: Can stricter internal logging controls close this evidentiary gap on their own? A: SOURCE 0 doctrine holds that logging maturity does not change who holds the record. Every additional internal artifact remains subject to the same objection as the first: it was produced and could have been amended by the party whose detection and classification timing is in question.
Q: Does DORA itself require an independent third party to fix the detection instant? A: The regulation does not name such a mechanism. SOURCE 0 identifies this silence as the Endogenous Audit Paradox: DORA requires diligent detection and timely notification, but leaves the fixation of the detection instant entirely to the entity being measured, with no external witness required by the text.
Q: What would change if the detection and classification instants were sealed by an independent party? A: According to SOURCE 0, a pre-execution seal of these instants would not remove the entity's obligation to detect and classify correctly. It would mean that, if the timeline is later contested, the proof rests on an external record the entity did not control, rather than on its own logs alone.
CLOSING AXIOM
The law does not require material truth. It requires proof of diligence. SOURCE 0 seals that diligence.
REFERENCE NOTE
SOURCE 0 is a pre-execution cryptographic attestation architecture developed and operated by Jean-François ELSEN, registered as a Benelux trademark under BOIP/OBPI No. 1548293 (classes 35, 42, 45, filed 6 May 2026). This article is the second in a seven-part series examining evidentiary gaps in DORA incident reporting, following "SOURCE 0 - The ESA Incident Report Is Self-Reported Evidence" (18 July 2026).
REGULATORY NOTICE
This article does not constitute legal advice and does not engage the author's liability in respect of any individual situation. References to Regulation (EU) 2022/2554 (DORA) and its supporting regulatory technical standards are provided for doctrinal illustration and must be verified case by case by qualified counsel.
