diff --git a/03.md b/03.md
index 4faf3f1..680cc8b 100644
--- a/03.md
+++ b/03.md
@@ -13,7 +13,6 @@ This NIP defines an event with `kind:1040` that can contain an [OpenTimestamps](
   "kind": 1040
   "tags": [
     ["e", <event-id>, <relay-url>],
-    ["block", <block-height-as-string>, <block-hash>],
     ["alt", "opentimestamps attestation"]
   ],
   "content": <base64-encoded OTS file data>
@@ -21,7 +20,6 @@ This NIP defines an event with `kind:1040` that can contain an [OpenTimestamps](
 ```
 
 - The OpenTimestamps proof MUST prove the referenced `e` event id as its digest.
-- The `block` tag is optional, it exists to establish a minimum date since which the given event has existed.
 - The `content` MUST be the full content of an `.ots` file containing at least one Bitcoin attestation. This file SHOULD contain a **single** Bitcoin attestation and no reference to "pending" attestations since they are useless in this context.
 
 ### Example OpenTimestamps proof verification flow
diff --git a/07.md b/07.md
index 0c8c402..a9b6b34 100644
--- a/07.md
+++ b/07.md
@@ -34,3 +34,4 @@ async window.nostr.nip04.decrypt(pubkey, ciphertext): string // takes ciphertext
 - [TokenPocket](https://www.tokenpocket.pro/) (Android, IOS, Chrome and derivatives)
 - [Nostrmo](https://github.com/haorendashu/nostrmo_faq#download) (Android, IOS)
 - [Spring Browser](https://spring.site) (Android)
+- [nodestr](https://github.com/lightning-digital-entertainment/nodestr) (NodeJS polyfill)