Prove what your AI did.
Sentinel records every AI interaction it governs as tamper-evident evidence, timestamped by independent authorities and verifiable without trusting OAIS. It works across Amazon Bedrock, Azure OpenAI, Google Vertex AI, Cohere and self-hosted models.
What Is OAIS?
OAIS (Optimized Artificial Intelligence Systems Inc.) is a Canadian company that builds AI sovereignty infrastructure for regulated enterprises. Founded by Daniel Fruman, OAIS provides two products — Sentinel Core and Sentinel Guard — that capture, block, govern, and optimise the AI interactions an organisation routes through them, creating a cryptographic chain of custody that is independently verifiable.
OAIS serves financial institutions, insurers, and other regulated enterprises preparing for OSFI E-23 (mandatory May 2027), the EU AI Act, and ISO 42001 compliance. Sentinel Core sends OAIS cryptographic fingerprints and metadata, not the content of your AI interactions. Sentinel integrates with Amazon Bedrock, Microsoft Azure OpenAI, Google Cloud Vertex AI and Cohere, and connects other models, including self-hosted ones, through its reverse proxy.
Two Products. One Chain.
Sentinel Core captures and anchors the AI interactions you route through it. Sentinel Guard intercepts them at the browser. Together, they form a cryptographic chain of custody across your organisation's governed AI interactions.
Sentinel Core
Independently Verifiable AI Ledger · Multi-Cloud & SovereignOne line of code. SDK wrappers for Amazon Bedrock, Microsoft Azure OpenAI, Google Cloud Vertex AI and Cohere, and a reverse proxy for other models. Every AI interaction is HMAC-hashed with a key only you hold, Ed25519-signed at capture, Merkle-anchored (RFC 6962-style), and timestamped by an independent RFC 3161 authority. OAIS sees the cryptographic fingerprint. Never your plaintext data.
HMAC-SHA3-256 Hashing
Content hashed with a tenant key that OAIS never holds. Inputs and outputs become irreversible fingerprints.
Ed25519 Signing
Each record is signed by the client agent. Tamper-evident from the moment of capture.
RFC 6962-style Merkle Anchoring
Records are batched into Merkle trees. Any single change invalidates the entire chain above it.
RFC 3161 Timestamping
An independent timestamp authority proves records existed at a specific time. No OAIS infrastructure access required to verify.
Any third party can verify the entire chain with a standalone script. No OAIS account, no API access, no trust required.
Sentinel Guard
Browser Extension for Shadow AI Detection & DLPDeployed via Chrome Enterprise Policy or Intune. Sentinel Guard detects AI tool usage across Chrome and Edge, and enforces DLP rules before data leaves the browser. Policy checks run in the browser or against an evaluation service you configure.
From AI Interaction to Verifiable Proof in Four Steps
When an employee interacts with any AI system, Sentinel captures that interaction and produces a tamper-evident, independently verifiable record. Here is exactly how the process works.
Interaction Capture
Sentinel Core intercepts the AI interaction at the API layer, inside your environment. The raw content is processed locally and is not sent to OAIS.
Cryptographic Hashing
The interaction content is hashed using HMAC-SHA3-256 with a key held exclusively by the client. The result is a fixed-length fingerprint. OAIS receives this fingerprint. It cannot reverse the hash to recover the original content, so the content never leaves your control.
Signing and Anchoring
The fingerprint is signed with an Ed25519 key (proving who created the record), then batched into a Merkle tree (RFC 6962-style, SHA3-256; not RFC 6962-interoperable). Any modification to any record in the batch invalidates the tree root. The Merkle root is then submitted to an independent RFC 3161 timestamp authority, proving the batch existed at a specific time.
Independent Verification
Any third party — a regulator, auditor, or internal compliance team — can verify the entire chain using a standalone verification script. No OAIS account is required. No API access is needed. The proof is mathematical, not institutional.
The result: a tamper-evident, independently timestamped chain of custody across the AI interactions Sentinel governs. If capture is ever interrupted, the system records a cryptographically signed gap attestation rather than leaving a silent hole — evidence fails closed while operations fail open, so you can always tell a network blip from tampering. Every record is verifiable without trusting OAIS. This is what separates independent audit custody from platform governance logging.
One Governance Plane.
Every Cloud & On-Premises Stack.
Sentinel is vendor-neutral. Teams on cloud AI services connect through SDK wrappers that stand in for the client they already use; other models, including private and on-premises ones, connect through a reverse proxy.
