[AffableSpatula]

Great question! :) Right now the UI for creating deeds is from author to owner. We will add the interface for owners to sign on ownership with further deeds in the future. This felt like a feature to leave out for early launch.

[powerapple]

Hope you don't mind me asking: How do you solve the double spending problem without a blockchain?

[AffableSpatula]

The database is postgres under the hood which provides atomicity. We verify the signature of signed pieces (and signed deeds) and then commit the transaction to postgres with a digest of the content (which has a unique constraint on it) - this along with the atomic guarantee ensures there can be no double spend of signed messages.