Trust Infrastructure
Institutional trust as a product
SOSNA Exchange is not a third-party listing marketplace. Every lot moves through a coordinated process of authentication, custody, insurance and verifiable history — managed exclusively by the SOSNA Trade Desk.
Provenance Ledger
Cryptographically chained, daily-anchored events for every lot — from intake to delivery.
Open →Authentication Process
Independent lab reports, certificate matching and on-site verification before any listing reaches the public catalog.
Open →Approved Vault Custody
Approved vault partners across the Miami, Prague and Dubai regions, with sealed condition reports. Custody insurance is arranged per lot under the agreed custody terms.
Open →Insurance Coverage
Specie and transit insurance available for approved vault custody and sanctioned movements. Scope is confirmed in writing per lot before custody or shipment begins.
Open →Dispute Coordination
Trade Desk-coordinated review with defined timelines, evidence requirements and a final operational decision — never direct buyer–seller conflict, never a legal ruling.
Open →Seven-Layer Guarantee
The full SOSNA institutional guarantee stack covering authenticity, certificate match, lab verification, custody, delivery and payout.
Open →Important notice
SOSNA Exchange is not an exchange, broker-dealer or investment platform.
Every interaction is mediated by the SOSNA Trade Desk — buyers and sellers never communicate directly. None of our guarantees constitute an investment, return or promise of appreciation.