Signatrust — Trust, verification & insurance layer for AI decisions
When an agent acts and no one can prove it<br>Three things that already happened. None had a receipt.
EU bank · Treasury · Q1 2026<br>A finance agent approved a €487,000 transfer at 02:14 . Six months later, when the auditor asked which policy applied and who reviewed the call, no one could prove a thing.
Decision logged. Decision unprovable.
Consumer credit · 2025 dispute<br>An AI denied a mortgage. The regulator gave the lender 14 days to produce the rationale. The system had logs — none of them signed, none of them tamper-evident, none of them admissible.
Records existed. Evidence didn't.
B2B SaaS · production incident<br>A DevOps agent modified production at 03:40 during a freeze window . Three teams pointed at each other. "The agent did it" satisfied no one — including the enterprise customer whose SLA was now broken.
Blame circulated. Accountability dissolved.
Anonymised industry patterns, not testimonials. Today, every one of these would have a signed, chain-linked Decision Receipt any auditor, regulator or counterparty can verify in seconds — without trusting the party who logged it.
signatrust.net / verify
Verified
STR-7F3A21C9D4
Decision Receipt · Ed25519 · spec v1.0
High risk
AgentFinanceBot<br>Modelopenai · gpt-4o · 2026.4<br>Decisionloan_rejection<br>Human reviewYes<br>Inputsha256:6718c8a836…abbcf768<br>Outputsha256:8a3466a5e7…8882c42a<br>Policies<br>eu-ai-act-high-riskinternal-credit-v3
Ed25519 signature<br>fj9FpBMPgPdEBlkZ44OsSaHo350+h1MengjAANyrLoKXPv5VBI+uXN8UI+hD8MIWHbL8LZhYVK2veA+O3GDSCw==
Audit trail
Decision captured2026-06-07T10:00:00Z
Input & output fingerprintedSHA-256 · on your side
Receipt canonicalized & hashedledger seq #42
Signed with node keyed25519
Linked to previous receipttamper-evident
70/100<br>Agent Trust Score · B
The trust chain<br>One spine. Three layers. From a single decision to insurable AI risk.
Most tools cover one slice — logging, or auditing, or insurance in isolation. Signatrust runs the whole chain on a single evidence base, so every layer above is derived from real receipts, not self-attested claims.
01<br>Decision
An agent, model or workflow takes a real action — approve a loan, execute a payment, sign a contract, ship a deploy.
Try the live demo →
02<br>Receipt
The decision is sealed into a signed, chained Decision Receipt : who acted, when, under which permissions, with which model — Ed25519-signed.
See a real receipt →
03<br>Verification
The receipt is independently checkable by auditors, AI-vs-AI review, knowledge rules, or human experts — no access to your systems needed.
Verify a receipt →
04<br>Trust Score
Verified history becomes an Agent Trust Score (0–100) — integrity, oversight, governance, longevity — recomputable from receipts alone.
Open a Trust Passport →
05<br>Risk Score
Aggregated across an organization's agents: exposure by risk level, control strength, insurability grade and a relative underwriting index.
Open a risk profile →
06<br>Insurance
Insurers price AI liability cover on real evidence instead of guesses — the same way credit and motor insurance are priced today.
Enter the insurer portal →
Decision → Receipt → Verification → Trust Score → Risk Score → Insurance. Each layer is independently checkable. Nothing is self-attested.
The Signatrust platform<br>One proof engine. A family of products on top.
Every Signatrust product is a different surface on the same append-only, Ed25519-signed ledger. New verticals plug in without forking the trust model — so Trust Scores, compliance and risk profiles stay consistent across humans, agents and automated systems.
Signatrust Sign Live
Documents & approvals
Sign or approve a document with zero custody — the file is hashed in your browser, only the hash is stored, each signature is a verifiable receipt.
Open Signatrust Sign →
Signatrust Agents Live
Agent identity & permissions
Register an AI agent, declare its model and permissions, manage API keys and policies. Every action it takes can be sealed and audited.
Register an agent →
Signatrust Receipts Live
Decision Receipts & ledger
The signing engine: canonical bodies, Ed25519 signatures, an append-only chain and an open receipt spec any vendor can implement.
See a real receipt →
Signatrust Verify Live
Independent verification & experts
Anyone can re-check a receipt with no access to your systems. A network of human experts can countersign high-risk decisions.
Verify a receipt →
Signatrust Passport Live
Trust Score & reputation
A 0–100 reputation per agent, recomputable from receipts alone — integrity, oversight on risky calls, governance, longevity.
Open a Trust Passport →
Signatrust Risk Live
Risk profile & insurance
Exposure, control strength, insurability grade and a relative underwriting index. The insurer portal sits on top.
Open a risk profile →
Built to support your obligations under
EU AI Act<br>NIST AI RMF<br>ISO/IEC 42001<br>SOC 2<br>GDPR
The accountability gap<br>What...