diff --git a/internal/resultstore/result.go b/internal/resultstore/result.go
index 40b50a33..988e2aa3 100644
--- a/internal/resultstore/result.go
+++ b/internal/resultstore/result.go
@@ -1,24 +1,12 @@
 package resultstore
 
+import "github.com/ossf/package-analysis/pkg/api/pkgecosystem"
+
 // Pkg describes the various package details used to populate the package part
 // of the analysis results.
 type Pkg interface {
+	Ecosystem() pkgecosystem.Ecosystem
 	EcosystemName() string
 	Name() string
 	Version() string
 }
-
-// pkg is an internal representation of a Pkg, which can be marshalled into JSON.
-type pkg struct {
-	Ecosystem string `json:"Ecosystem"`
-	Name      string `json:"Name"`
-	Version   string `json:"Version"`
-}
-
-// DynamicAnalysisRecord is the top-level struct which is serialised to produce JSON results files
-// for dynamic analysis
-type DynamicAnalysisRecord struct {
-	Package          pkg   `json:"Package"`
-	CreatedTimestamp int64 `json:"CreatedTimestamp"`
-	Analysis         any   `json:"Analysis"`
-}
diff --git a/internal/resultstore/resultstore.go b/internal/resultstore/resultstore.go
index 83720c7c..dc89fa99 100644
--- a/internal/resultstore/resultstore.go
+++ b/internal/resultstore/resultstore.go
@@ -19,6 +19,7 @@ import (
 
 	"github.com/ossf/package-analysis/internal/pkgmanager"
 	"github.com/ossf/package-analysis/internal/utils"
+	"github.com/ossf/package-analysis/pkg/api/analysisrun"
 	"github.com/ossf/package-analysis/pkg/api/staticanalysis"
 )
 
@@ -248,9 +249,9 @@ func (rs *ResultStore) SaveDynamicAnalysis(ctx context.Context, p Pkg, analysis
 		filename = DefaultFilename(p)
 	}
 
-	data := &DynamicAnalysisRecord{
-		Package: pkg{
-			Ecosystem: p.EcosystemName(),
+	data := &analysisrun.DynamicAnalysisRecord{
+		Package: analysisrun.Key{
+			Ecosystem: p.Ecosystem(),
 			Name:      p.Name(),
 			Version:   p.Version(),
 		},
diff --git a/pkg/api/analysisrun/key.go b/pkg/api/analysisrun/key.go
index 2000efba..f010e75d 100644
--- a/pkg/api/analysisrun/key.go
+++ b/pkg/api/analysisrun/key.go
@@ -7,9 +7,9 @@ import (
 )
 
 type Key struct {
-	Ecosystem pkgecosystem.Ecosystem
-	Name      string
-	Version   string
+	Ecosystem pkgecosystem.Ecosystem `json:"Ecosystem"`
+	Name      string                 `json:"Name"`
+	Version   string                 `json:"Version"`
 }
 
 func (k Key) String() string {
diff --git a/pkg/api/analysisrun/result.go b/pkg/api/analysisrun/result.go
index 696dfba6..d6af5318 100644
--- a/pkg/api/analysisrun/result.go
+++ b/pkg/api/analysisrun/result.go
@@ -11,6 +11,14 @@ type (
 	DynamicAnalysisExecutionLog       string
 )
 
+// DynamicAnalysisRecord is the top-level struct which is serialised to produce JSON results files
+// for dynamic analysis.
+type DynamicAnalysisRecord struct {
+	Package          Key   `json:"Package"`
+	CreatedTimestamp int64 `json:"CreatedTimestamp"`
+	Analysis         any   `json:"Analysis"`
+}
+
 type DynamicAnalysisResults struct {
 	StraceSummary     DynamicAnalysisStraceSummary
 	FileWritesSummary DynamicAnalysisFileWritesSummary