OpenChainGraph Suite · CONTRACT A3 · arch #5

ISO 20022 Cutover

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.

Truncation audit > migration score > cross-rail compatibility check.

OpenChainGraph · 3 Steps compliance mandate Hash-Anchored §4 chain_depth:3 Client-Side · Zero PII
Chain Topology — Iso Truncation Auditor → Iso20022 Migration Scorer → Iso20022 Cross Rail Compatibility
§4 Execution Hash · Chain Definition Anchor
execution_hash:computing…
Chain Stages · 3 Steps
1 ROOT · D0 catalog
Iso Truncation Auditor 77-iso-truncation-auditor
truncation_risks and field_map feed Stage 2 migration scoring
↓
2 D2 catalog
Iso20022 Migration Scorer 101-iso20022-migration-scorer
migration_score and readiness_flags feed Stage 3 cross-rail check
↓
3 TERMINAL · D3 catalog
Iso20022 Cross Rail Compatibility 254-iso20022-cross-rail-compatibility
Exports ISO 20022 cutover Policy Mandate, final stage
▶ 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.