diff --git a/helper-cli/src/main/kotlin/commands/SubtractScanResultsCommand.kt b/helper-cli/src/main/kotlin/commands/SubtractScanResultsCommand.kt
index 8ee5a273f6b78..649cfb4432052 100644
--- a/helper-cli/src/main/kotlin/commands/SubtractScanResultsCommand.kt
+++ b/helper-cli/src/main/kotlin/commands/SubtractScanResultsCommand.kt
@@ -96,7 +96,7 @@ private operator fun ScanSummary.minus(other: ScanSummary?): ScanSummary {
 
     return copy(
         licenseFindings = (licenseFindings - other.licenseFindings).toSortedSet(),
-        copyrightFindings = (copyrightFindings - other.copyrightFindings).toSortedSet()
+        copyrightFindings = copyrightFindings - other.copyrightFindings
     )
 }
 
diff --git a/model/src/main/kotlin/CopyrightFinding.kt b/model/src/main/kotlin/CopyrightFinding.kt
index 5ce19f575410b..5974ab390fdfd 100644
--- a/model/src/main/kotlin/CopyrightFinding.kt
+++ b/model/src/main/kotlin/CopyrightFinding.kt
@@ -32,10 +32,8 @@ data class CopyrightFinding(
      * The text location where the copyright statement was found.
      */
     val location: TextLocation
-) : Comparable<CopyrightFinding> {
+) {
     companion object {
-        private val COMPARATOR = compareBy<CopyrightFinding>({ it.statement }, { it.location })
+        val COMPARATOR = compareBy<CopyrightFinding>({ it.statement }, { it.location })
     }
-
-    override fun compareTo(other: CopyrightFinding) = COMPARATOR.compare(this, other)
 }
diff --git a/model/src/main/kotlin/ScanSummary.kt b/model/src/main/kotlin/ScanSummary.kt
index 817fad93cab4d..4bee0426e8b53 100644
--- a/model/src/main/kotlin/ScanSummary.kt
+++ b/model/src/main/kotlin/ScanSummary.kt
@@ -29,6 +29,7 @@ import java.time.Instant
 import java.util.SortedSet
 
 import org.ossreviewtoolkit.model.config.LicenseFilePatterns
+import org.ossreviewtoolkit.model.utils.CopyrightFindingSortedSetConverter
 import org.ossreviewtoolkit.model.utils.RootLicenseMatcher
 import org.ossreviewtoolkit.model.utils.SnippetFinding
 import org.ossreviewtoolkit.model.utils.SnippetFindingSortedSetConverter
@@ -69,7 +70,8 @@ data class ScanSummary(
      */
     @JsonInclude(JsonInclude.Include.NON_EMPTY)
     @JsonProperty("copyrights")
-    val copyrightFindings: SortedSet<CopyrightFinding> = sortedSetOf(),
+    @JsonSerialize(converter = CopyrightFindingSortedSetConverter::class)
+    val copyrightFindings: Set<CopyrightFinding> = emptySet(),
 
     /**
      * The detected snippet findings.
@@ -118,7 +120,7 @@ data class ScanSummary(
         fun TextLocation.matchesPath() = this.path.startsWith("$path/") || this.path in applicableLicenseFiles
 
         val licenseFindings = licenseFindings.filter { it.location.matchesPath() }.toSortedSet()
-        val copyrightFindings = copyrightFindings.filter { it.location.matchesPath() }.toSortedSet()
+        val copyrightFindings = copyrightFindings.filterTo(mutableSetOf()) { it.location.matchesPath() }
 
         return copy(
             licenseFindings = licenseFindings,
@@ -135,7 +137,7 @@ data class ScanSummary(
 
         return copy(
             licenseFindings = licenseFindings.filterTo(sortedSetOf()) { !matcher.matches(it.location.path) },
-            copyrightFindings = copyrightFindings.filterTo(sortedSetOf()) { !matcher.matches(it.location.path) }
+            copyrightFindings = copyrightFindings.filterTo(mutableSetOf()) { !matcher.matches(it.location.path) }
         )
     }
 }
diff --git a/model/src/main/kotlin/utils/SortedSetConverters.kt b/model/src/main/kotlin/utils/SortedSetConverters.kt
index 8f75d682c7db8..f0cd41ae6841a 100644
--- a/model/src/main/kotlin/utils/SortedSetConverters.kt
+++ b/model/src/main/kotlin/utils/SortedSetConverters.kt
@@ -25,9 +25,14 @@ import com.fasterxml.jackson.databind.util.StdConverter
 
 import java.util.SortedSet
 
+import org.ossreviewtoolkit.model.CopyrightFinding
 import org.ossreviewtoolkit.model.Package
 import org.ossreviewtoolkit.model.Project
 
