Definition
Proof of approval is a proof artifact establishing that an authorization genuinely occurred: a named, authorized approver sanctioned a specific action, at a specific moment, under a specific policy. It converts sign-offs — often the most consequential and disputed events in an organization — into independently verifiable evidence.
Because the proof commits to the approver’s identity and authority cryptographically, it cannot be back-dated, attributed to the wrong person, or fabricated without detection.
Why it matters
Approvals gate money, access, and risk. Proof of approval ensures these critical decisions are provable, not just recorded in a system someone could later alter.
- It prevents disputes over who approved what, and when.
- It enforces that only authorized parties can produce valid approvals.
- It provides regulators clear evidence of segregation of duties and controls.
- It protects individuals from having approvals misattributed to them.
Real-world examples
High-value payment authorization
A payment above a threshold requires a controller’s approval; the proof of approval confirms the authorized controller signed off before funds moved.
Privileged access grant
Granting admin access requires manager approval. The proof establishes the manager authorized it, supporting least-privilege controls.
Policy exception sign-off
An exception to policy is approved by a risk officer; the proof artifact evidences that the exception was properly authorized.
Visual explanation
Event
A business event happens
An approval, transaction, workflow step, decision, or AI action occurs inside your systems — exactly as it does today.
Proof
A proof artifact is generated
PFP deterministically produces a cryptographically signed proof artifact that commits to the event — without exposing the underlying sensitive data.
Verify
Anyone can independently verify
Auditors, regulators, partners, or AI systems validate the proof independently — confirming what happened without trusting a central party.
Frequently asked questions
Related concepts
Proof of Execution
Proof of execution is verifiable evidence that a process or workflow actually ran — completely, in order, and as defined.
Read articleIndependent Verification
Independent verification is the ability for any party to confirm that an event or claim is true using mathematics, without trusting the party that produced the evidence.
Read articleCompliance Evidence
Compliance evidence is proof that required controls, processes, and obligations were actually met — ideally in a form that can be independently verified.
Read articleRelated questions
Related comparisons
Where this applies
See it in action
Inspect a proof artifact and run independent verification in the live demo.