
Open methodology data · 2026
OSINT source-reliability matrix.
A source is not reliable by category alone. This reference helps ask four repeatable questions while preserving the context, date and limitations of each item.
Four reading dimensions
Ask what the source can establish—not whether it looks convincing.
Can the origin and chain be identified?
Is this genuinely separate from the claim?
Does its date fit the decision?
What precise fact can it support?
Scores describe typical properties of a source type, not the automatic reliability of every document. Origin, date, scope and corroboration remain essential.
Interactive reference
Filter 32 source types by category and evidential value.
Results: 32
Official register
- Provenance
- 4 / 4
- Independence
- 4 / 4
- Freshness
- 3 / 4
- Evidence
- 4 / 4
Existence, status, officers or filings within the register’s scope.
Caution: A register reflects its rules, date and submitted information; it does not prove every real-world activity.
Published court decision
- Provenance
- 4 / 4
- Independence
- 4 / 4
- Freshness
- 3 / 4
- Evidence
- 4 / 4
Establish a decision, proceeding and published outcome.
Caution: Check jurisdiction, date, appeal status, anonymisation and exact scope.
Public-authority publication
- Provenance
- 4 / 4
- Independence
- 3 / 4
- Freshness
- 4 / 4
- Evidence
- 4 / 4
Official position, alert, statistic or instruction within a defined field.
Caution: Separate observed data, institutional communication and recommendation.
Company filing or report
- Provenance
- 4 / 4
- Independence
- 2 / 4
- Freshness
- 3 / 4
- Evidence
- 3 / 4
Statements, accounts, governance and events published by the entity.
Caution: Primary evidence of the statement, but interested in its interpretation.
Official site or account
- Provenance
- 3 / 4
- Independence
- 2 / 4
- Freshness
- 4 / 4
- Evidence
- 3 / 4
Declared channels, offers, positions and operational information.
Caution: Verify the domain or account and preserve the dated version.
Identifiable original document
- Provenance
- 4 / 4
- Independence
- 2 / 4
- Freshness
- 3 / 4
- Evidence
- 4 / 4
Establish the content of a statement or act at a given time.
Caution: Authenticate issuer, integrity, version and production context.
Identifiable media with editorial process
- Provenance
- 3 / 4
- Independence
- 3 / 4
- Freshness
- 4 / 4
- Evidence
- 3 / 4
Context, attributed testimony, chronology and reporting.
Caution: Return to cited sources and distinguish reporting, opinion, wire copy and correction.
Specialist publication
- Provenance
- 3 / 4
- Independence
- 3 / 4
- Freshness
- 3 / 4
- Evidence
- 3 / 4
Technical or sector context and expert interpretation.
Caution: Check expertise, method, funding and proximity to the subject.
Scientific paper or methodical study
- Provenance
- 4 / 4
- Independence
- 3 / 4
- Freshness
- 2 / 4
- Evidence
- 4 / 4
Method, limitations, findings and state of knowledge for a defined question.
Caution: Check review status, sample, replication, date and fit to the case.
Web archive
- Provenance
- 3 / 4
- Independence
- 4 / 4
- Freshness
- 2 / 4
- Evidence
- 3 / 4
Show that a page or version was archived at a given date.
Caution: An archive may be incomplete and does not prove author, intent or every loaded resource.
Domain or certificate history
- Provenance
- 3 / 4
- Independence
- 4 / 4
- Freshness
- 4 / 4
- Evidence
- 3 / 4
Dates, technical relationships and visible changes in public infrastructure.
Caution: A technical relationship proves neither common ownership nor common intent.
Documented dataset or API
- Provenance
- 4 / 4
- Independence
- 3 / 4
- Freshness
- 4 / 4
- Evidence
- 4 / 4
Compare structured observations with explicit method, date and variables.
Caution: Check definitions, coverage, series breaks, licence and missing values.
Attributed direct witness
- Provenance
- 3 / 4
- Independence
- 3 / 4
- Freshness
- 4 / 4
- Evidence
- 2 / 4
Understand a lived observation and guide verification.
Caution: Memory, perception and witness interest require corroboration and context.
Attributed social post
- Provenance
- 2 / 4
- Independence
- 2 / 4
- Freshness
- 4 / 4
- Evidence
- 2 / 4
Establish that an account displayed content at a given time.
Caution: Identity, actual author, context and account integrity may remain uncertain.
Unsourced anonymous claim
- Provenance
- 1 / 4
- Independence
- 1 / 4
- Freshness
- 3 / 4
- Evidence
- 1 / 4
Identify a lead or narrative to verify, not a conclusion.
Caution: Do not attribute, republish or treat as fact without independent sourcing.
Automated detector score
- Provenance
- 2 / 4
- Independence
- 2 / 4
- Freshness
- 3 / 4
- Evidence
- 1 / 4
Guide analysis when model, version and validity domain are known.
Caution: A score alone proves neither authenticity, manipulation nor origin.
Public procurement notice
- Provenance
- 4 / 4
- Independence
- 4 / 4
- Freshness
- 3 / 4
- Evidence
- 4 / 4
Published subject, buyer, timetable and award within a procedure.
Caution: A notice does not prove delivery or outcome of the contract.
Regulator decision
- Provenance
- 4 / 4
- Independence
- 4 / 4
- Freshness
- 3 / 4
- Evidence
- 4 / 4
Published finding or measure by an authority within its remit.
