A supplier emails you a purchase order. It's on official letterhead, signed by their finance contact, and looks completely legitimate. But is it? Right now, you'd have to pick up the phone and call to be sure. That's how most business still works today — trust, but verify by phone.
Now think about a registered letter. When one arrives, you don't wonder if it's real. The sender is identified, the envelope is sealed, the delivery is tracked and stamped with a date. You have proof of who sent it and that nobody opened it along the way. We solved this problem for paper — a century ago.
Then everything moved to email, and we quietly gave that up. Any PDF can claim to be from anyone. Any number in it can be changed on the way. The scammers noticed long before the rest of us did.
When a company sends you a document, a tiny companion file travels alongside it — carrying a seal that only they could have made. Your computer checks it in seconds: who sealed it, when, and whether a single byte has changed since. If the document was tampered with, the seal breaks. Loudly.
And because a perfect seal from a stranger is still a stranger, TrustDID asks a second question no envelope ever could: does someone you trust vouch for the sender? Your organization keeps a list — your approved suppliers on it, everyone else off it. The math proves the document; people prove the relationship.
And it's nobody's business but yours
Your documents never leave your computer — sealing and checking happen locally, on your machine. No uploads, no middleman reading your contracts, no central authority to depend on. Engineered in Canada, built on open standards, ready for the quantum era.
We should expect every important document to be verifiable — the way we expect a registered letter to be. That expectation is what we're building.