VaultStamp
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witness onlineday — of the epoch

Witness for all things made, owed and chosen.

VaultStamp fingerprints a work, a bill, a vote or a likeness, signs the moment it existed, and keeps that proof checkable by anyone, long after the people and the companies involved are gone.

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vaultstamp / witnesslistening
›witness master_take_07.wav
fingerprint sha256 9f2c4a71e0b8…f5e7c04
kind authorship / audio
declared composed by Ilse Marr. no generative AI.
witnessed 2026-11-09 23:14:07Z + rfc3161
sealed r_8k2m4q9z1x7c5v3b
›
An example session: VaultStamp witnesses a song, an invoice, a ballot and a likeness, then verifies the invoice.

An illustrative session. People stamp from the app; systems and agents use the same API.

Anything that must be shown to have happened.

One layer of proof under everything people make, owe and decide. The stamp type sets what each record must declare; the seal and the receipt work the same for all of them.

  • AuthorshipA track, a manuscript, a design, a photographThat this exact work existed, held by you, at that moment.
  • ObligationInvoices, bills, contracts, delivery notesWhat was agreed or owed, and that no one edited it afterwards.
  • ChoiceVotes, approvals, consentThat it was cast and counted, without revealing what it said.
  • LikenessA face, a voice, a signature styleWho may use it, under which terms, approved by the person.
  • ObservationLab readings, field photos, inspectionsThat the record is the one taken, not a later version.
  • ReleaseSoftware builds, datasets, model weightsWhich bytes shipped, and when.

How a thing is witnessed.

Three steps, the same for a song or a ballot. Only the fingerprint ever has to leave your hands.

  1. 1 of 3

    Fingerprint

    The thing is reduced to a SHA-256 fingerprint on your own device. Change one byte and the fingerprint changes. The original goes into your vault, or nowhere at all.

  2. 2 of 3

    Witness

    VaultStamp signs a receipt holding the fingerprint, the exact moment, who stamped it and what they declared. An outside timestamp authority countersigns the time.

  3. 3 of 3

    Verify

    Anyone, at any later date, drops the file or opens the receipt. The mathematics matches or it doesn't. No account and no trust in us required.

Every thing gets a seal no other thing can have.

The seal is drawn from the fingerprint itself, the way an engraved rosette marks a banknote. The same bytes always draw the same seal; one changed byte draws another. Try it with any file. Nothing leaves your device.

Made to be checked long after us.

An open receipt
Canonical JSON (RFC 8785) signed with ES256. Any standard library can check it, today or in a century.
Time from outside
Every stamp also carries an RFC 3161 timestamp from an independent authority, so the moment doesn't rest on our word.
Evidence that stands alone
The evidence pack verifies offline with ordinary tools. If VaultStamp disappeared, the proof would not.
Write-once storage
Originals are kept versioned and locked against deletion. The signing key never leaves its hardware module.

Who keeps records here.

What is witnessed here stays witnessed.

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