Caution: Check date, appeal status, scope and later corrections.
Public code repository
- Provenance
- 3 / 4
- Independence
- 2 / 4
- Freshness
- 4 / 4
- Evidence
- 3 / 4
History of files, versions and claims associated with a project.
Caution: A public account or repository can be copied, abandoned or misattributed.
Software package registry
- Provenance
- 3 / 4
- Independence
- 2 / 4
- Freshness
- 4 / 4
- Evidence
- 3 / 4
Published versions, declared maintainers and dependencies for a package.
Caution: A maintainer name alone does not establish real identity.
Certificate transparency log
- Provenance
- 4 / 4
- Independence
- 3 / 4
- Freshness
- 4 / 4
- Evidence
- 3 / 4
Dated certificate issuance and names covered at that time.
Caution: A certificate proves neither current ownership nor an active service.
Passive DNS history
- Provenance
- 3 / 4
- Independence
- 2 / 4
- Freshness
- 3 / 4
- Evidence
- 3 / 4
Observed domain, subdomain and address relationships over time.
Caution: Coverage varies by collector; shared addresses can create false links.
Syndicated article
- Provenance
- 3 / 4
- Independence
- 1 / 4
- Freshness
- 3 / 4
- Evidence
- 2 / 4
Distribution and wording of a story carried by several outlets.
Caution: Identical republications are not independent corroboration.
Platform transparency report
- Provenance
- 3 / 4
- Independence
- 2 / 4
- Freshness
- 3 / 4
- Evidence
- 3 / 4
Measures reported by a platform under its own method and period.
Caution: Examine the publisher’s categories, denominators and incentives.
Vendor or authority security advisory
- Provenance
- 4 / 4
- Independence
- 3 / 4
- Freshness
- 3 / 4
- Evidence
- 4 / 4
Product, affected versions, mitigations and publication date in a notice.
Caution: A notice reflects its publisher’s known scope; it does not prove a particular asset is exposed.
Official breach notification
- Provenance
- 4 / 4
- Independence
- 3 / 4
- Freshness
- 3 / 4
- Evidence
- 3 / 4
Facts, data categories and period reported by the responsible organisation.
Caution: An initial notice may be revised as investigation continues.
Public ad library
- Provenance
- 3 / 4
- Independence
- 2 / 4
- Freshness
- 3 / 4
- Evidence
- 3 / 4
Creative, dates and displayed advertiser within a platform’s transparency scope.
Caution: The library may be incomplete and a displayed advertiser does not prove brand approval.
Original email headers
- Provenance
- 3 / 4
- Independence
- 3 / 4
- Freshness
- 4 / 4
- Evidence
- 3 / 4
Technical route and authentication results of a preserved message.
Caution: Successful domain authentication does not prove the request itself is legitimate.
Observed live DNS answer
- Provenance
- 3 / 4
- Independence
- 2 / 4
- Freshness
- 4 / 4
- Evidence
- 2 / 4
Publicly advertised address or service at a recorded observation time.
Caution: A current answer need not describe a past configuration or actual ownership.
Preserved original media file
- Provenance
- 3 / 4
- Independence
- 3 / 4
- Freshness
- 3 / 4
- Evidence
- 3 / 4
Content, format and metadata of a file received before known transformation.
Caution: Metadata may be absent or altered and does not establish authorship on its own.
Platform review
- Provenance
- 2 / 4
- Independence
- 2 / 4
- Freshness
- 4 / 4
- Evidence
- 2 / 4
Experience or opinion attributed to an account in a given service context.
Caution: One review alone does not establish a real transaction, identity or coordinated campaign.
Fact-checking article
- Provenance
- 3 / 4
- Independence
- 3 / 4
- Freshness
- 3 / 4
- Evidence
- 3 / 4
Published method, sources and reasoning for a specific claim.
Caution: The conclusion depends on the exact claim tested, available sources and publication date.
No source type matches these filters.
Method
How to use the matrix in a real case.
Begin with the fact to establish. A corporate register may be strong for a recorded officer but weak for current operational control; a direct witness may be fresh but still require independent corroboration.
Record the exact item, publisher, URL, consultation date, covered period and transformation applied. Then score the item—not the entire publisher—and explain why.
Use scores to expose disagreement and missing checks. Never average them into a certainty percentage.
Apply the reference
Move from source appraisal to a concrete check.
FAQ
Use source categories without overclaiming.
Is an official source always true?
No. It is strong evidence of what the institution recorded or stated within its scope and date. It may still be incomplete, corrected or unsuitable for a different question.
Can the four scores be added together?
No. They are separate reading dimensions, not a universal reliability grade. A source can be fresh but weak as evidence, or authoritative but outdated.
Why are automated detector scores rated cautiously?
A detector answers a narrow model-dependent question. Without validation, version, media type and error context, its score cannot establish authenticity or origin.
Apply the method
A source matrix clarifies evidence. A scoped review connects it to the actual decision and remaining uncertainty.
Provenance, version and reuse
IIS editorial reference, not a statistical dataset. Recommendations and scores are case-dependent reference points, not scientifically validated measurements.
Dataset version: . Stable record IDs connect the bilingual JSON and CSV exports. Keep the caveats with each definition or recommendation.