Observed arrival · 2026-10-22

StampThisFile turns file fingerprints into Bitcoin timestamps

stampthisfile.com Visit website

Editorial interest 78/100 Selection signal · not a rating of the site

A browser-based service hashes a file locally and creates an OpenTimestamps proof that can later be checked independently.

Landing page captured for the 2026-10-22 issue.

For: People needing independently verifiable file timestamps
Worth noticing: The service returns ordinary .ots proofs, which the page says can still be verified if its own service disappears.

Field notes

The page describes a pipeline from local SHA-256 hashing through a Merkle-tree commitment to an OpenTimestamps calendar and, eventually, a Bitcoin block. Its developer section shows a one-call API flow using x402 payment, with batches of up to 100 hashes. The service says completed proofs can arrive through a signed webhook; the extracted page does not verify that delivery in practice.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

$PaidCommerce or pricing visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

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