The Provenance Vault is a permanent, blockchain-verified record of your car's complete history. Every owner. Every restoration. Every concours result. Every appraisal. You control who sees what — and the record travels with the car forever, adding verified value at every future sale.
A car with a complete Provenance Vault record commands a premium at auction. We estimate 8–15% above comparable undocumented examples. On a $500,000 car, that's $40,000–$75,000 in recovered value. On a $5,000,000 car, it's $400,000–$750,000.
Every owner. Every transfer. Every country. Documented and verified — so the next buyer knows exactly what they're inheriting. You control what's visible and to whom.
Each entry permanently minted to the blockchain. Immutable, tamper-proof, verifiable by anyone. The record travels with the car forever — long after you've sold it.
A car with a complete Provenance Vault record commands a premium at auction. We estimate 8–15% above comparable undocumented examples. On a $500K car, that's $40–75K recovered.
23,000+ premium auction records, all $100K+. HammerScore ratings derived from real transactions. Color premium data. Venue efficiency. VIN history with red flag analysis. The intelligence to know exactly what to bid — and when to walk away.
Get Early AccessEvery serious collector builds an extraordinary physical garage — the lighting, the lifts, the museum-quality display. HammerDown is the digital equivalent.
Your private space on HammerDown. Add your cars, upload photography, connect each one to its Vault record. Showcase what you choose to the community. Keep private what you want private.
Then step outside — and your cars can live in the Community Garages alongside every other serious collector who owns what you own.
Park your cars in the Community Garages alongside every collector worldwide who owns what you own. Every marque has a home. The most significant cars have their own address.
For cars with documented race history. Le Mans. Daytona. Sebring. The Nürburgring. If your car raced, it belongs here.
For cars that have competed at recognized concours d'elegance. Pebble Beach. Amelia Island. Villa d'Este. The standard of perfection.
127 cars. Every one changed hands for over $5 million. If your car is here, you already know what that means.
Members signal when they're considering selling — before the car ever goes to an auction house. Private. Discreet. Member-to-member.
The architecture makes it impossible to produce a list of "members with cars worth over $X in city Y" — even if someone tried. Your privacy is structural. HammerDown employees cannot access your Vault records without your explicit permission. Your data is encrypted with keys only you control.
"Built for people who require discretion."
Vault records encrypted with member-specific keys. HammerDown employees cannot access your records without your explicit permission.
Only a cryptographic fingerprint is minted on-chain — not your data. The blockchain proves authenticity without revealing anything.
Three visibility tiers: public signals only, members only, or owner-approved full access. You decide who sees what — and when.
Member identity is never co-located with collection value or location data. No one can query "who has a $10M collection in Scottsdale."
We review every application personally. If HammerDown is the right fit for your collection, we'll be in touch.
We review every application personally.
Leave your contact information and tell us about your collection. We review every request personally.
No spam. No pressure. We review every request personally.