OpenChainGraph Suite · CONTRACT A3 · arch #5

NACHA ACH Rules Compliance

Note (dated 2026-08-04): a chain composes independent computations performed in an analytical order. No step's output is carried into the next step by the execution model; each step computes from its own declared inputs. This is true of every chain on this site, including chains whose per-step copy below reads as a data handoff.

ACH/NACHA message validation > NACHA ACH rule compliance checking — composite NACHA ACH rules compliance mandate.

OpenChainGraph · 2 Steps compliance mandate Hash-Anchored §4 chain_depth:2 Client-Side · Zero PII

Chain Topology — Ach Nacha Validator → Nacha Ach Rule Compliance Checker

§4 Execution Hash · Chain Definition Anchor

execution_hash:computing…

Market Rationale

Buyer: ACH Operations Officer / Payments Compliance Lead at US bank or ODFI

Forcing function: NACHA ACH risk framework updates 2024; FedNow interoperability requirements; same-day ACH expansion

Chain Stages · 2 Steps

1 ROOT · D0 catalog

Ach Nacha Validator 07-ach-nacha-validator

ach_message_validation and format_errors feed Stage 2 NACHA rule compliance check

↓

2 TERMINAL · D2 catalog

Nacha Ach Rule Compliance Checker 224-nacha-ach-rule-compliance-checker

rule_compliance_status and violation_flags — final NACHA ACH compliance mandate

▶ Run this chain (live) browser · real execution · composite §4 hash

Export Artifacts

Download the §4 chain definition artifact (hash-anchored composite JSON) or the §13.11 W3C Verifiable Credentials view. Both derive from the chain definition — no new hash is minted. Available after hash computation.