diff --git a/content/en/verifying/verify.md b/content/en/verifying/verify.md
index ff0ba9a6..03ac61e9 100644
--- a/content/en/verifying/verify.md
+++ b/content/en/verifying/verify.md
@@ -80,12 +80,24 @@ $ cosign verify --certificate cosign.crt --certificate-chain chain.crt user/demo
 ```
 
 ## Verify image with user-provided trusted chain
-Verify image with the provided certificate chain and identity parameters (intended for
-a "bring your own PKI" use case):
-
+Verify image with the provided certificate chain(s) and identity parameters (intended for
+a "bring your own PKI" use cases).
+* with a single certificate chain file - which may contain one or several intermediate
+certificates followed by the root CA certificate - use the `--certificate-chain` parameter:
 ```shell
 $ cosign verify --certificate-chain chain.crt --certificate-oidc-issuer https://issuer.example.com --certificate-identity foo@example.com user/demo
 ```
+* with a certificate bundle PEM file containing several CA roots (but no intermediate certificate), use the `--ca-roots` parameter:
+```shell
+$ cosign verify --ca-roots ca-roots.pem --certificate-oidc-issuer https://issuer.example.com --certificate-identity foo@example.com user/demo
+```
+
+The `--ca-roots` and `--certificate-chain` flags are mutually exclusive.
+
+Note that the hypothetical use case of "multiple chains with multiple CA roots and intermediate
+certificates" is not yet supported.  There are plans to add the `--ca-intermediates` parameter
+(see [issue #3462](https://github.com/sigstore/cosign/issues/3462)), if you needs this,
+please open an issue and mention it on the Sigstore #cosign Slack.
 
 ## Verify an image on the transparency log