Stamp & Verify

Drop here a file to stamp
OR
an .ots proof file to verify

The hash is calculated on your browser preserving your privacy. More...
Timestamping proof download will start automatically after uploading document.

In the underground, a quiet rebellion against Zone-H’s decline has emerged: (formerly known as "Zone-H Unattended"). This project, run by a collective of independent security researchers, uses modern containerized crawlers to scrape defacement mirrors from around the world.

Zone-H is an archive that records website defacements—incidents where a hacker changes the visual appearance of a site. Alternatives provide similar services, often with faster mirror times, different verification methods, or specialized focuses (such as government or high-traffic sites). 1. Mirror-H (mirror-h.org) zone-h alternative

: Clean UI and faster verification times compared to the sometimes-backlogged Zone-H system. 4. DarkMirror In the underground, a quiet rebellion against Zone-H’s

Python

Javascript

Java


$ pip3 install opentimestamps-client
$ ots stamp my-file


$ npm install -g javascript-opentimestamps
$ ots-cli.js stamp my-file


$ git clone https://github.com/opentimestamps/java-opentimestamps
$ cd java-opentimestamps
$ mvn install
$ java -jar target/OtsCli.jar stamp my-file

Calendars

The following are the, free to use, default calendars used by OpenTimestamps. They rely on donations to reduce maintainers efforts, they accept bitcoin and some accept lightning network payments. Check the calendars uptime.

Alice

Bob

Finney

Catallaxy

Zone-h Alternative Upd Jun 2026

: Clean UI and faster verification times compared to the sometimes-backlogged Zone-H system. 4. DarkMirror

Zone-h Alternative Upd Jun 2026

OpenTimestamps aims to be a standard format for blockchain timestamping.

Stamp & Verify

Stamp & Verify

Timestamp of

Calendars

Zone-h Alternative Upd Jun 2026

Repositories