The Carfax
for Modified Cars.
PROVEN gives car builders, buyers, and sellers a verified digital record of every modification, tune, and install — so you can buy and sell with total confidence.
2023 Subaru WRX STI
VIN: JF1VA2E64N9823401 · Owner: @ghost_builder
Modifications
24 logged
Verified Parts
19 / 24
Dyno Runs
3 on record
HP (verified)
412 whp
PROVEN Score
Build Credibility
Everything your build deserves.
PROVEN brings order to the chaos of modified car history — giving every build the documentation and credibility it deserves.
Full Modification History
Log every part, tune, install date, and shop. Build a complete, timestamped record from stock to current spec — nothing gets lost.
Verified Documentation
Third-party verification from shops, dyno sheets, and receipts. Every claim backed by evidence — not just a builder's word.
PROVEN Score
An at-a-glance credibility rating for every build — based on documentation completeness, part quality, and community verification.
Owner Profiles
Builders own their reputation. Profiles tied to every vehicle they've owned, modified, and sold — a permanent build portfolio.
Marketplace Trust Layer
When listing a modified car, attach your PROVEN profile. Buyers get instant confidence — sellers get faster, higher-value sales.
Community Credibility
Fellow enthusiasts and verified shops can vouch for builds. Real trust from real people who know their cars.
From build start to final sale — every step documented.
PROVEN works whether you're building, buying, or selling. Three simple steps to a verified build history that follows the car forever.
Claim your vehicle
Add your car by VIN. PROVEN creates a dedicated build profile — unique to that vehicle, forever.
Log your modifications
Add parts, dyno sheets, install receipts, and photos. Every entry is timestamped and immutable.
Get verified & share
Shops and the community verify your build. Share your PROVEN profile when listing for sale — buyers trust it.
Immutable Records
Once logged, modification records cannot be deleted — creating a permanent, trustworthy history.
VIN-Linked Profiles
Every build profile is tied to a VIN. The history stays with the car, not just the owner.
Shop Verification
Partnered shops can digitally sign off on installs and dyno results directly within PROVEN.
Resale Value Impact
Verified builds command higher prices. Buyers pay a premium for confidence and transparency.
Modified cars deserve better.
The modified car market is plagued by uncertainty. Buyers can't trust claimed specs. Builders lose credit for their work. PROVEN changes this.
Before PROVEN
Buyer has no way to verify modifications or mileage on engine work.
With PROVEN
Full modification timeline with receipts, dyno sheets, and shop sign-offs.
Before PROVEN
Sellers can't prove the value of expensive modifications to skeptical buyers.
With PROVEN
Share a verified PROVEN profile — every mod documented, every claim backed.
Before PROVEN
Builders spend years on a build with nothing to show outside of Instagram.
With PROVEN
A permanent, portable portfolio that follows every car you've ever built.
Be first to prove
your build.
Join thousands of car enthusiasts on the PROVEN waitlist. Early access members get priority onboarding, founding member badge, and lifetime discounts.