ISO 20022 Securities-Settlement Message Conformance

ISO 20022 securities-settlement / penalty message linting (ART-82) -> Merkle integrity over the message batch (cry-04) -> CSD/counterparty-framed cover memo (ptg-01). Scoped to the sese/semt securities family, distinct from the payments CBPR+ migration.

OpenChainGraph · 3 Steps prompt template Hash-Anchored §4 chain_depth:3 Client-Side · Zero PII

Chain Stages · 3 Steps

1 ROOT · D0 node

Securities-Settlement Message Linter (ISO 20022 sese/semt) art-82-securities-settlement-message-linter

validation results (H1) feed the verifier

MCP Call · lint_securities_settlement_message

{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "lint_securities_settlement_message",
    "arguments": {}
  },
  "id": 1
}

↓

2 D2 node

Merkle Batch Verifier cry-04-merkle-batch-verifier

batch integrity (H2) feeds the memo generator

MCP Call · verify_merkle_batch

{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "verify_merkle_batch",
    "arguments": {}
  },
  "id": 1
}

↓

3 TERMINAL · D3 node

AP2 Prompt Template Generator ptg-01-ap2-prompt-template-generator

Exports composite message-conformance artifact with Merkle-root execution_hash (H3) -- final stage

MCP Call · compose_ap2_prompt

{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "compose_ap2_prompt",
    "arguments": {}
  },
  "id": 1
}