This is the highest-sovereignty variant of RKP-3 (Hybrid). The anchoring mechanics are identical - the difference is that both the cloud infrastructure (OVH) and the blockchain (EBSI) are fully EU-operated and EU-governed.
Sovereignty Profile
When to choose this variant: You need both the throughput efficiency of the hybrid model and the guarantee that every component - cloud, storage, and blockchain - is under EU legal jurisdiction. No data, metadata, or cryptographic proof leaves the EU at any stage.
The Complete Sovereignty Matrix - All Protocol Variants
Architecture
Which Records Go On-Chain vs. Off-Chain
The routing configuration follows the same logic as RKP-3 Standard and RKP-3 Enhanced EU. What changes is that on-chain records now land on EBSI instead of Polygon:
EBSI anchoring provides:
- EU-jurisdiction timestamp and integrity proof
- Verifiability by EU regulatory authorities and member state supervisors
- Native compatibility with EU Digital Identity Wallet (EUDIW) infrastructure
- Alignment with EU government and public sector digital infrastructure standards
Regulatory Frameworks Addressed
Target Organisations
Critical national infrastructure
Energy, water, transport, and digital infrastructure operators where EU sovereignty is a regulatory or national security requirement.
EU institutions and agencies
European Commission, Parliament, Council, and EU agencies subject to institutional data sovereignty policies.
Financial entities under DORA (highest risk)
Systemically important financial institutions where ICT infrastructure under US jurisdiction creates unacceptable concentration risk.
EUDIW credential issuers and verifiers
Trust service providers and public authorities participating in the EU Digital Identity Wallet ecosystem.
Healthcare and clinical research
EU hospitals, clinical research organisations, and pharmaceutical manufacturers with the strictest data residency requirements.
Classified and defence-adjacent
Organisations with classification obligations or operational requirements that prohibit non-EU infrastructure in the integrity pipeline.
Availability
RKP-3 Sovereign EU is available on request for organisations with demonstrated sovereignty requirements. Deployment involves:- Dedicated OVH tenancy for API processing and storage
- EBSI network configuration for on-chain anchoring
- EU-law-governed data processing and service agreement
- Sovereignty architecture review and documentation package for regulatory evidence