Amazon Web Services
SDK wrapper for Amazon Bedrock. Procure directly via AWS Marketplace Private Offers to draw down existing EDP commitments (Product Code: 6nguei3sp0crq9xj0bij6yn1i).
Microsoft Azure
Drop-in wrapper for Azure OpenAI Service (GPT-4o, o1). Runs inside your own Azure tenancy, including Canada Central and Canada East, and produces the same signed, timestamped records.
Google Cloud
Full-stream governance for Vertex AI and Gemini foundation models. Provides keyed hashing at the point of capture and tamper-evident Merkle ledger anchoring.
Private & Sovereign AI
SDK wrapper for Cohere (Command R/R+). Self-hosted and other models connect through a language-agnostic reverse proxy that runs in your environment.
We are not here to make the
Large Liability Model more powerful.
We are here to make you sovereign over it.
Capture
Every AI interaction, in and out, hashed with a key only the client holds. OAIS sees the fingerprint, never the content.
Block
DLP enforcement at the browser and API layer. Stop what you don't want leaving before it leaves.
Govern
AI output that triggers autonomous action passes through a deterministic governance gate before it executes.
Optimise
The audit chain is data. Use it to optimise tokenomics, fine-tune models, build proprietary datasets, demonstrate ROI, streamline workflows.
The Audit Chain Is Data
Once your AI interactions are captured cryptographically by Sentinel Core, new capabilities emerge that were previously impossible.
Regulatory Evidence on Demand
OSFI E-23, EU AI Act, ISO 42001. Export a verifiable, timestamped chain for any audit window in seconds.
Shadow AI Discovery
Surface AI tool usage on managed Chrome and Edge browsers where Sentinel Guard is deployed — visibility across your governed fleet before a regulator asks.
Proprietary AI Datasets
Your interaction data, structured and labelled. Build proprietary datasets for fine-tuning and competitive advantage.
Token Optimisation
Cost per outcome, not cost per call. See which interactions produce value and which waste tokens.
Governed Autonomous Agents
AI that acts within your boundaries. Deterministic governance gates that check an action before it executes.
Workflow Streamlining
Audit chain insights reveal bottlenecks, redundant interactions, and optimisation opportunities across your AI-augmented workflows.
Platform Governance Logs vs.
Independent Audit Custody
Most AI platforms offer built-in usage logs. These logs record what happened. They cannot prove the log is true. This distinction is critical for regulatory compliance.
Platform Governance Logging
OAIS Sentinel — Independent Audit Custody
For a detailed analysis, read: Your AI Platform Logs What Happened. It Cannot Prove the Log Is True. — by Daniel Fruman, May 2026.
Tailored to Your Environment
Every deployment is different. Pricing is scoped to your systems, data volume, integration requirements, and compliance objectives.
30 days. One AI system. Full Sentinel Core functionality with dedicated onboarding. We’ll define scope, integration approach, and success criteria together.
- Full Sentinel Core functionality
- Cryptographic chain of custody
- RFC 3161 timestamping
- Independent verification
- Dedicated onboarding support
Priced by the number of AI systems monitored, interaction volume, and integration complexity. Includes platform licensing, implementation, and ongoing support. Consulting and advisory services available.
- Full compliance-grade audit trail
- Cryptographic chain of custody with RFC 3161
- Real-time and batch integration options
- OSFI-aligned governance reporting
Per-seat licensing for Chrome and Edge. Volume-based pricing scaled to your organization. Annual and multi-year options available.
- Shadow AI discovery
- DLP enforcement
- Chrome Enterprise / Intune deployment
- Chrome and Edge coverage
Universal Multi-Cloud Deployment & Procurement: Deployable across AWS, Microsoft Azure, Google Cloud, and On-Premises environments. Enterprise agreements can be licensed directly or transacted via AWS Marketplace Private Offers to draw down existing cloud commitments (Product Code: 6nguei3sp0crq9xj0bij6yn1i).
Every engagement starts with a scoping conversation. No commitment required.
Built by Practitioners,
Not Observers
Daniel Fruman
Designed and built the Sentinel architecture. Over a decade of hands-on experience in healthcare privacy compliance and data governance, building and enforcing governance systems in regulated Canadian environments. Specialises in cryptographic audit systems, AI risk management, and regulatory compliance (OSFI E-23, EU AI Act, ISO 42001).
