diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index ffd9953d..8b4f3926 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "6.1.0-beta.1"
+  ".": "6.1.0-beta.2"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d0a028c8..ef9d8ab1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,26 @@
 # Changelog
 
+## [6.1.0-beta.2](https://github.com/adcontextprotocol/adcp-client-python/compare/v6.1.0-beta.1...v6.1.0-beta.2) (2026-05-24)
+
+
+### ⚠ BREAKING CHANGES
+
+* read `media_buy_status` for lifecycle; `status` is now the task envelope.
+
+### Features
+
+* add webhook proof-of-control helper ([#843](https://github.com/adcontextprotocol/adcp-client-python/issues/843)) ([232f7ef](https://github.com/adcontextprotocol/adcp-client-python/commit/232f7ef6d08e16234b6227ac34f5ba091043a51e))
+* align media-buy responses with AdCP 3.1 ([391dae6](https://github.com/adcontextprotocol/adcp-client-python/commit/391dae6c9c8a753a790aa049970c80205a14309d))
+* **canonical-formats:** public API + v2→v1 projection ([#741](https://github.com/adcontextprotocol/adcp-client-python/issues/741), half 1 of 2) ([#841](https://github.com/adcontextprotocol/adcp-client-python/issues/841)) ([b455e2a](https://github.com/adcontextprotocol/adcp-client-python/commit/b455e2a8dd8197499404d546dfc512da1814e7c4))
+* **canonical-formats:** v1↔v2 reverse + pixel_tracker + narrowing ([#741](https://github.com/adcontextprotocol/adcp-client-python/issues/741), half 2 of 2) ([#845](https://github.com/adcontextprotocol/adcp-client-python/issues/845)) ([37e9225](https://github.com/adcontextprotocol/adcp-client-python/commit/37e92256891892c923e303acf73a5a9fee904090))
+* **examples:** dual-emit v1 format_ids + v2 format_options on reference seller ([#847](https://github.com/adcontextprotocol/adcp-client-python/issues/847)) ([7731f53](https://github.com/adcontextprotocol/adcp-client-python/commit/7731f53dc0ec82d60938b8467b16cce63f91e1c1)), closes [#741](https://github.com/adcontextprotocol/adcp-client-python/issues/741)
+
+
+### Bug Fixes
+
+* harden media buy response normalization ([5defa15](https://github.com/adcontextprotocol/adcp-client-python/commit/5defa15a51ad12cb89b0efbded726dbc2568bf40))
+* harden media buy response normalization ([532459a](https://github.com/adcontextprotocol/adcp-client-python/commit/532459aed2fb4e5da9be58bdee43585529e5dbbf))
+
 ## [6.1.0-beta.1](https://github.com/adcontextprotocol/adcp-client-python/compare/v6.0.0-beta.1...v6.1.0-beta.1) (2026-05-23)
 
 
diff --git a/pyproject.toml b/pyproject.toml
index 6b015931..6e10cdc8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "adcp"
-version = "6.1.0b1"
+version = "6.1.0b2"
 description = "Official Python client for the Ad Context Protocol (AdCP)"
 authors = [
     {name = "AdCP Community", email = "maintainers@adcontextprotocol.org"}