AURA · EXCHANGE
Anonymous is for the buyer. Verified is for you.
The first and only technology that proves TWO SPECIFIC LIVING HUMANS were within arm's reach at a specific place at a specific moment — UWB-locked, biometrically dual-signed, cryptographically tamper-evident. Built for the $50K watch, the $30K ring, the $200K car, and every meetup where anonymity is the seller's risk and not the buyer's.
First sealed meetup free. Then $24.99 per seal, or $14.99/mo unlimited. Cancel anytime.
★ The Patek that came back as a brass replica
“Buyer flew in from out-of-state. We met at a Beverly Hills hotel lobby. He asked to inspect the watch for two minutes, walked to the bathroom, and came back with what looked like the same Patek 5711. I accepted his cashier's check, watched him leave. Three days later my bank flagged the check as a forgery and a jeweler confirmed the watch he returned was a $400 brass replica. I had no record of who he actually was. The hotel cameras showed a guy in a baseball cap. The police closed the case in 11 days.”
— Luxury watch reseller · Los Angeles · $158,000 loss · case never solved, 2025
What Goes Wrong
Buyers have escrow. Sellers have a coffee-shop meetup.
Armed Robbery
You meet a “buyer” at a hotel. He pulls a firearm at the handoff. You hand over a $50K watch and a vague description. Police close the case in weeks.
Swap & Scam
Buyer inspects the item, walks away, and returns with a near-perfect counterfeit. You accept “payment” — a forged cashier's check — and discover the loss days later. No proof of who actually held your goods.
Identity Ghosting
Marketplace ID verification confirmed a name. The buyer who showed up was someone else entirely — a confederate. You can't prove the verified buyer was ever there. The platform's verification is useless to you.
How It Works
Both Tap to Meet
When you and the buyer are within arm's reach, both tap to start the seal. Aura confirms via UWB that you're physically together — not in the parking lot, not via a confederate.
8-Second Co-Witness
Aura captures six biological signals from each of you while UWB, BLE, and location triangulation lock in proximity. Spoof rigs fail; remote attacks fail; a confederate holding the buyer's phone fails.
Both Tap to Close
Goods exchange hands. Both tap to seal. The receipt — dual-signed by both Secure Enclaves — exports as a court-admissible PDF + forensic JSON.
The Four-Signal Proof
No one else can do this. Not even close.
Every Aura seal is the simultaneous agreement of four independent verification signals. A forger has to defeat Apple's silicon, Apple's attestation, human physiology, and three independent public infrastructures — at the same instant, at the same location. The math doesn't permit it.
Ultra-Wideband proximity.
±10 centimeters · Apple U1 / U2 chip
The same chip Apple uses for AirTag precision finding. Aura measures the exact distance between your iPhone and the buyer's to within a hand's width. They can't seal from across the parking lot, can't seal from inside a car, can't seal from a confederate down the street. If they're not literally close enough to shake your hand, the seal fails.
Continuous co-presence stream.
8-second cryptographic handshake · BLE 5.x
Bluetooth Low Energy runs a continuous stream of signed “I see you” packets for the entire 8-second seal window. If the buyer steps away, swaps phones, or another device tries to spoof into the channel, the stream breaks and the seal aborts. No moment-in-time forgery can survive an 8-second continuous handshake.
Living-tissue verification.
Six biological signals · phase-coherent
Aura captures the buyer's heart rhythm, micro-tremor, breathing, thermal contact, vocal harmonics, and gait — all six simultaneously, all six in coherent physiological phase. A photo fails. A deepfake fails. A silicone stand-in fails. A confederate holding the buyer's phone fails because their biometrics don't match the enrolled buyer's template.
Triangulated geographic witness.
GPS + cell-tower + WiFi BSSID fingerprint
The seal locks in your exact location through three independent channels: GPS (10m accuracy), cell-tower ID (requires real cellular hardware), and the visible WiFi access-point fingerprint of the room you're in. Spoofing requires fooling three independent public infrastructures simultaneously — Apple's network, your carrier's tower grid, and the WiFi BSSID registry.
The Coherence Lock
“All four must agree. If they don't, the seal fails on the first byte.”
Each signal has different attack surfaces. UWB, BLE, biometrics, location — each individually defeatable by a determined and well-resourced attacker. But an attacker who can compromise all four simultaneously, at the same place, at the same instant, could rob a bank vault with less effort.
