diff --git a/crates/claims/crates/data-integrity/core/src/proof/de/mod.rs b/crates/claims/crates/data-integrity/core/src/proof/de/mod.rs
index 0c06af06c..0c00075cd 100644
--- a/crates/claims/crates/data-integrity/core/src/proof/de/mod.rs
+++ b/crates/claims/crates/data-integrity/core/src/proof/de/mod.rs
@@ -14,7 +14,7 @@ use serde::{
     de::{DeserializeSeed, MapAccess},
     Deserialize,
 };
-use ssi_core::de::WithType;
+use ssi_core::{de::WithType, OneOrMany};
 use std::{collections::BTreeMap, marker::PhantomData};
 
 mod field;
@@ -54,7 +54,7 @@ impl<'de, T: DeserializeCryptographicSuite<'de>> Proof<T> {
         let mut verification_method = None;
         let mut proof_purpose = None;
         let mut expires: Option<xsd_types::DateTime> = None;
-        let mut domains = None;
+        let mut domains: Option<OneOrMany<String>> = None;
         let mut challenge = None;
         let mut nonce = None;
 
@@ -105,7 +105,7 @@ impl<'de, T: DeserializeCryptographicSuite<'de>> Proof<T> {
             proof_purpose: proof_purpose
                 .ok_or_else(|| serde::de::Error::custom("missing `proofPurpose` property"))?,
             expires: datetime_to_utc_datetimestamp(expires),
-            domains: domains.unwrap_or_default(),
+            domains: domains.map(|d| d.into_vec()).unwrap_or_default(),
             challenge,
             nonce,
             options,
diff --git a/crates/claims/crates/data-integrity/core/src/proof/mod.rs b/crates/claims/crates/data-integrity/core/src/proof/mod.rs
index 660462792..abb898567 100644
--- a/crates/claims/crates/data-integrity/core/src/proof/mod.rs
+++ b/crates/claims/crates/data-integrity/core/src/proof/mod.rs
@@ -48,10 +48,7 @@ pub struct Proof<S: CryptographicSuite> {
     pub type_: S,
 
     /// Date a creation of the proof.
-    #[serde(
-        deserialize_with = "de::deserialize_datetime_utc",
-        skip_serializing_if = "Option::is_none"
-    )]
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub created: Option<xsd_types::DateTimeStamp>,
 
     /// Verification method.
@@ -62,10 +59,7 @@ pub struct Proof<S: CryptographicSuite> {
     pub proof_purpose: ProofPurpose,
 
     /// Specifies when the proof expires.
-    #[serde(
-        deserialize_with = "de::deserialize_datetime_utc",
-        skip_serializing_if = "Option::is_none"
-    )]
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub expires: Option<xsd_types::DateTimeStamp>,
 
     #[allow(rustdoc::bare_urls)]
diff --git a/crates/claims/crates/data-integrity/src/core_tests.rs b/crates/claims/crates/data-integrity/src/core_tests.rs
new file mode 100644
index 000000000..8fe77075d
--- /dev/null
+++ b/crates/claims/crates/data-integrity/src/core_tests.rs
@@ -0,0 +1,20 @@
+use super::*;
+
+#[test]
+fn single_domain_de_serialization() {
+    let json_proof = serde_json::json!(
+        {
+            "type": "DataIntegrityProof",
+            "cryptosuite": "ecdsa-rdfc-2019",
+            "created": "2024-12-18T10:31:42.962679Z",
+            "verificationMethod": "did:jwk:eyJjcnYiOiJQLTI1NiIsImt0eSI6IkVDIiwieCI6IndPTjRDTmlHX1BxaWl1R0JEbnpRa1lqVG9jaDJnaTRBTHluWVIwdnN1c0kiLCJ5Ijoia2JlZ25iRzUxZHFETW9wdHgtOVIxcmpIU1B6TkhYLWdQbnFhbWJ6a1pzNCJ9#0",
+            "proofPurpose": "authentication",
+            "domain": "https://qa.veresexchanger.dev/exchangers/z19vRLNoFaBKDeDaMzRjUj8hi/exchanges/z19jYTCujFf4b6JFdCNMTXJ3s/openid/client/authorization/response",
+            "challenge": "z19jYTCujFf4b6JFdCNMTXJ3s",
+            "proofValue": "z3H5Bi3cF6BGEgoWdAqp13gQHEibVGtNtVbJECwfQStGmBio1gmjHrq2TGtjJ3L18pd1pKCsb4Pos9oMDpginN68h"
+        }
+    );
+    let proof: Proof<AnySuite> =
+        serde_json::from_value(json_proof.clone()).expect("Could not deserialize");
+    assert_eq!(json_proof, serde_json::to_value(&proof).unwrap());
+}
diff --git a/crates/claims/crates/data-integrity/src/lib.rs b/crates/claims/crates/data-integrity/src/lib.rs
index 2681c6021..c97f7c841 100644
--- a/crates/claims/crates/data-integrity/src/lib.rs
+++ b/crates/claims/crates/data-integrity/src/lib.rs
@@ -5,6 +5,9 @@ pub use ssi_data_integrity_suites as suites;
 mod any;
 pub use any::*;
 
+#[cfg(test)]
+mod core_tests;
+
 /// Any Data-Integrity proof known by this library.
 pub type AnyProof = Proof<AnySuite>;