The problem with 'just trust us'
Any registry could promise its records are accurate. The hard part is letting people confirm that without having to trust the registry itself. Tamper-evidence is the answer: build the system so that any change to a record leaves visible, checkable evidence.
Signatures make certificates forgery-proof
Each certificate is signed with a cryptographic key, and the matching public key is published openly. Anyone can check that a certificate was signed by that key and hasn't been altered since. Change a single character and the signature no longer validates — so a forged or edited certificate simply fails the check.
Append-only history you can't rewrite
The record is an append-only ledger: entries are permanent, and new information is added as new entries. Each entry is linked to the one before it, so removing or altering an earlier event would break the chain and be detectable. Corrections are made as visible additions, never as silent edits.
A daily fingerprint anyone can check
Once a day, the registry condenses its records into a single fingerprint — a Merkle root — and publishes it. A short inclusion proof lets anyone confirm that a specific record was part of that published state, recomputed in their own browser. If a record were changed after the fact, it would no longer match the fingerprint.
An independent clock — the honest bit
To stop the registry from quietly back-dating its own fingerprint, that fingerprint is timestamped using OpenTimestamps, which commits it into the Bitcoin blockchain. Here the blockchain is used purely as a public, tamper-resistant clock — there is no token, no wallet, and no cost to anyone verifying. It simply provides a timestamp the registry itself can't fake.
What 'no crypto, no blockchain' means for you
As a user, you never touch a coin, a wallet, or a chain. You scan a QR code or open a link and the checks happen for you. 'No crypto, no blockchain' describes your experience honestly — the cryptography and the public clock work in the background so you don't have to think about them.
Tamper-evident, not tamper-proof
No system makes records physically impossible to alter. The goal is that any alteration is detectable by anyone — the way a broken wax seal reveals interference. That's what signatures, append-only history, and anchoring achieve together.