To me, that's a sign of low collaboration and low trust. If your team does regular retrospectives, I'd just say, "Look, I feel like in stand-ups, I keep having to justify my existence. Do other people feel that? What can we change to make that better?"

Off the top of my head, I'd look at the size of the unit of work and the length of the release cycle. I think Agile processes work best when the work is broken down into lots of small deliverables that meet the INVEST criteria:

http://en.wikipedia.org/wiki/INVEST_%28mnemonic%29

If the team is jointly completing a few shippable things a day, then everybody should have a pretty good idea that everybody else is working. Doubly so if those are actually getting released daily.

If I haven't made any progress since the last day, I just talk about what I plan to do for the upcoming day. I also might say "I'm still working on (the thing I was working on yesterday)". With a well functioning, trusting team that should be a perfectly reasonable thing to say every so often.