Vehicle Passport

Tesla Model 3 example

This example demonstrates how a vehicle is tracked through the Passport system. We follow a Tesla Model 3 from factory production through service events, annual inspection, a minor incident, and ultimately a custody transfer.

VIN Privacy

Note that the actual VIN is never stored directly. Instead, we store a hash of the VIN for verification purposes without exposing the full identifier.

Step 1: Passport Created

The vehicle receives a unique passport ID when registered in the system.

Passport Record

json

{
  "passportId": "psp_car_vin_2025_001",
  "assetType": "vehicle",
  "status": "active",
  "mintedAt": "2024-06-01T08:00:00Z"
}

Step 2: Attributes Bound

Core vehicle attributes including VIN hash, make, model, and specifications.

Make

Tesla

Model

Model 3

Year

2024

Color

Midnight Silver

Battery

82 kWh

VIN Hash

sha256:5a4b3c2d1e...

Bound Attributes

json

{
  "vinHash": "sha256:5a4b3c2d1e...",
  "make": "Tesla",
  "model": "Model 3",
  "year": 2024,
  "color": "Midnight Silver",
  "batteryCapacity": "82 kWh"
}

Event Timeline

The vehicle's complete service history, inspections, incidents, and transfers are recorded as append-only events.

provenance

6/1/2024, 8:01:00 AM

evt_001

Factory: tesla_fremont_001
Production Date: 2024-05-28
Initial Mileage: 12 mi

Raw Event Data

json

{
  "eventId": "evt_001",
  "eventType": "provenance",
  "timestamp": "2024-06-01T08:01:00Z",
  "data": {
    "factoryRef": "tesla_fremont_001",
    "productionDate": "2024-05-28",
    "initialMileage": 12
  }
}

service

12/15/2024, 10:00:00 AM

evt_002

Service Type: scheduled maintenance
Mileage: 12,450 mi
Service Center: service_node_tesla_sf
Notes: Tire rotation, brake inspection

Raw Event Data

json

{
  "eventId": "evt_002",
  "eventType": "service",
  "timestamp": "2024-12-15T10:00:00Z",
  "data": {
    "serviceType": "scheduled_maintenance",
    "mileage": 12450,
    "serviceCenter": "service_node_tesla_sf",
    "notes": "Tire rotation, brake inspection"
  }
}

verification

1/10/2025, 2:00:00 PM

evt_003

Inspection PassedVerifier Node

Type: annual safety
Result: pass
Mileage: 15,230 mi

Raw Event Data

json

{
  "eventId": "evt_003",
  "eventType": "verification",
  "timestamp": "2025-01-10T14:00:00Z",
  "verifier": {
    "nodeId": "verifier_inspection_ca",
    "type": "verifier_node"
  },
  "attestation": {
    "verified": true,
    "inspectionType": "annual_safety",
    "result": "pass",
    "mileage": 15230
  }
}

incidentaccident_history

1/18/2025, 4:30:00 PM

evt_004

Incident Recorded

Type: minor collision
Severity: low
Repaired: Yes
Insurance Ref: claim_ref_hidden

Raw Event Data

json

{
  "eventId": "evt_004",
  "eventType": "incident",
  "timestamp": "2025-01-18T16:30:00Z",
  "data": {
    "type": "minor_collision",
    "severity": "low",
    "repaired": true,
    "insuranceRef": "claim_ref_hidden"
  },
  "flag": "accident_history"
}

custody transfer

1/21/2025, 9:00:00 AM

evt_005

From:

owner_custody_001

To:

buyer_custody_002

Private sale completed

Raw Event Data

json

{
  "eventId": "evt_005",
  "eventType": "custody_transfer",
  "timestamp": "2025-01-21T09:00:00Z",
  "from": {
    "nodeRef": "owner_custody_001"
  },
  "to": {
    "nodeRef": "buyer_custody_002"
  },
  "notes": "Private sale completed"
}

Key Observations

Mileage Tracking

Each service and inspection event records the current mileage, creating a verifiable odometer history that cannot be tampered with.

Incident Transparency

The accident flag is permanently recorded but shows the incident was minor and repaired. This provides transparency without hiding history.

Privacy by Design

No personal information appears in this passport. The VIN is hashed. Insurance references are opaque. Custody transfers use node references only. A buyer can verify the vehicle's history without learning anything about previous owners.

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