How TrimProof verifies an exported clip
See the sample-level and decode checks completed before a passthrough export becomes a delivered file.
Direct answer
TrimProof writes a hidden partial file, fingerprints compressed video and AAC payloads with SHA-256, checks presentation order and timeline coverage, decodes samples near both edges, and confirms the source did not change. Only a passing result is atomically delivered.
When this guide applies
- Require evidence that expected compressed payloads were copied.
- Writing completed but delivery still needs verification.
- Understand creation versus verified delivery.
Step-by-step review
Write a hidden partial
Keep incomplete work away from the final path.
Compare payload fingerprints
Calculate SHA-256 over expected and output video and optional AAC payloads.
Check order and coverage
Verify presentation ordering and expected safe-timeline coverage.
Decode both edges
Decode samples near the beginning and end to detect broken dependencies.
Confirm source and deliver
Require unchanged source identity before atomic promotion.
How macOS works here
Payload checks test passthrough
Matching compressed fingerprints provide direct evidence about copied media payloads.
Edge decoding tests the cut
Both boundaries are decoded to check that the GOP-safe clip begins and ends coherently.
Atomic promotion separates delivery
The selected destination appears only after the complete gate passes.
Risks and actions to avoid
Hashes have a defined scope
They test copied payload correspondence, not who created the source or whether its content is true.
Source changes invalidate the run
Replacing or modifying the source prevents trusted delivery.
Verification does not broaden support
Checks apply only after documented preflight succeeds.
What the Omuuz product can—and cannot—do
What it can do
TrimProof can verify payload correspondence, timeline order and coverage, edge decodability, and unchanged source identity.
What it cannot do
It cannot certify source authorship, semantic truth, or behavior in every unrelated player.
Product evidence