+class CopyrightFindingSortedSetConverter : StdConverter<Set<CopyrightFinding>, SortedSet<CopyrightFinding>>() {
+    override fun convert(value: Set<CopyrightFinding>) = value.toSortedSet(CopyrightFinding.COMPARATOR)
+}
+
 class PackageSortedSetConverter : StdConverter<Set<Package>, SortedSet<Package>>() {
     override fun convert(value: Set<Package>) = value.toSortedSet(compareBy { it.id })
 }
diff --git a/plugins/reporters/freemarker/src/main/kotlin/FreemarkerTemplateProcessor.kt b/plugins/reporters/freemarker/src/main/kotlin/FreemarkerTemplateProcessor.kt
index 529297cee8d55..853d7b9376388 100644
--- a/plugins/reporters/freemarker/src/main/kotlin/FreemarkerTemplateProcessor.kt
+++ b/plugins/reporters/freemarker/src/main/kotlin/FreemarkerTemplateProcessor.kt
@@ -468,7 +468,7 @@ internal fun OrtResult.deduplicateProjectScanResults(targetProjects: Set<Identif
                 val repositoryPath = getRepositoryPath(scanResult.provenance as RepositoryProvenance)
                 fun TextLocation.isExcluded() = "$repositoryPath$path" !in excludePaths
 
-                val copyrightFindings = summary.copyrightFindings.filterTo(sortedSetOf()) { it.location.isExcluded() }
+                val copyrightFindings = summary.copyrightFindings.filterTo(mutableSetOf()) { it.location.isExcluded() }
                 val licenseFindings = summary.licenseFindings.filterTo(sortedSetOf()) { it.location.isExcluded() }
 
                 scanResult.copy(
diff --git a/plugins/reporters/freemarker/src/test/kotlin/FreeMarkerTemplateProcessorTest.kt b/plugins/reporters/freemarker/src/test/kotlin/FreeMarkerTemplateProcessorTest.kt
index 20c0cd084778e..b0377220d8445 100644
--- a/plugins/reporters/freemarker/src/test/kotlin/FreeMarkerTemplateProcessorTest.kt
+++ b/plugins/reporters/freemarker/src/test/kotlin/FreeMarkerTemplateProcessorTest.kt
@@ -84,7 +84,7 @@ private fun scanResults(
     findingsPaths: Collection<String>
 ): List<ScanResult> {
     val licenseFindings = findingsPaths.mapTo(sortedSetOf()) { LicenseFinding("MIT", TextLocation(it, 1)) }
-    val copyrightFindings = findingsPaths.mapTo(sortedSetOf()) { CopyrightFinding("(c)", TextLocation(it, 1)) }
+    val copyrightFindings = findingsPaths.mapTo(mutableSetOf()) { CopyrightFinding("(c)", TextLocation(it, 1)) }
 
