diff --git a/Cargo.lock b/Cargo.lock
index 61928c7..d760e80 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1684,6 +1684,7 @@ dependencies = [
  "parity-scale-codec",
  "polkadot-overseer",
  "sc-client-api",
+ "serde",
  "sp-api",
  "sp-blockchain",
  "sp-state-machine",
diff --git a/client/orchestrator-chain-interface/Cargo.toml b/client/orchestrator-chain-interface/Cargo.toml
index b0293b0..ceb5f9c 100644
--- a/client/orchestrator-chain-interface/Cargo.toml
+++ b/client/orchestrator-chain-interface/Cargo.toml
@@ -13,6 +13,7 @@ async-trait = { workspace = true }
 futures = { workspace = true }
 jsonrpsee = { workspace = true }
 parity-scale-codec = { workspace = true }
+serde = { workspace = true }
 thiserror = { workspace = true }
 
 # Dancekit
diff --git a/client/orchestrator-chain-interface/src/lib.rs b/client/orchestrator-chain-interface/src/lib.rs
index 7b40211..11db791 100644
--- a/client/orchestrator-chain-interface/src/lib.rs
+++ b/client/orchestrator-chain-interface/src/lib.rs
@@ -25,8 +25,15 @@
 //! prove_read: generates a storage proof of a given set of keys at a given Orchestrator parent
 
 use {
-    core::pin::Pin, dp_core::ParaId, futures::Stream, polkadot_overseer::Handle,
-    sc_client_api::StorageProof, sp_api::ApiError, sp_state_machine::StorageValue, std::sync::Arc,
+    core::pin::Pin,
+    dp_core::ParaId,
+    futures::Stream,
+    parity_scale_codec::{Decode, Encode},
+    polkadot_overseer::Handle,
+    sc_client_api::StorageProof,
+    sp_api::ApiError,
+    sp_state_machine::StorageValue,
+    std::sync::Arc,
 };
 pub use {
     cumulus_primitives_core::relay_chain::Slot,
@@ -91,6 +98,23 @@ impl From<Box<dyn sp_state_machine::Error>> for OrchestratorChainError {
 // TODO: proper errors
 pub type OrchestratorChainResult<T> = Result<T, OrchestratorChainError>;
 
+pub type DataPreserverProfileId = u64;
+
+// Copy of Tanssi's pallet_data_preservers_runtime_api::Assignment
+#[derive(
+    Debug, Copy, Clone, PartialEq, Eq, Encode, Decode, serde::Serialize, serde::Deserialize,
+)]
+pub enum DataPreserverAssignment<ParaId> {
+    /// Profile is not currently assigned.
+    NotAssigned,
+    /// Profile is activly assigned to this ParaId.
+    Active(ParaId),
+    /// Profile is assigned to this ParaId but is inactive for some reason.
+    /// It may be causes by conditions defined in the assignement configuration,
+    /// such as lacking payment.
+    Inactive(ParaId),
+}
+
 /// Trait that provides all necessary methods for interaction between collator and orchestrator chain.
 #[async_trait::async_trait]
 pub trait OrchestratorChainInterface: Send + Sync {
@@ -147,6 +171,12 @@ pub trait OrchestratorChainInterface: Send + Sync {
     async fn best_block_hash(&self) -> OrchestratorChainResult<PHash>;
 
     async fn finalized_block_hash(&self) -> OrchestratorChainResult<PHash>;
+
+    async fn data_preserver_active_assignment(
+        &self,
+        orchestrator_parent: PHash,
+        profile_id: DataPreserverProfileId,
+    ) -> OrchestratorChainResult<DataPreserverAssignment<ParaId>>;
 }
 
 #[async_trait::async_trait]
@@ -227,4 +257,14 @@ where
     async fn finalized_block_hash(&self) -> OrchestratorChainResult<PHash> {
         (**self).finalized_block_hash().await
     }
+
+    async fn data_preserver_active_assignment(
+        &self,
+        orchestrator_parent: PHash,
+        profile_id: DataPreserverProfileId,
+    ) -> OrchestratorChainResult<DataPreserverAssignment<ParaId>> {
+        (**self)
+            .data_preserver_active_assignment(orchestrator_parent, profile_id)
+            .await
+    }
 }
diff --git a/container-chain-primitives/authorities-noting-inherent/src/tests.rs b/container-chain-primitives/authorities-noting-inherent/src/tests.rs
index eafcc19..133d595 100644
--- a/container-chain-primitives/authorities-noting-inherent/src/tests.rs
+++ b/container-chain-primitives/authorities-noting-inherent/src/tests.rs
@@ -27,7 +27,8 @@ use {
     },
     cumulus_relay_chain_interface::{PHash, PHeader, RelayChainInterface, RelayChainResult},
     dc_orchestrator_chain_interface::{
-        BlockNumber, ContainerChainGenesisData, OrchestratorChainInterface, OrchestratorChainResult,
+        BlockNumber, ContainerChainGenesisData, DataPreserverAssignment, DataPreserverProfileId,
+        OrchestratorChainInterface, OrchestratorChainResult,
     },
     dp_core::{well_known_keys, Header as OrchestratorHeader},
     futures::Stream,
@@ -163,6 +164,14 @@ impl OrchestratorChainInterface for DummyOrchestratorChainInterface {
     async fn finalized_block_hash(&self) -> OrchestratorChainResult<PHash> {
         unimplemented!("Not needed for test")
     }
+
+    async fn data_preserver_active_assignment(
+        &self,
+        _orchestrator_parent: PHash,
+        _profile_id: DataPreserverProfileId,
+    ) -> OrchestratorChainResult<DataPreserverAssignment<ParaId>> {
+        unimplemented!("Not needed for test")
+    }
 }
 
 #[async_trait]