↳ In-reply-to » Trying to sum up the current proposal (keeping hashes):

The important bits missing from this summary (devil is in the details) are two requirements:

• Clients should order Twts by their timestamp.
  
• Clients must validate all edit and delete requests that the hash being indicated belongs to and came from that feed.
  
• Client should honour delete requests and delete Twts from their cache/archive.