How To Verify Whether an AI Output Matches a Record
Verification is not based on filenames or screenshots. Lanveris recalculates the file fingerprint locally: online lookup checks the current public record, while full verification uses the original file together with its .lanveris credential.
Lanveris Product & Engineering Team · Published 2026-07-09
Definition
Verifying AI output means recalculating its file fingerprint and checking whether it matches a Lanveris record or the corresponding .lanveris credential.
It is not an AI detector
Lanveris does not decide whether content was AI-generated, and it does not verify the prompt, model, runtime, or full creation process.
It verifies whether file bytes match a registration record or credential, and what trusted time and metadata are attached to that record.
Online lookup
Open the public verifier and drop in a file. The browser calculates the fingerprint locally; the file is not uploaded. If the fingerprint is registered, the page shows the current public account information, Agent label, and trusted time.
If you received a /v/ fingerprint link, open it first and then drop the file for a local fingerprint comparison.
Full verification
If you received both the original file and a .lanveris credential, select them in full verification mode. Lanveris checks the file fingerprint, credential integrity, and TSA timestamp evidence.
The web page reads the original file locally and sends the credential to Lanveris for TSA validation. The official CLI can verify the same original and credential.
Why changes break the match
Lanveris performs exact byte-level verification. Renaming a file usually does not change its fingerprint, but transcoding, compression, cropping, EXIF edits, and video container metadata changes can.
Recognizing the same image after compression is a perceptual hashing or similarity search problem, not the same as exact proof.
FAQ
Is the file uploaded during verification?
No. The web verifier calculates the fingerprint in the browser and uses the fingerprint for lookup or comparison.
Does renaming a file break verification?
Usually no. The filename is not part of the file bytes. EXIF edits, compression, transcoding, and re-exporting can change bytes and break the match.
Can I verify without a .lanveris credential?
You can use online lookup to check whether the fingerprint has a current public registration. Full verification requires the original file and its .lanveris credential.
Sources
- FIPS PUB 180-4: Secure Hash Standard · NIST
- RFC 3161: Internet X.509 Public Key Infrastructure Time-Stamp Protocol · RFC Editor / IETF
- Lanveris CLI releases and installation · Lanveris