We had left off that @Sign works as a "digital notary" (you can see how it works in my previous post here:
How is it used in practice and what happens if I lose access?
Step by step:
Search for it online: Type sign.global in your browser.
Connect your wallet: You can use your Binance Web3 Wallet or whichever you prefer.
Upload the file: You upload the document you want to protect (contract, photo, certificate).
Sign the registration: By clicking "Sign", the network generates a unique digital fingerprint of that file and stores it forever.
What if I lose the code?
There is nothing to lose. The "key" is your own file. If tomorrow you need to prove that this document is real, you only have to re-upload the original to the platform. The system will recognize its fingerprint and show you the certificate with the exact date of the original registration.
What is the cost?
The good news is that it is much cheaper than an official notary.
How is it paid? You pay a small network commission (Gas Fee) in the currency of the network you choose (for example, a few cents of BNB if you use the Binance network).
Is it always paid? It is paid just once. Once sealed, the registration is eternal. There are no fees or renewals.
What do you gain?
The peace of mind of having an unalterable backup. Whatever happens, you have a technical and public proof that your document existed at that exact moment and was not modified.