OpenChainGraph Suite · ART-377 · VoP / CoP liability evidence

VoP Session Receipt Builder

Binds a Verification-of-Payee / Confirmation-of-Payee session into a signed, hash-chained receipt: the declared match result, the warning text and severity shown, and the consumer's action (proceeded, abandoned, retried) for each attempt in the session. Each attempt's receipt hash chains to the prior receipt hash, rooted at a session-anchored genesis hash — reordering, inserting, or editing any attempt breaks every downstream hash. This is the liability artifact: “close-match warning displayed, score 82, consumer proceeded at T.”

VoP / CoP EvidenceHash-chained · offline-verifiableZero PIIW3C VC §13.11

🔒 All inputs are processed locally in your browser. No data is transmitted. Do not enter real personal data — use synthetic or anonymised inputs only.

Scope & fences

This receipt attests the COMPUTATION on the DECLARED session record — not ground-truth identity, and not what a PSP's own UI actually displayed. The PSP asserts the match result, the warning text/severity, and the consumer's action; this tool binds those assertions into a tamper-evident chain and says so in the artifact. An accepted score always carries its declared source — an undeclared source is not discarded, it is flagged (VOP_MATCH_SOURCE_UNDECLARED). Feeds from art-376 Payee Name-Match Score by tool_id reference only (no runtime dependency); an external score is equally acceptable with its own declared source string.

Presets

session_id (session identifier, as supplied)

Result

Execution Hash & §4 Artifact

SHA-256 execution hash (JCS canonical, RFC 8785):

Ask your agent

Copy this paragraph into Claude, OpenClaw, or any MCP-aware agent to run this exact tool, with this sample, and verify the artifact.

Run the AINumbers MCP tool `build_vop_session_receipt`. Task: Signed, hash-chained VoP/CoP session receipt binding the declared match result, warning shown, and consumer action across a session's attempts.
Call it with arguments: {"policy_parameters":{"session_id":"vop-sess-0001","attempts":[{"attempt_id":"a1","match_result":{"source":"score_payee_name_match","algorithm_version":"vop-namematch-1.0.0","score":100,"match_band":"MATCH"},"warning_shown":{"text":"","severity":"none"},"consumer_action":"proceeded","asserted_at":"2026-07-18T09:00:00Z"}]}}
Verify before trusting: call `verify_execution_hash` on mcp.ainumbers.co (https://mcp.ainumbers.co/mcp) with the parameter `claimed_hash` set to the returned `execution_hash`, passing the full artifact the run returned (the object containing `policy_parameters` + `output_payload` + `execution_hash`; equivalently `policy_parameters` + `output_payload` with `claimed_hash`), not the bare hash string.
Return the ledger link https://ledger.ainumbers.co/ so a human can re-verify without contacting us.
PII rule: All inputs are processed locally in your browser. No data is transmitted. Do not enter real personal data — use synthetic or anonymised inputs only.
Open the tool with the sample prefilled: https://ainumbers.co/chaingraph/art-377-build-vop-session-receipt.html#p=v1.H4sIAAAAAAAA_wEuAdH-eyJzZXNzaW9uX2lkIjoidm9wLXNlc3MtMDAwMSIsImF0dGVtcHRzIjpbeyJhdHRlbXB0X2lkIjoiYTEiLCJtYXRjaF9yZXN1bHQiOnsic291cmNlIjoic2NvcmVfcGF5ZWVfbmFtZV9tYXRjaCIsImFsZ29yaXRobV92ZXJzaW9uIjoidm9wLW5hbWVtYXRjaC0xLjAuMCIsInNjb3JlIjoxMDAsIm1hdGNoX2JhbmQiOiJNQVRDSCJ9LCJ3YXJuaW5nX3Nob3duIjp7InRleHQiOiIiLCJzZXZlcml0eSI6Im5vbmUifSwiY29uc3VtZXJfYWN0aW9uIjoicHJvY2VlZGVkIiwiYXNzZXJ0ZWRfYXQiOiIyMDI2LTA3LTE4VDA5OjAwOjAwWiJ9XX3WRTlfLgEAAA