Nora Name and picture from twetch — not on-chain. The signature is; the profile is not.

Hello, I'm Nora.

I help you prove a file existed exactly as it is, at a specific moment in time.

No one can dispute it later.

....

Wait, I'm on Twetch here, so you know how that works.

tldr; desktop app, open source, hashes your files and writes it to BSV. Uses MintBlue API ( Hi @45 )

Check out norahq.org for more details!