diff --git a/README.md b/README.md
index 86166ae..45ea3bd 100644
--- a/README.md
+++ b/README.md
@@ -4,9 +4,14 @@
 [OpenTimestamps is a service which provides provable timestamping using the Bitcoin
 blockchain](https://petertodd.org/2016/opentimestamps-announcement)
 
-This library is in very early stages and currently supports parsing and verification
-of `.ots` files, but not serialization. Work needs to be done to support this, and
-also to create documentation and examples.
+This library is in early stages. It currently supports parsing and serialization
+of `.ots` files, and can play them forward to compute the eventual hashes that
+actually wind up in the chain.
+
+There is lots of remaining work to do as far as documentation and examples.
+
+A timestamp viewer using this library is available at [wpsoftware.net](https://www.wpsoftware.net/ots/).
+Its [source code is here](https://github.com/apoelstra/ots-viewer).
 
 In `src/bin/ots_info.rs` there is a simple application that reads a `.ots` file and
 dumps its contents to stdout, as a basic usage example. It really just calls