Architecture

Four layers.
One atomic outcome.

Layer 1 Settlement Engine Atomic multi-leg commit across custody platforms and chains.
Layer 2 Compliance Rail Evaluated before any commit executes.
Layer 3 Cross-chain Messaging Settlement instructions pass across networks. Assets stay on their native chain. No bridging, no wrapping.
Layer 4 API + SDK Surface REST API, typed SDKs, and a simulation environment on testnet.
Entity Diligence
World-Check Verify reads counterparty sanctions status and KYC standing from the committing platform at settlement time.
Address Screening
On-chain address risk classification before any transfer is committed to the ledger.
Oracle & Pricing
Tamper-resistant price feeds and cross-chain data for collateral valuation and DvP matching.
Cross-chain Messaging
Secure message passing across EVM and non-EVM networks. No bridge custody risk.
For Platforms

One integration.
Every counterparty.

Settle with any institution on any platform. Each integration expands counterparty reach and value for all participants.

Interbank settlement didn't cost banks their customers.
It gave them counterparties.

Network Counterparty reach Settlement reach grows with every participant that joins. Early integrators establish the counterparty relationships that define the network, and hold the most connected positions as it scales.
Execution Settlement Settlement happens in the background: atomic, cross-platform, in seconds.
Integration API-native Days to integrate. No infrastructure changes. No licensing fees.
Compliance

Nothing commits unless it clears.
Each layer covers what the others don't.

Identity
Available
Entity-level KYC and sanctions screening wired directly into the settlement gate. Counterparties are validated before commit.
Address Risk
Available
Real-time on-chain address classification. High-risk wallets are blocked at protocol level before any transfer is signed.
Pricing
Available
Tamper-resistant price feeds for collateral valuation. DvP ratios are oracle-verified at settlement time, not derived from off-chain inputs.

Neutral settlement infrastructure.

KEYSTONE · OS

References to third-party names and trademarks reflect active commercial relationships with integration partners and service providers. KeyStone OS operates as independent, neutral infrastructure. © 2026 KeyStone OS.