Assuming it's base64 encoded, what is the data structure and internal encoding?
Discussion
It's the base64 encoded cbor serialization of a data structure made like this:
```
{
"epoch":
"event": "BURN"|"MINT",
"contents": Array
}
```
Where contents contains either the hex encoded signature C or the hex encoded blind signature B_
Every 5 seconds a background worker scoops up accumulated proofs or blinded signatuees and posts a note.