Quantum Notary — offline verifier
Three separate checks, each saying only what it can prove: whether a file you kept is the file a Quantum Notary record was made from; whether that record’s fingerprint really is anchored on Base at the place its proof names; and whether a receipt was signed by the service. This page runs on your own machine.
What was checked
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Because the self-test failed, this tool will not give you a verdict. That is deliberate: a tool that cannot prove its own arithmetic could tell you an intact file had been altered.
Compute your file’s fingerprint
Nothing is uploaded. The file is read on this machine and never leaves it.
Drag a file here, or
My record was made from typed text, not a file
No trailing newline is added. A single extra character — including an invisible one pasted from a document — produces a completely different fingerprint.
Compare with the record
This is printed on the proof report as “Input Processing”.
Confirm the fingerprint is anchored on Base
This is the only check that uses the network. The tool asks two independently operated public Base nodes for the transaction, its receipt, and its block, and accepts a positive answer only when both agree and every fact matches what this release of the service requires: the right network, a successful mined receipt, the relayer this release names for that block, a zero-value type-2 self-transfer, and your fingerprint at exactly the position your proof claims.
The proof names the transaction, the block, and the position your fingerprint occupies. This tool never searches for a position the proof did not claim.
What was asked, and of whom
A second node from a different operator is always asked as well. None of these nodes is run by Quantum Notary. One node, however consistent, can only ever be reported; two independent nodes agreeing is what this tool calls verified.
I only have the transaction’s input bytes (no network)
Pasted bytes are whatever was pasted. This tool can tell you where your fingerprint sits inside them and nothing more — it is not a chain check and never reads as one.
Leave the position empty to have the tool report where the fingerprint occurs, if it does.
Check the receipt’s signature
A signed acceptance receipt records that the service accepted your request. It is not transaction-inclusion proof; step 3 is. This tool calls a receipt Quantum Notary evidence only when it verifies under a key from the registered key set embedded in this release and carries the exact acceptance-receipt claims. A key you paste yourself proves only that the receipt and that key belong together.