Technical Architecture

Built for the Worst Moments.
Engineered for the Best Outcomes.

A permissioned blockchain, offline-first caching, and real-time clinical intelligence, designed from day one for emergency medicine.

Access Control

Role-Based Access Control

Not everyone needs to see everything. VitalChain's granular RBAC system ensures that each responder type, from EMT-Basic to Critical Care Paramedic, sees exactly the data appropriate for their role and certification level.

  • 14 distinct responder types including paramedic, firefighter, law enforcement, and coast guard
  • 4 access tiers: Low, Medium, High, and Emergency Override
  • Emergency override for life-threatening scenarios with full audit trail
  • NPI verification via CMS NPPES Registry for provider credentialing
Override Critical Care Paramedic, ER Physician
High Paramedic, Flight Medic
Medium AEMT, Firefighter/EMT
Low EMT-Basic, Law Enforcement
Connectivity

Offline-First Architecture

Emergencies don't wait for internet. VitalChain's offline-first architecture ensures critical patient data is always available, regardless of network connectivity; a capability unique in the emergency medical records space.

  • AES-256 encrypted local cache on responder devices
  • Priority-based eviction ensures emergency-critical data is cached longest
  • Automatic sync reconciliation when connectivity is restored
  • Hash-based offline credential verification

NO SIGNAL? NO PROBLEM.
AES-256 · LOCAL CACHE · AUTO-SYNC

Safety

Clinical Decision Support

VitalChain's integrated CDSS engine provides real-time safety alerts that help responders avoid potentially dangerous clinical decisions during the most critical moments.

  • Drug-allergy conflict detection with critical safety gates
  • Drug-drug interaction warnings
  • Chronic condition alerts and critical care notes
  • Real-time clinical charting with write-back to blockchain

DRUG-ALLERGY · INTERACTIONS · CONDITIONS
The safety net between decision and outcome.

Interoperability

EHR Integration via HL7 FHIR R4 and SMART Backend Services

VitalChain implements the authentication pattern Epic, Cerner, and Athena require for production EHR integration: SMART on FHIR Backend Services with RS256 asymmetric client assertions. Our outbound flow is verified end-to-end against the SMART App Launcher, and we have probed the Cerner open sandbox against real patient records.

  • SMART on FHIR Backend Services, the server-to-server pattern major EHRs require (no shared secrets)
  • Public JWKS at /.well-known/jwks.json on every deployment; RS256 client assertions with kid header
  • End-to-end flow verified against the SMART App Launcher (2026-04-17)
  • Conflict detection and resolution for bidirectional data flow
  • HMAC-SHA256 signed webhook notifications for sync events
  • Confidence-based record matching and deduplication across multiple sources
  • Vendor-quirk-aware mappers (MedicationRequest, non-standard criticality values, minimal-field Patient.contact)

HL7 FHIR R4 · SMART Backend Services
RS256 client assertion · Public JWKS

Compliance

Security & Compliance

VitalChain is built on Hyperledger Fabric, a permissioned blockchain that provides an immutable, tamper-proof audit trail for every data access event. Every interaction is logged forever.

  • Hyperledger Fabric 2.5 permissioned blockchain
  • Multi-provider authentication: SSO, CAC/PIV, FIDO2, SAML, OAuth2
  • HIPAA-compliant audit trail with accessor ID, role, and timestamp
  • Real-time anomaly detection for suspicious access patterns

IMMUTABLE · AUDITABLE · COMPLIANT
Hyperledger Fabric 2.5

Patient Identification

Biometric Verification

In emergencies, knowing exactly who you're treating is as critical as knowing what to treat. VitalChain's multi-modal biometric system provides positive patient identification even when patients can't identify themselves.

  • Multi-modal biometric identification: fingerprint, facial recognition, and iris scanning
  • Identify unconscious or unresponsive patients via pre-enrolled biometrics
  • Confidence-based matching with automatic record reconciliation
  • Eliminates misidentification in mass casualty and multi-patient events
  • Foreign-visitor passport scanning creates temporary emergency profiles with identity verification for travelers without U.S. medical records

FINGERPRINT · FACIAL · IRIS
Know who you're treating.

Portable Data

EMS Cards: Encrypted Patient Data Cards

Critical medical information shouldn't depend on cell towers or Wi-Fi. VitalChain EMS Cards put essential patient data in a portable, encrypted format that works anywhere, from urban streets to remote wilderness.

  • AES-256 encrypted physical and digital cards carrying critical patient data
  • Works in fully disconnected, austere, and disaster environments
  • Contains allergies, medications, conditions, emergency contacts, and advance directives
  • Scannable by any VitalChain-equipped responder device

AES-256 · PORTABLE · OFFLINE
Critical data in their pocket.

Mass Casualty

Mass Casualty Triage Mode

When a mass casualty incident overwhelms standard workflows, VitalChain shifts into a dedicated triage mode designed for rapid intake, classification, and tracking across dozens or hundreds of patients simultaneously.

  • Rapid patient intake with streamlined registration during mass casualty incidents
  • START/JumpSTART triage classification and real-time patient tracking
  • Integrates with biometric identification for rapid patient matching
  • Team coordination and patient tracking across multiple responder units

INTAKE · CLASSIFY · TRACK
Built for the worst-case scenario.

Field Operations

Mobile Application

VitalChain's mobile app was designed for the realities of field operations, not desk work. Every interaction is optimized for speed, gloved hands, bright sunlight, and unreliable connectivity.

  • Field-optimized interface with touch targets sized for gloved hands
  • Offline-first architecture with automatic sync on reconnection
  • Mass casualty triage mode with rapid intake and classification
  • Push notifications for team coordination and patient status updates

OFFLINE · GLOVE-READY · FIELD-TESTED
Built for gloves and chaos.

See the Architecture in Action

Deploy VitalChain with your agency for 90 days. No cost, no commitment. See how it performs in the field.

Apply for Pilot Program Book a Demo