Auditor evidence pack

Savings claim at finance validate

Procurement & Source-to-Pay · Savings Assurance · line PR11A · Savings Validation. more

Chain verified

Every record links to the one before it and hashes to its stored value. 4 records were re-hashed on this page load, in order, starting from the genesis value. Nothing was read from a cached verdict.

hash = sha256(prevHash + "|" + JSON{seq, unitRef, actor, action, outcome, occurredAt})

Records

Append-only, sequenced

Agent actions

Taken by software

Human actions

Taken by a named person

Refusals

Blocked by the authority register

Corrections

Later record supersedes an earlier one

Legal hold

Held

HOLD-003

The unit

What the work was, and where it sits

Reference

PR11A-1041

Subject

Daniel Petrov

Requested by

Hannah Bianchi

Value

$46k

Materiality

medium

Currently held by

Savings Claim Agent (agent)

Sub-function owner

Director, Value Assurance

Orchestrator

Savings Assurance Orchestrator

Every action, in order

Actor, authority, versions in force, and the hash link to the record before it

Savings Claim AgentgbsCleared

Cleared claim

2026-08-18 06:08:00ZAuthority PR11-AUTH-A1 · cap $250,000Jurisdiction SGAutonomy A4Retention PROC-7YLegal hold HOLD-003

Model

[email protected]

Prompt

task-execution@p21

Policy

supplier-onboarding@v6

Tools

ledger-write@t7, document-fetch@t9

in 2d33c4fe...371777out 7d26214c...726c6aartifact ART-PR11A-1005-1 genesis → 11398dbc...0ad4d3

Savings Claim AgentgbsCleared

Cleared verify baseline

2026-08-18 06:51:00ZAuthority PR11-AUTH-A1 · cap $250,000Jurisdiction SGAutonomy A4Retention PROC-7YLegal hold HOLD-003

Model

[email protected]

Prompt

task-execution@p21

Policy

supplier-onboarding@v6

Tools

ledger-write@t7, document-fetch@t9

in 8e33d2d2...020d0aout ef4ff10e...e978e6artifact ART-PR11A-1005-2 11398dbc...0ad4d3 → 8b2483b6...e057a7

Realization Tracking AgenttaskCleared

Cleared model realization

2026-08-18 07:34:00ZAuthority PR11-AUTH-A1 · cap $250,000Jurisdiction SGAutonomy A4Retention PROC-7YLegal hold HOLD-003

Model

[email protected]

Prompt

task-execution@p21

Policy

supplier-onboarding@v6

Tools

document-fetch@t9, read-only-lookup@t12

in 79fdd345...aafe75out e0bf43c3...1407afartifact ART-PR11A-1005-3 8b2483b6...e057a7 → d516e938...474ef9

Director, Value Assurancegate-approverIn progress

Holding at finance validate

2026-08-18 08:17:00ZAuthority PR11-AUTH-H1 · cap $250,000Jurisdiction SGAutonomy A0Retention PROC-7YLegal hold HOLD-003

Model

human@n-a

Prompt

human@n-a

Policy

supplier-onboarding@v6

Tools

none

in 517c75f9...776de0out 7b4f25bd...4fa911artifact ART-PR11A-1005-4 d516e938...474ef9 → d67a7052...cc6315

Authority relied on

Who was allowed to do this, up to what value, in which jurisdictions

PR11-AUTH-A1ActiveSavings Assurance Orchestrator

Any unit on a savings assurance line where every intake check passed, the policy in force is current, and the value sits inside the cap below.

Cap $2,000,000US · UK · DEDelegated from Director, Value AssuranceExpires 2027-03-03

PR11-AUTH-H1ActiveDirector, Value Assurance

Anything the agent grant refuses, plus any override of an agent outcome. more

Cap $25,000,000US · UK · DEDelegated from Procurement & Source-to-Pay leadershipExpires 2027-02-03

Versions in force

Exactly what was running when these actions were taken

Kind	Identifier	Version	Status	Owner
model	extract-lite	2.9	current	Platform model council
policy	supplier-onboarding	v6	current	Chief procurement officer
prompt	task-execution	p21	current	Shared service engineering
toolset	ledger-write	t7	current	Finance systems
toolset	read-only-lookup	t12	current	Platform engineering
toolset	document-fetch	t9	current	Shared service engineering

Gates on this line

The control points this unit had to clear

Finance validate

Held for a named human when the unit exceeds the savings claim decision envelope, when confidence falls below the floor, or when a policy clause is engaged.

Approver: Director, Value Assurance · cleared on this chain

Approve

Held for a named human when the unit exceeds the savings claim decision envelope, when confidence falls below the floor, or when a policy clause is engaged.

Approver: Director, Value Assurance · not reached

Records schedule and holds

How long this evidence must be kept, and whether it is frozen

PROC-7Y7 years

Supplier and contract evidence

Contract limitation periods and public-sector supplier audit rights.

Deleted at seven years from contract expiry, not from record creation.

HOLD-003active

Supplier dispute — award challenge

An unsuccessful supplier has challenged an award on process grounds. more

Custodian Head of Commercial Law · requested by Chief Procurement Officer

What this pack proves, and what it does not

Read this before you rely on it

It does prove

Every action carries a named actor, an actor kind, and a timestamp.
Every action names the authority grant that permitted it and the cap that grant carries.
Every action stamps the model, prompt, policy and tool versions in force at that moment.
Corrections are additive. A later record supersedes an earlier one and says why more
The chain is re-hashed live on this page, so a single altered field is detected immediately.

It does not prove

It is not tamper-proof against an attacker with write access to the store, who could rewrite the whole chain from genesis. more
The evidence in this demonstration is modeled from a simulated estate, not captured from production systems.
Identity here is the actor name recorded on the action. more