From June 15th, 2018, our TSA service will be provided by Safe Stamper. New timestamps will be published on Safe Stamper’s TSA information page:

This is Safe Creative Timestamping Authority (TSA) server.
All timestamps are published in real time and you can search for any timestamped hash to check the validity of its timestamp.

You can use the service for free, sending a RFC 3161 standard timestamp request to Free service is limited to 5 timestamps per day and IP.
If you want to use this service commercially, you can access it through Safe Stamper TSA.
The digital timestamping certificate is available to download from the next url address:

TSA Policy