     return listOf(
         ScanResult(
diff --git a/plugins/reporters/opossum/src/test/kotlin/OpossumReporterTest.kt b/plugins/reporters/opossum/src/test/kotlin/OpossumReporterTest.kt
index 2a0f35e27eee6..1f750131c7ec2 100644
--- a/plugins/reporters/opossum/src/test/kotlin/OpossumReporterTest.kt
+++ b/plugins/reporters/opossum/src/test/kotlin/OpossumReporterTest.kt
@@ -460,7 +460,7 @@ private fun createOrtResult(): OrtResult {
                                     location = TextLocation("LICENSE", 1)
                                 )
                             ),
-                            copyrightFindings = sortedSetOf(
+                            copyrightFindings = setOf(
                                 CopyrightFinding(
                                     statement = "Copyright 2020 Some copyright holder in source artifact",
                                     location = TextLocation("some/file", 1)
@@ -497,7 +497,7 @@ private fun createOrtResult(): OrtResult {
                                     location = TextLocation("LICENSE", 1)
                                 )
                             ),
-                            copyrightFindings = sortedSetOf(
+                            copyrightFindings = setOf(
                                 CopyrightFinding(
                                     statement = "Copyright 2020 Some copyright holder in VCS",
                                     location = TextLocation("some/file", 1)
diff --git a/plugins/reporters/spdx/src/funTest/kotlin/SpdxDocumentReporterFunTest.kt b/plugins/reporters/spdx/src/funTest/kotlin/SpdxDocumentReporterFunTest.kt
index 0b912303b5bc2..e360726042a38 100644
--- a/plugins/reporters/spdx/src/funTest/kotlin/SpdxDocumentReporterFunTest.kt
+++ b/plugins/reporters/spdx/src/funTest/kotlin/SpdxDocumentReporterFunTest.kt
@@ -283,7 +283,7 @@ private val ortResult = OrtResult(
                                 location = TextLocation("LICENSE", 1)
                             )
                         ),
-                        copyrightFindings = sortedSetOf(
+                        copyrightFindings = setOf(
                             CopyrightFinding(
                                 statement = "Copyright 2020 Some copyright holder in source artifact",
                                 location = TextLocation("some/file", 1)
@@ -314,7 +314,7 @@ private val ortResult = OrtResult(
                                 location = TextLocation("LICENSE", 1)
                             )
                         ),
-                        copyrightFindings = sortedSetOf(
+                        copyrightFindings = setOf(
                             CopyrightFinding(
                                 statement = "Copyright 2020 Some copyright holder in VCS",
                                 location = TextLocation("some/file", 1)
diff --git a/reporter/src/testFixtures/kotlin/TestData.kt b/reporter/src/testFixtures/kotlin/TestData.kt
index 6632cd6682840..4cb7437de8a4e 100644
--- a/reporter/src/testFixtures/kotlin/TestData.kt
+++ b/reporter/src/testFixtures/kotlin/TestData.kt
@@ -233,7 +233,7 @@ val ORT_RESULT = OrtResult(
                                 location = TextLocation("project-with-findings/file", 1)
                             )
                         ),
-                        copyrightFindings = sortedSetOf(
+                        copyrightFindings = setOf(
                             CopyrightFinding(
                                 statement = "Copyright 1",
                                 location = TextLocation("project-with-findings/file", 1)
@@ -260,7 +260,7 @@ val ORT_RESULT = OrtResult(
                                 location = TextLocation("file", 1)
                             )
                         ),
-                        copyrightFindings = sortedSetOf(
+                        copyrightFindings = setOf(
                             CopyrightFinding(
                                 statement = "Copyright 1",
                                 location = TextLocation("file", 1)
@@ -289,7 +289,7 @@ val ORT_RESULT = OrtResult(
                                 location = TextLocation("file", 1)
                             )
                         ),
-                        copyrightFindings = sortedSetOf(
+                        copyrightFindings = setOf(
                             CopyrightFinding(
                                 statement = "Copyright 1",
                                 location = TextLocation("LICENSE", 1)
@@ -326,7 +326,7 @@ val ORT_RESULT = OrtResult(
                                 location = TextLocation("file", 50)
                             )
                         ),
-                        copyrightFindings = sortedSetOf(
+                        copyrightFindings = setOf(
                             CopyrightFinding(
                                 statement = "Copyright 1",
                                 location = TextLocation("LICENSE", 1)
@@ -363,7 +363,7 @@ val ORT_RESULT = OrtResult(
                                 location = TextLocation("file2", 1)
                             )
                         ),
-                        copyrightFindings = sortedSetOf(
+                        copyrightFindings = setOf(
                             CopyrightFinding(
                                 statement = "Copyright 1",
                                 location = TextLocation("file1", 1)
@@ -392,7 +392,7 @@ val ORT_RESULT = OrtResult(
                                 location = TextLocation("LICENSE", 1)
                             )
                         ),
-                        copyrightFindings = sortedSetOf(
+                        copyrightFindings = setOf(
                             CopyrightFinding(
                                 statement = "Copyright 1",
                                 location = TextLocation("LICENSE", 1)
diff --git a/scanner/src/main/kotlin/Scanner.kt b/scanner/src/main/kotlin/Scanner.kt
index 5b63a6fc2e435..a7f22c386f869 100644
--- a/scanner/src/main/kotlin/Scanner.kt
+++ b/scanner/src/main/kotlin/Scanner.kt
@@ -710,7 +710,7 @@ fun ScanResult.toNestedProvenanceScanResult(nestedProvenance: NestedProvenance):
                 provenance = provenance,
                 summary = summary.copy(
                     licenseFindings = licenseFindingsByProvenance[provenance].orEmpty().toSortedSet(),
-                    copyrightFindings = copyrightFindingsByProvenance[provenance].orEmpty().toSortedSet()
+                    copyrightFindings = copyrightFindingsByProvenance[provenance].orEmpty().toSet()
                 )
             )
         )
diff --git a/scanner/src/main/kotlin/provenance/NestedProvenanceScanResult.kt b/scanner/src/main/kotlin/provenance/NestedProvenanceScanResult.kt
index a892a687b38b1..f7462751c00e3 100644
--- a/scanner/src/main/kotlin/provenance/NestedProvenanceScanResult.kt
+++ b/scanner/src/main/kotlin/provenance/NestedProvenanceScanResult.kt
@@ -120,12 +120,12 @@ data class NestedProvenanceScanResult(
         return findings
     }
 
