DOCUMENT INTAKE
Collect the document and signer context through API or upload flow, then hash it immediately to create a tamper-evident fingerprint.
Zero-Knowledge Verification Engine
Zero-Knowledge Document Verification for High-Stakes Transactions
TrustSignal prevents deed, license, and credential fraud before records are finalized by issuing cryptographic proofs in ~1.5 seconds.
Enterprise Platform
01 / What It Does
WHAT TRUSTSIGNAL DOES
Zero-Knowledge Verification for High-Stakes Transactions
TrustSignal is a zero-knowledge document verification engine for high-stakes transactions.
It prevents deed, license, and credential fraud before they are recorded by issuing cryptographic proofs in ~1.5 seconds.
How It Works
- 1Ingests a document or record
- 2Generates a zero-knowledge proof and anchors it on chain
- 3Returns a verification receipt your systems can trust
02 / Principles
CORE TENETS
ZERO-KNOWLEDGE PROOF
Generate proof that the document and policy checks passed without exposing personal data, raw documents, or model internals.
BLOCKCHAIN ANCHOR
Anchor proof commitments on Solana using Anchor programs so every verification has an immutable on-chain checkpoint.
VERIFICATION RECEIPT
Issue a cryptographic receipt with timestamp, policy outcome, and proof reference so auditors can re-verify independently.
03 / Architecture
SYSTEM COMPONENTS
How the engine runs under the hood across proof generation, risk scoring, revocation, and integration.
ZK Core
Halo2 Circuits
Revocable non-membership proofs built on halo2_proofs 0.3. Merkle-based exclusion proofs verify authorization without revealing identity.
Fraud Detection
ZKML Oracle
Verifiable AI fraud scoring via ezkl. AUC 0.998 with ~1.5s proof generation.
Revocation
Poseidon Nullifiers
Dynamic credential revocation using Poseidon hash-based nullifiers. Invalidates compromised credentials without re-issuing every proof.
On-Chain
EVM Anchor
Proof commitments anchored on Polygon testnet for deed recording and credential-chain attestations.
Integration
REST API
Fastify v5 + Prisma endpoints for verify, revoke, and status checks in enterprise verification flows.
Developer Kit
TypeScript SDK
Zero-dependency SDK for integrating verification receipts into Node.js and browser systems.
04 / Problem & Versatility
WHERE FRAUD IS ACCELERATING
Select a sector to compare fraud pressure and how TrustSignal intercepts it before records are finalized.
Property Deed Fraud
The Problem
Real estate wire fraud and deed-record manipulation continue to create large losses in closing workflows.
FBI IC3 reported $173.6M in real-estate fraud losses in 2024, after a spike to $396.9M in 2022.
How TrustSignal Prevents It
- Anchors deed records with cryptographic proofs before recording.
- Makes tampering or substitution detectable after closing.
- Issues verification receipts for title insurers, lenders, and regulators.
- Supports revocation checks when a deed packet is later disputed.
By The Numbers
$397M
Peak — 2022
IC3 reported losses (USD)
$174M reported in 2024
$221M2019
$213M2020
$350M2021
$397M2022
$145M2023
$174M2024
05 / Changelog
LATEST PROOFS
06 / Colophon
TECHNICAL STACK
Proof Layer
- halo2_proofs 0.3
- Poseidon Hash
- ezkl (ZKML)
API Layer
- TypeScript
- Fastify v5
- Prisma ORM
- REST + Webhooks
Anchor Layer
- Solana
- Anchor Program
- Immutable Receipts
Benchmarks
- 1.5s Proof Generation
- Trust Verification in Real Time
- 99.34% Coverage
- 64 Tests
Imagery
- /public/images/property-deed-flow.png
- /public/images/zk-proof-receipt.png
- /public/images/verification-dashboard.png
Data Sources
- FBI IC3 2024
- FTC 2024 Data
- FinCEN FY2024
- OECD-EUIPO 2025
Ready to eliminate verification fraud?
Request API access: contact@trustsignal.dev