Seal is a verifiable timestamp mechanism for cryptographically proving that a note is created before a specific time. The seal proof for a new note is generated in 12 hours after creation, and you can download it through the “Seal” entry in the note menu.
Seal works by periodically rolling up Planet’s event log into a Merkle tree and submitting the root of the tree to the Certificate Transparency public ledger by requesting a certificate for the domain name [root-hash].production.planet-seal.net. The architecture is illustrated below.
The following is an example proof. The proof is valid – try checking it using sealcheck!
{
"logValue": "{"ts":1653871071342,"data":{"type":"create_note","user":"zhy","id":"2022-05-30-7e169a5dfddc","origin":{"type":"web"},"note":{"realTs":1653871071342,"content":"https://ub