Founding Team
Three co-founders with senior experience spanning institutional investment management, insurance operations, and financial services. Combined expertise in enterprise governance, regulatory compliance, actuarial science, and risk modelling — drawn directly from the industries Sentinel is built to serve.
Built in 25 Sheppard Avenue West, Suite 300, Toronto, Ontario M2N 6S6, Canada. Focused on OSFI E-23. Serving regulated enterprises globally.
Contact us: info@oais.ai | Learn more about OAIS | Privacy Policy | LinkedIn
Published Analysis
OAIS publishes technical analysis on AI governance, regulatory compliance, and audit independence for regulated enterprises.
Your AI Platform Logs What Happened. It Cannot Prove the Log Is True.
Why AI platform governance logging is structurally insufficient for regulatory audit purposes. Covers OSFI E-23 requirements for independent audit custody and the architectural distinction between governed AI infrastructure and independent cryptographic verification.
Read the full analysis →Frequently Asked Questions
What is OAIS?
OAIS (Optimized Artificial Intelligence Systems Inc.) builds AI sovereignty infrastructure for regulated enterprises. Its two products — Sentinel Core and Sentinel Guard — capture, block, govern, and optimise the AI interactions an organisation routes through them, creating a cryptographic chain of custody that is independently verifiable.
What is Sentinel Core?
Sentinel Core is a cryptographic AI interaction registry. With one line of code, every AI interaction is HMAC-hashed with a key only the client holds, Ed25519-signed, Merkle-anchored (RFC 6962-style), and timestamped by an independent RFC 3161 authority. OAIS sees the fingerprint, never the content. Any third party can verify the entire chain without an OAIS account.
What is Sentinel Guard?
Sentinel Guard is a browser extension for shadow AI detection and data loss prevention. Deployed via Chrome Enterprise Policy or Intune, it detects AI tool usage across Chrome and Edge, and enforces DLP rules before data leaves the browser. Policy checks run in the browser or against an evaluation service the organisation configures. Integration with the Sentinel Core registry is in development.
How does OAIS help with OSFI E-23 compliance?
OSFI E-23, effective May 2027, requires enterprise-wide AI model risk management for all federally regulated Canadian financial institutions. Sentinel Core and Sentinel Guard produce the cryptographic audit evidence used to demonstrate control over AI interactions — tamper-evident records, independent timestamps, and exportable reports for any audit window. OAIS provides the auditability; the compliance determination remains with the institution and its auditors.
Does OAIS see my data?
No. Sentinel Core hashes content with an HMAC key that only the client holds. OAIS sees the cryptographic fingerprint — never the content itself. Sentinel Guard sends prompt text only to the policy evaluation service the organisation configures. The chain can be verified by a third party with OAIS’s standalone verifier, without access to OAIS infrastructure.
What compliance frameworks does OAIS support?
OAIS supports OSFI E-23 (mandatory May 2027 for Canadian federally regulated financial institutions), the EU AI Act (mandatory for AI systems in regulated European contexts), and ISO 42001 (the international standard for AI management systems). Sentinel provides the cryptographic auditability these frameworks require.
How is Sentinel Guard deployed?
Sentinel Guard is deployed via Chrome Enterprise Policy or Microsoft Intune. It runs as a browser extension on Chrome and Edge, requiring no changes to existing AI tools or workflows. It detects AI usage and enforces DLP rules at the browser layer.
What does OAIS pricing look like?
Pricing is scoped to each deployment: number of AI systems monitored, interaction volume, integration complexity, and compliance objectives. Sentinel Core uses custom platform licensing. Sentinel Guard uses per-seat licensing with volume-based pricing. A 30-day pilot program is available. Every engagement starts with a scoping conversation.
How long does it take to deploy Sentinel Core?
Sentinel Core integrates with one line of code. The initial deployment — connecting one AI system and producing the first cryptographic audit record — can be completed in hours. A full enterprise rollout, covering multiple AI systems, configuring governance rules, and establishing compliance reporting, is typically scoped during a 30-day pilot engagement.
How does independent verification work?
OAIS provides a standalone verification script that any third party can run — a regulator, external auditor, or internal compliance team. The script recalculates HMAC hashes, validates Ed25519 signatures, reconstructs the Merkle tree, and checks RFC 3161 timestamps against the independent timestamp authority. If any record has been modified, the verification fails. No OAIS account, API key, or infrastructure access is required.
What is the difference between platform governance logging and independent audit custody?