First And Only
Nothing else even attempts this.
| Capability | Marketplace ID Verification | Dashcam / Body Cam | Escrow.com | "Safe Trade Spot" | AURA |
|---|---|---|---|---|---|
| Verifies the buyer's identity | ✓ | — | ✓ | — | ✓ |
| Proves they were physically there | — | ✓ | — | — | ✓ |
| Proves arm's-reach proximity | — | — | — | — | ✓ |
| Proves it was the verified person, not a stand-in | — | — | — | — | ✓ |
| Tamper-evident under court audit | — | — | ✓ | — | ✓ |
| Works on hot luxury items (<1hr sales) | ✓ | ✓ | — | ✓ | ✓ |
| FRE 902(13) self-authenticating | — | — | — | — | ✓ |
| Your data stays on YOUR device | — | ✓ | — | — | ✓ |
Built For
Every meetup worth $5,000.
Luxury Watches
Rolex, Patek, AP, Richard Mille
Fine Jewelry
Engagement rings, estate pieces
Designer Bags
Hermès, Chanel, Goyard
Classic Cars
Bring-a-Trailer, private sales
Fine Wine
Auction-grade, private cellar
Art & Antiques
Provenance handovers
Collectible Cards
PSA-graded, vintage sports
Firearms
Legal P2P transfer documentation
The Fortress Behind Every Seal
Built like Apple Pay.
Engineered for the moment a buyer flips.
Secure Enclave Lock
Same chip that protects your Face ID and Apple Pay.
Your seal's signing keys are generated inside your iPhone's Secure Enclave — a physically isolated chip that even Apple can't read out. The keys never touch the internet, never leave your phone, and can't be extracted even if your phone is jailbroken.
Dual-Chain of Custody
Both Secure Enclaves sign. Both Face IDs witness.
Every seal is signed by both your phone AND the buyer's — two independent hardware roots-of-trust. Neither party can later claim the meetup didn't happen. The buyer who tries to deny it has to argue that both Apple chips were compromised at the same instant.
On-Device Primacy
Aura doesn't have your data. Nobody can subpoena what we don't have.
Your seals live on YOUR phone, encrypted with keys only your Face ID can release. Aura's servers literally do not have the keys. A subpoena to Aura extracts nothing because we have nothing. A breach of Aura's servers extracts nothing because we have nothing.
Hash-Chained Receipts
Editing any frame of any seal breaks the chain instantly.
Every seal is linked backward to the previous seal via a cryptographic hash. Tampering with a single byte changes the hash, which breaks the chain, which is mathematically detectable to any reviewer with the public key. Plaintiff's counsel can't argue you back-dated entries.
Zero-Knowledge Export
Prove what they need. Reveal nothing more.
When you send a seal to a buyer's bank, an insurance carrier, or opposing counsel, they see what they need — “these two parties were within arm's reach at this address at this moment” — but never your raw biometrics, never your other transactions, never your pattern of life. Cryptographic proof, not blanket discovery.
FRE 902(13) Self-Authentication
Admitted into court without your testimony about how it works.
Aura seals satisfy Federal Rule of Evidence 902(13) — “certified records generated by an electronic process” — so a seal can be entered as evidence in mediation, arbitration, or civil court without you having to testify about how the technology works. Your seal authenticates itself.
Pricing
Pay per seal. Or seal everything for $14.99.
Per-Seal · One-Off
per sealed meetup · no subscription
- ✓One court-admissible seal
- ✓Dual-biometric proof of presence
- ✓UWB proximity + BLE co-presence lock
- ✓PDF + forensic JSON export
- ✓First seal is on us — try before you buy
Aura Exchange · 30 Days Free
per month · unlimited sealed meetups
- ✓Unlimited sealed meetups, any vertical
- ✓Brokerage-style ledger of every transaction
- ✓Marketplace partner integrations (Chrono24, BaT, Fashionphile)
- ✓Insurance carrier export templates (USAA, Chubb, Hodinkee)
- ✓Defense Pack — compiled artifact for civil suits
- ✓Multi-party seals (broker + buyer + seller)
Why You Can Trust It
If you trust Apple Pay with $10,000, you can trust Aura with $50,000.
Apple Pay proves the buyer authorized a purchase
Aura proves the buyer was at the handover
AirTag uses UWB to find within centimeters
Same UWB confirms the buyer is in arm's reach
Secure Enclave locks your banking app
Same chip signs every Aura seal
App Attest blocks fake banking apps
Same layer blocks fake Aura seals
FAQ
What about…
The watch is worth $50,000. The seal is $24.99.
First seal free. $24.99 per seal or $14.99/month unlimited.