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.
Websites like Internet Archive or various "IPA Libraries" host collections of old apps. For example, a user named "daguil" has archived an old Instagram 1.19.9 IPA, though note that this is an extremely old beta version that almost certainly will not connect to modern servers.
If the App Store method fails, you can try to find and sideload an older .IPA file. However, finding verified, safe versions for such an old iOS is difficult, and many features (like Reels or Stories) may not work.
As of early 2026, reports indicate that even previously working older versions of Instagram have stopped functioning on iOS 9.3.5/9.3.6 devices, often logging users out immediately or failing to load content. Instagram Ipa Ios 9.3 5 Download
This creates a lightweight shortcut icon on your desktop that functions similarly to an app, utilizes modern web protocols, and ensures you can access your feed without dealing with installation certificates or app crashes.
You must find an archive of older iOS apps. Look for Instagram versions released around 2016–2017, as these were the last versions to support iOS 9. Websites like Internet Archive or various "IPA Libraries"
Use a service like Signulous or AppDB Pro ($20/year) to sign the app for 365 days.
As Alex continued to use Instagram on his vintage device, he discovered a community of like-minded individuals who shared his passion for retro tech. They discussed various ways to breathe new life into old iOS devices, from sideloading IPA files to installing custom firmware. However, finding verified, safe versions for such an
Python
Javascript
Java
$ pip3 install opentimestamps-client
$ ots stamp my-file
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$ npm install -g javascript-opentimestamps
$ ots-cli.js stamp my-file
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$ git clone https://github.com/opentimestamps/java-opentimestamps
$ cd java-opentimestamps
$ mvn install
$ java -jar target/OtsCli.jar stamp my-file
More
Websites like Internet Archive or various "IPA Libraries" host collections of old apps. For example, a user named "daguil" has archived an old Instagram 1.19.9 IPA, though note that this is an extremely old beta version that almost certainly will not connect to modern servers.
If the App Store method fails, you can try to find and sideload an older .IPA file. However, finding verified, safe versions for such an old iOS is difficult, and many features (like Reels or Stories) may not work.
As of early 2026, reports indicate that even previously working older versions of Instagram have stopped functioning on iOS 9.3.5/9.3.6 devices, often logging users out immediately or failing to load content.
This creates a lightweight shortcut icon on your desktop that functions similarly to an app, utilizes modern web protocols, and ensures you can access your feed without dealing with installation certificates or app crashes.
You must find an archive of older iOS apps. Look for Instagram versions released around 2016–2017, as these were the last versions to support iOS 9.
Use a service like Signulous or AppDB Pro ($20/year) to sign the app for 365 days.
As Alex continued to use Instagram on his vintage device, he discovered a community of like-minded individuals who shared his passion for retro tech. They discussed various ways to breathe new life into old iOS devices, from sideloading IPA files to installing custom firmware.
Client
Client tool to perform stamping of files through a calendar server and to verify OpenTimestamps proof
opentimestamps-clientServer
Calendar Server receiving timestamp request from clients
opentimestamps-serverPython
Common library
python-opentimestampsJavascript
Common library & Client tool
javascript-opentimestampsJava
Common library & Client tool
java-opentimestampsRust
Rust library
rust-opentimestamps