Nebula records the important moments of your project, an agreement locked, a milestone met, a change signed, to a tamper-evident record kept on two independent chains at once: one public, and one operated by Nebula. Because the same proof is written to both, neither can rewrite history on its own.
Why two records, not one
A single record is a single point of authority. Writing the same proof to two independent ledgers means it still holds even if one of them is lost or compromised. Anyone checking a proof checks both; if they disagree, the proof is rejected.
What "verified" means
When a Nebula surface shows "verified", it means:
- The record exists with the expected fingerprint on both chains.
- The timestamps on both agree, within tolerance.
- The signature traces back to the organisation and the person who signed.
If any of those fail, the surface reads "unverified" or "invalid".
Reading a proof
Open any anchored item and you will see its proof: the two chain references, the signing fingerprint, the timestamps, and the exact record that was sealed. Your counterparty can confirm the same proof without a Nebula account.