Post Oak Labs · OpenChainGraph v0.3 · Educational Tool

Build a chain. See the wiring.

Click tools from the palette to compose a multi-step compliance workflow. Watch parent_hash links auto-populate in real artifacts. Then switch to Compare mode to see exactly what this replaces in the legacy world.

📚 A learning tool for students, educators, and newcomers. It teaches how chains and provenance wire together and does not execute anything. Ready to actually run a chain? Open the Workbench or the Canvas.

For students & educators Click to compose Live parent_hash wiring DAG visualization Legacy vs OCG comparison Zero egress · WebCrypto

Scenario

Basel III internal capital adequacy assessment: VaR → stress → liquidity/credit → RWA → regulatory report.

AML consolidation: transaction risk profiling → SAR threshold + layering typology → gap audit → SAR narrative.

Fraud decisioning: customer risk rating → fraud graph + anomaly detection → credit default scoring + DORA incident classification.

How this works

Click a tool to add it to the chain. Each artifact records its parents' execution_hash — so every node is cryptographically linked to the outputs that drove it. Grayed tools unlock once their dependencies are present.

Available tools — click to add

risk_control

VaR / FRTB IMA Calculator

Value-at-Risk under Basel FRTB Internal Models. No inputs required — root node.

risk_control

Stress Test Aggregator

Needs VaR artifact as parent. Applies stress scenarios to the VaR baseline.

liquidity_mandate

LCR / NSFR Checker

Needs VaR artifact. Checks liquidity coverage using the risk position.

credit_assessment

Counterparty Credit Scorer

Needs stress test results. Scores counterparty risk given stressed positions.

rwa_mandate

Basel RWA Calculator

Needs LCR + Credit scores. Computes risk-weighted assets across all inputs.

regulatory_report

ICAAP / COREP Reporter

Needs RWA artifact. Produces the final regulatory submission package.

Dependency guide

Tools unlock in order. Each tool records its parents' execution hashes — forming the tamper-evident DAG.

⬡

Chain is empty

Start with VaR / FRTB IMA — it's the only tool available until you have a risk baseline. Subsequent tools unlock as you add dependencies.

Suggested path

VaR → Stress Test → LCR/NSFR → Credit → RWA → Report

Artifact JSON — click a node to inspect

Click any node in the DAG above to see its full OCG v0.3 artifact, including the parent_hashes array that creates the chain link.

Same compliance audit. Two worlds. Below is the Basel ICAAP audit trail — one of the most intensive regulatory workflows in banking — as it exists today versus how it looks under OpenChainGraph. Each scenario below is a real workflow pattern drawn from Basel III/IV ICAAP submissions.

📂

Legacy process

Today — email, PDF, shared drives

⛓

With OpenChainGraph

Hash-linked, verifiable, machine-readable

Audit outcome — legacy

Audit outcome — OCG

Why verifiability matters at audit time

In a legacy audit, a regulator receives a PDF that says "our VaR is $2.85M." To challenge it, they must request the underlying model, the input data, and the calculation methodology — three separate documents, often in three different departments. Under OCG, the execution_hash is a single identifier that simultaneously proves the inputs, the computation, and the output haven't been altered. The auditor runs one SHA-256 check, in their own browser, against the artifact. No document requests, no email chains, no version confusion.