Unique Registration ID

The ID is immutable and permanent once assigned by the EU database. It remains constant through substantial modifications, software updates, and changes in ownership. This persistence ensures that all historical compliance records, from the initial Conformity Assessment to Post-Market Monitoring reports, remain linked to the correct system, creating an unbroken audit trail for the entire operational lifespan.

The identifier follows a standardized, machine-readable alphanumeric format defined by the European Commission. It is not a random UUID but a structured string that encodes metadata, potentially including:

• Notified Body identification number
• Member state code of registration
• Sequential system number This structure allows for immediate, programmatic validation of the ID's authenticity and origin by any National Competent Authority.

The Unique Registration ID serves as the critical link between all economic operators in the AI value chain. Importers use it to verify the manufacturer's compliance, distributors reference it in commercial documentation, and deployers must cite it in their own risk assessments. This creates a transparent chain of responsibility, ensuring that a system can be traced back to its Authorized Representative or original provider at any point.

The ID must be physically or digitally affixed to the AI system, its packaging, and its accompanying documentation. It is the primary key that links together disparate compliance artifacts in the EU database, including:

• The Declaration of Conformity
• The Technical Documentation File
• The Model Card Submission
• Incident Reporting Linkage records Without this ID, a system cannot legally bear the CE Marking.

Once registered, the Unique Registration ID and a subset of non-confidential compliance data become publicly accessible through the EU's centralized portal. This transparency allows civil society, journalists, and downstream users to verify that a marketed AI system has undergone the required Conformity Assessment. The public nature of the ID acts as a market enforcement mechanism, deterring the deployment of unregistered high-risk systems.

In the event of a serious incident or a Market Withdrawal Notification, the Unique Registration ID is the primary correlation key. Market surveillance authorities use the ID to instantly identify all affected deployers and linked systems. This enables rapid, targeted corrective action, such as issuing urgent safety bulletins or initiating a Registration Suspension, without ambiguity about which specific model or version is implicated.