Reference integrity guide
What is Crossref, and how do you verify a DOI?
Understand what Crossref records can—and cannot—prove, then use a source-by-source workflow to verify DOI links and reference metadata before submission.
AcademicFix
A DOI that resolves is not automatically the correct DOI. Reliable verification connects the identifier, landing page, metadata, work type and cited version.
AcademicFix
Practical check
- 01
Normalise the DOI without changing its characters
- 02
Resolve it through https://doi.org/
- 03
Compare author, title, year and publication record
- 04
Confirm the work type and version actually cited
- 05
Record unresolved or conflicting evidence instead of guessing
Verification decision
A DOI is verified only when the identifier and the cited work agree.
Use the resolved landing page, Crossref metadata and the cited file together. A successful redirect is the start of verification, not its conclusion.
| Field | Accept when | Flag when |
|---|---|---|
| Identifier and destination | The exact DOI resolves to a credible record for the cited work. | It fails, redirects elsewhere or identifies a different output. |
| Title and authors | The substantive title and author identity agree across the records. | A similar title masks different authors, ordering or authorship. |
| Date and publication | The year, journal or publisher, volume, issue and locator fit the cited version. | Online-first, issue or article-number details have been mixed. |
| Object and version | The DOI identifies the article, preprint, dataset or component actually consulted. | It points to a correction, supplement or another version of the work. |
| Current status | No visible update changes how the source should be cited or interpreted. | A correction, withdrawal, retraction or other update requires review. |
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Separate Crossref, DOI and the publisher page
Crossref is a not-for-profit DOI registration agency and open scholarly-metadata infrastructure. Its members deposit records about research outputs and maintain the links associated with the DOIs they register. Crossref is therefore neither the entire DOI System nor a universal full-text archive.
The DOI Foundation governs the DOI System, while registration agencies serve particular communities. A DOI identifies a referent; the doi.org resolver directs a request to the current location stored for that DOI. The publisher or repository landing page is the destination, not the identifier itself.
- Crossref is described as a registration agency, not the DOI owner of every work
- DOI and destination URL are treated as different objects
- A metadata record is not presented as proof of full-text access
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Normalise and resolve the DOI
Remove presentation prefixes such as “doi:” and surrounding spaces, but do not silently alter the identifier. Present a verified DOI as a complete https://doi.org/ link unless the target style requires another form.
Open the link. Resolution confirms that the identifier has a current destination; it does not by itself confirm that the destination describes the work in your reference. A link can resolve to a correction, supplement, dataset, protocol or different article.
- The identifier is copied exactly
- The https://doi.org/ link opens without an obvious error
- Redirects end on a credible publication or repository record
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Compare the metadata field by field
Compare the resolved record with the reference: author order, title, publication year, journal or publisher, volume, issue, page range or article number. Crossref metadata is primarily supplied by members, so completeness varies and conflicts should be investigated rather than hidden.
Use the most authoritative available record for the field in question. A publisher landing page may clarify the final title or correction status; Crossref can expose structured bibliographic metadata and relationships; the cited file itself shows which version the author actually used.
- Author order and title match the cited work
- Year and container information are consistent
- Article number, pages and version are not mixed across records
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Confirm the object type and publication version
One research project can have separate DOIs for a preprint, final article, dataset, protocol, correction or supplementary component. Choose the identifier for the object actually supporting the claim, and do not merge details from several versions into a reference that never existed.
When a final version is available, replacing a preprint may improve traceability, but the decision must preserve what was consulted and what the manuscript claims. Check update, withdrawal or correction signals where the publication record provides them.
- The DOI identifies the cited object type
- Preprint and version-of-record details are not combined
- Corrections or withdrawals are considered when visible
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Treat DOI lookup as evidence matching, not string matching
A title search can return plausible but incorrect results, especially for short titles, conference materials and similarly named papers. Accept a candidate only when multiple independent fields agree. A high text-similarity score is not a substitute for bibliographic identity.
If no reliable match exists, leave the DOI absent and document the search result. Many older publications, books, local journals, reports and web resources legitimately have no DOI. Inventing one is more damaging than reporting that none was found.
- Candidate matches agree on multiple bibliographic fields
- No DOI is inferred only from title similarity
- Unresolved records are listed separately for author review
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Repeat verification on the final submission file
Reference-manager libraries, copied bibliographies and document conversions can reintroduce errors after an earlier check. Reconcile citations and references after the last substantive revision, then test DOI links in the exact Word or PDF file that will be submitted.
Keep a compact verification log: verified DOI, conflicting metadata, no DOI found, wrong object type or author decision required. This makes the process reviewable without implying that automated retrieval guarantees correctness.
- Final text and final reference list were reconciled
- Links were tested in the submission file
- Ambiguous records have an explicit decision trail
Reference integrity guide
Frequently asked questions
Is Crossref the same thing as DOI.org?
No. Crossref is a DOI registration agency and metadata infrastructure. DOI.org is the resolver operated within the DOI System to direct DOI requests to registered locations.
Does every academic source have a DOI?
No. A DOI should be added only when one exists and can be matched confidently to the cited object. Absence of a DOI is not automatically a reference error.
If a DOI link opens, is the reference verified?
Not yet. Resolution must be followed by a comparison of authors, title, year, publication details, object type and version.
AcademicFix
Sources and further reading
Sources were selected for direct authority: system documentation, original reporting-guideline papers and the guideline registry. Accessed 9 August 2026.
- 01Crossref — About us
Crossref's role, mission and community-governed scholarly infrastructure.
- 02Crossref — Metadata Retrieval
Open metadata, deposit sources, retrieval interfaces and reference matching.
- 03DOI Foundation — DOI Handbook
DOI governance, registration agencies, identifiers and resolution.
- 04Crossref — Maintaining your metadata
Registrant responsibilities for live landing pages and current metadata.
- 05Crossref — Crossmark
Official guidance for checking corrections, retractions and other updates supplied by participating members.