Platform governance logging means the AI platform that generated the output also controls the log of that output. The log can be modified or selectively exported by the platform operator, and verification requires trusting the platform. Independent audit custody — what Sentinel provides — captures the audit record in a system architecturally separate from the AI platform. Records are cryptographically hashed, signed, Merkle-anchored, and independently timestamped. Any third party can verify the chain without trusting OAIS or the AI platform. For a detailed analysis, see our published research.
Can Sentinel Core work with on-premises AI models?
Yes. Sentinel Core integrates at the API layer and is agnostic to where the AI model runs. It works with cloud-hosted AI services (ChatGPT, Claude, Gemini), private cloud deployments, and on-premises models. The cryptographic hashing occurs locally, so interaction content never needs to leave the client environment regardless of deployment model.
Why can't our cloud team just write AI logs to an Amazon S3 bucket with Object Lock (WORM)?
Two problems. First, privacy: Object Lock makes stored data immutable. If prompts contain customer personal information, account numbers or Social Insurance Numbers, that data cannot be deleted or corrected, which makes PIPEDA and Quebec Law 25 obligations hard to meet. Second, independence: when the same team runs the AI platform and controls its logs, the record is not independent of the system it describes, and model risk reviews look for that separation. Sentinel addresses both: content is fingerprinted with a client-held HMAC key before anything is stored, so no plaintext is locked away, and Merkle roots are timestamped by independent authorities (Sectigo and DigiCert).
Won't Microsoft Purview, AWS Bedrock Guardrails, or Cohere just provide this natively?
Model providers have an inherent structural conflict of interest: asking an AI platform to audit its own hallucinations, bias, or data leakage violates regulatory segregation of duties. Furthermore, enterprise banks operate multi-cloud estates (Bedrock for developers, Azure OpenAI for Copilot, Google Cloud for search, and on-premises GPUs). Microsoft will not audit Bedrock; AWS will not audit Azure. Sentinel serves as a vendor-neutral, universal cryptographic audit plane across all foundation models.
What happens to our audit records if OAIS ceases business operations?
Your evidence does not depend on OAIS staying in business. Timestamp tokens are issued by independent authorities (Sectigo and DigiCert), not OAIS, and OAIS provides a standalone verifier that your auditors can run offline against an exported evidence bundle.
Why should financial institutions address OSFI E-23 today if enforcement is May 1, 2027?
OSFI does not evaluate whether an institution deployed governance software the day before May 1, 2027. Examiners evaluate the historical lifecycle evidence of models already operating in production. Evidence that was never captured cannot be recreated later. An institution that runs generative AI through 2026 without a tamper-evident record will have a gap in its history when supervisory review begins. A 30-day pilot establishes the evidence trail now, ahead of the May 1, 2027 effective date.
Built on Verifiable Trust
OAIS is founded on the principle that trust must be cryptographically verifiable, not assumed. Every claim we make about audit custody can be independently verified by any third party.
About OAIS
Optimized Artificial Intelligence Systems Inc. is a Canadian company founded by Daniel Fruman, who brings over a decade of experience in healthcare privacy compliance and data governance. The founding team includes senior leaders from institutional investment management, insurance operations, and financial services.
Privacy Policy
Sentinel Core is content-blind by design: OAIS receives cryptographic fingerprints, not client content. Our privacy practices are documented transparently.
Contact & Support
Reach our team directly at info@oais.ai. Located at 25 Sheppard Avenue West, Suite 300, Toronto, Ontario M2N 6S6, Canada. We welcome conversations about AI governance, OSFI E-23 preparation, and compliance requirements.
Independent Cryptographic Witnessing: OAIS is a content-blind witness to the sequence and timing of your AI interactions — we see cryptographic fingerprints, never your data. Because the record is anchored independently of the audited party, an interaction cannot be silently altered or omitted after the fact, and any third party can verify the entire chain with a standalone script — no OAIS account or API access required.
See Sentinel against your own AI estate
Tell us where AI runs in your organisation. We will come back with a scoped walkthrough — not a generic pitch.
-
1
Scoping call
Thirty minutes on your AI systems, cloud estate and OSFI E-23 timeline.
-
2
Technical walkthrough
Live capture, Merkle anchoring and independent verification of a Sentinel Core record — run by the architect.
-
3
Pilot proposal
If there is a fit: a 30-day pilot on one AI system with agreed success criteria.
Prefer email? info@oais.ai
Request received
Thank you. We will reply to to schedule your scoping call.
Reference
To add context or include a colleague, email info@oais.ai and quote your reference.