Evidence you can inspect.

Evident checks public bibliographic metadata. It does not certify that an AI answer is correct.

What we query

A DOI is looked up in Crossref and, when needed, DataCite. arXiv identifiers are mapped to their 10.48550/arXiv DOI and checked with DataCite first. DataCite’s public API exposes findable records only. Other DOI registration agencies and unregistered works are outside this check.

How to read a result

Record found

The registry returned a record for that DOI. If you supplied a title or year, the comparison appears separately. Missing fields are never treated as verified.

Fields differ

A normalized title or supplied year differs from public metadata. Title comparison ignores case, punctuation and spacing, but does not infer semantic equivalence. Online and print publication years can differ; any deposited publication year is accepted. Translation, editions or deposit errors can cause differences.

No record found

Both Crossref and DataCite returned no public record. This does not prove that the work is fabricated. Check spelling, registration agency and publication status.

Check incomplete

A timeout, rate limit, invalid response or partial lookup prevented a reliable outcome. Retry later.

Candidates to inspect

You enabled title search. Up to three Crossref search results are shown, without claiming an identity match. Inspect authors, edition and year before choosing a DOI.

Identifier needed

No supported DOI/arXiv identifier was supplied and title search was off.

What is not checked

We do not read the full paper or verify claim support, quotations, author identity, retractions, peer review, research quality or originality. No AI detector or general truth score is used. A real DOI can be attached to an unrelated claim.

Where your input goes

Your request is processed by Evident on Cloudflare. DOI lookups send only the normalized DOI to the public registries; supplied comparison titles and years stay within this request. If you explicitly enable title search, a title-only entry is sent to Crossref. Do not paste private drafts, personal information or credentials. We do not save your input or report in our database, analytics or browser storage. Downloaded files and copied text remain under your control.

Public DOI metadata may be cached for six hours. Reports show each record’s retrieval timestamp. Anonymous daily counts measure checks, result categories, exports and optional helpfulness clicks; bots and retries can count. Temporary hashed network-address buckets enforce rate limits. Hosting and registry providers process requests under their own policies. Full privacy notice.

Capacity

At most 10 references per check, 12 batches per network address per 10 minutes, and a shared daily limit of 1,000 batches. A check has a 25-second processing budget. Public upstream APIs may impose stricter limits. There are no paid calls, and no paid plan or availability guarantee is implied.