Commons / CertLedger
Two documents. Exact bytes.
Choose the original digitally signed PDF and the related letter or email. Inspect them locally, retain their fingerprints, and prepare a hash for Chisel.
Files stay in this tab. Nothing is uploaded, rewritten, signed or sent.
Document 1
Original signed PDF
Use the original signature-bearing file, rather than a scan or a new print-to-PDF copy.
No PDF selected.
PDF metadata and signature details
No inspection yet.
Document 2
Related correspondence
Choose your saved email (.eml), letter PDF or other source file. Preserve the version actually sent.
No correspondence selected.
Correspondence metadata
No inspection yet.
PDF inspection extracts document properties, signature dictionaries, byte ranges and readable embedded certificate details. It does not verify the digital signature, the certificate's trust or revocation, or email delivery. Declared names and dates are source metadata. Files up to 64 MiB are supported.
Prepare a public fingerprint
What should the hash identify?
Choose the original PDF to begin. You can add the correspondence later.
- CertLedger Thunderword
- LMxCERTLEDGERzzzzzzzzzzzzzzzWTMCKs
- SHA-256
- Not prepared.
- OP_RETURN ASCII
- Not prepared.
- Payload size
- —
Select a file to calculate its SHA-256.
Chisel mirror
Use another Chisel static mirror if needed. The handoff carries only the digest in the URL fragment. Filenames, email headers, PDF metadata and file bytes are excluded.
Keep the artifacts separate
Document 1 is the exact signed source. Document 2 is the related correspondence. Each has its own SHA-256. A downloaded pair record connects them; its hash identifies that record, rather than either source file.
The default transaction payload identifies Document 1. To anchor the correspondence separately, select Document 2 and prepare another transaction. To commit to both in one hash, select the pair record and retain the downloaded record with the originals.
A hash commitment provides a reference for checking exact bytes later. It does not itself establish who sent or received a letter, a document's original date, or the truth of its contents.