DOCUMENT FORENSICS · API

Every claim
on a document,
on the record.

ProofMart takes a PDF and returns a structured report of findings, each pinned to its pixel, each with the arithmetic. You read the rail, not the doc.

READ THE RESPONSE

SAMPLE SCAN · REQ_8FK2reads from the rail →

DOCUMENT

6pages

FINDINGS

42 FAIL · 2 REVIEW

VERDICT

× FAIL

REQ_8FK2 · LIVEDRAG A PDF ONTO THE RAIL ↓

hdfc_apr25_statement.pdf6 pages · 2.1 MB · 4.8s

FAIL4 markers

page4of 6
SAMPLE · synthetic document. Drop, paste, or click to try a real one

FINDINGS

2 FAIL2 REVIEW0 CLEAR

↵

Tab · Enter to pin · Esc to clearproofmart.shop/d/req_8fk2

BUILT FOR

LENDING  ·  VERIFICATION  ·  RISK  ·  ACCOUNTING  ·  COMPLIANCE

§ 02 · PIPELINE

From bytes
to bounded evidence.

Every stage writes back to the same address space: page, x, y, run. When you click a finding in the rail you land on the exact glyph that produced it — because that glyph’s coordinates are what the finding was named after.

01210 ms

Ingest

Byte-exact PDF parse. Object streams decoded, xref reconstructed, embedded fonts hashed against the template registry.

producer · xref · fonts

021.4 s

Extract

Text runs recovered with sub-pixel coordinates. Table structure inferred from column occupancy, not ruled lines.

runs · cells · glyphs

032.9 s

Reason

Domain rules run over the run graph: arithmetic identities, template match, glyph metrics, semantic outliers.

markers · rules · verdict

04260 ms

Decide

Findings are ranked by verdict precedence, FAIL before REVIEW before CLEAR, and returned as JSON with a per-finding coordinate box for audit.

verdict · findings · coordinates

SAMPLE · timings from REQ_8FK2 on the rail above. Production timings vary with document, format, and marker set.

§ 03 · CATALOG

Every marker
is a rule with a citation.

01

BALANCE_BREAK

Running balance disagrees with prior balance plus credit minus debit in a reconstructed ledger table.

ARITHMETIC

×FAIL

cites · row · math · box

02

CROSS_PAGE_TOTAL_MISMATCH

Running balance fails to carry forward correctly across a page break.

ARITHMETIC

×FAIL

cites · row · page · box

03

DATE_SEQUENCE_ANOMALY

A row's date is earlier than the row immediately before it in a reconstructed ledger.

SEMANTIC

~REVIEW

cites · row · date · box

04

DUPLICATE_TRANSACTION

Two or more rows share an identical date and amount.

SEMANTIC

~REVIEW

cites · rows · match

05

OCR_LOW_CONFIDENCE

Page classified as needing OCR: its text layer is unreliable or absent.

EXTRACTION

~REVIEW

cites · page · confidence

06

ENCODING_ANOMALY

Broken font encoding or CID mapping detected somewhere in the document.

EXTRACTION

~REVIEW

cites · document · encoding

These are the only six markers the verification engine runs today. No others exist yet.

§ 04 · RUN

One call.
One structured response.

The API is small on purpose. Send a PDF; receive the same finding graph you inspected on the rail. Every field maps back to a rail address.

$ TERMINAL · SAMPLEreq_8fk2

$ curl https://proofmart.shop/v1/verify \
    -H "Authorization: Bearer $PROOFMART_API_KEY" \
    -F "file=@hdfc_apr25.pdf"

↳ 4.8s · verification returned inline · SAMPLE
✗ FAIL · req_8fk2 · 4 findings
   × BALANCE_BREAK             p4·r17
   × CROSS_PAGE_TOTAL_MISMATCH p3→p4
   ~ DUPLICATE_TRANSACTION     p2·r04
   ~ OCR_LOW_CONFIDENCE        p4·r14

STEP 01 · SEND

One multipart POST.

Files up to 50 pages, 20 MB. Timeout 30 s.

STEP 02 · RECEIVE

The full evidence graph.

Every finding carries page, box, expected/found, marker id: every value points back to the rail address you can screenshot.

STEP 03 · DECIDE

Deterministic, not guessed.

No LLM, no scoring model. A fixed precedence, FAIL beats REVIEW beats CLEAR, turns findings into one verdict, every time.

§ 05 · OUTPUTS

The JSON is real.
So is the dossier.

The JSON below is what the API returns today. A signed-in scan can also be exported as an Ed25519-signed PDF dossier your reviewers can countersign, built from the same finding graph — anyone can check that signature back against ProofMart, no account required.

POST /v1/verify → 200 OK

application/json

{
  "document": { "filename": "hdfc_apr25_statement.pdf", "pageCount": 6 },
  "verification": {
    "verdict": "FAIL",
    "findings": [{
      "markerId": "BALANCE_BREAK",
      "verdict": "FAIL",
      "evidence": { "summary": "Running balance differs by -5,000.00",
        "coordinates": [{ "page": 4, "rect": { "x": 548, "y": 528 } }]
      }
    }],
    "documentKind": "bank_statement"
  }
}

req_8fk2.dossier.pdfsigned-in scans only

ProofMart Dossier

REQ_8FK2 · 12 AUG 2026

SUBJECT

hdfc_apr25_statement.pdf

× FAIL4 markers · 2 fail, 2 review

01 · p4

BALANCE_BREAK

Running balance short ₹5,000 on row 17.

02 · p4

CROSS_PAGE_TOTAL_MISMATCH

Balance carried from page 3 to page 4 differs by ₹1,240.

SIGNATURE · ED25519

✓ SIGNED

The JSON above matches the live API response shape. The dossier PDF renders and signs from a saved, signed-in scan at /api/documents/[id]/dossier — anonymous scans aren’t saved, so there’s nothing to sign.

§ 06 · INTEGRATE

Four ways in.
Same engine, every time.

The upload flow above, the public API, webhook delivery, and the CLI all run through the same verification engine — one processing path, not a marketing demo backed by something thinner.

UploadLIVE TODAY

The upload flow on this page. Drop, paste, or pick a PDF and get real findings back, no account required.

APILIVE TODAY

/v1/verify, /v1/inspect, /v1/extract — the same engine this page calls, behind an API key you create at /account/api-keys.

WebhookLIVE TODAY

Register a URL at /account/webhooks and every /v1/verify call delivers an HMAC-signed verification.completed/failed callback, retried on failure.

CLILIVE TODAY

proofmart verify|inspect|extract file.pdf — a small dependency-free client for the same public API, nothing more.

§ 07 · PRICING

Flat monthly.
No per-document surprises.

One plan, one price, a monthly call limit on /v1/verify. No per-finding or per-scan metering.

FREE

₹0/ month

For trying ProofMart against real documents before committing to a plan.

·50 /v1/verify calls / month

·Web upload + JSON findings

·Rail review app

START FREE →

PRORECOMMENDED

₹999/ month

For teams running ProofMart in a review or underwriting loop.

·2,000 /v1/verify calls / month

·Everything in Free

·Priority email support

UPGRADE TO PRO →

Every claimon a document,on the record.

From bytesto bounded evidence.

Every markeris a rule with a citation.

One call.One structured response.

The JSON is real.So is the dossier.

Four ways in.Same engine, every time.

Flat monthly.No per-document surprises.

Every claim
on a document,
on the record.

From bytes
to bounded evidence.

Every marker
is a rule with a citation.

One call.
One structured response.

The JSON is real.
So is the dossier.

Four ways in.
Same engine, every time.

Flat monthly.
No per-document surprises.