-    private fun Map<KnownProvenance, List<ScanResult>>.mergeCopyrightFindings(): SortedSet<CopyrightFinding> {
+    private fun Map<KnownProvenance, List<ScanResult>>.mergeCopyrightFindings(): Set<CopyrightFinding> {
         val findingsByPath = mapKeys { getPath(it.key) }.mapValues { (_, scanResults) ->
             scanResults.flatMap { it.summary.copyrightFindings }
         }
 
-        val findings = findingsByPath.flatMapTo(sortedSetOf()) { (path, findings) ->
+        val findings = findingsByPath.flatMapTo(mutableSetOf()) { (path, findings) ->
             val prefix = if (path.isEmpty()) path else "$path/"
             findings.map { it.copy(location = it.location.copy(path = "$prefix${it.location.path}")) }
         }
diff --git a/scanner/src/main/kotlin/scanners/fossid/FossId.kt b/scanner/src/main/kotlin/scanners/fossid/FossId.kt
index c30b89746ce82..c01969a388a9d 100644
--- a/scanner/src/main/kotlin/scanners/fossid/FossId.kt
+++ b/scanner/src/main/kotlin/scanners/fossid/FossId.kt
@@ -860,7 +860,7 @@ class FossId internal constructor(
             endTime = Instant.now(),
             packageVerificationCode = "",
             licenseFindings = licenseFindings.toSortedSet(),
-            copyrightFindings = copyrightFindings.toSortedSet(),
+            copyrightFindings = copyrightFindings,
             snippetFindings = snippetFindings,
             issues = issues
         )
diff --git a/scanner/src/main/kotlin/scanners/fossid/FossIdScanResults.kt b/scanner/src/main/kotlin/scanners/fossid/FossIdScanResults.kt
index fc420014ea72c..cb8d9e71a2da0 100644
--- a/scanner/src/main/kotlin/scanners/fossid/FossIdScanResults.kt
+++ b/scanner/src/main/kotlin/scanners/fossid/FossIdScanResults.kt
@@ -46,8 +46,8 @@ internal data class RawResults(
  * A data class to hold FossID mapped results.
  */
 internal data class FindingsContainer(
-    val licenseFindings: MutableList<LicenseFinding>,
-    val copyrightFindings: MutableList<CopyrightFinding>
+    val licenseFindings: MutableSet<LicenseFinding>,
+    val copyrightFindings: MutableSet<CopyrightFinding>
 )
 
 /**
@@ -58,8 +58,8 @@ internal fun <T : Summarizable> List<T>.mapSummary(
     issues: MutableList<Issue>,
     detectedLicenseMapping: Map<String, String>
 ): FindingsContainer {
-    val licenseFindings = mutableListOf<LicenseFinding>()
-    val copyrightFindings = mutableListOf<CopyrightFinding>()
+    val licenseFindings = mutableSetOf<LicenseFinding>()
+    val copyrightFindings = mutableSetOf<CopyrightFinding>()
 
     val files = filterNot { it.getFileName() in ignoredFiles }
     files.forEach { summarizable ->
diff --git a/scanner/src/main/kotlin/scanners/scancode/ScanCodeResultParser.kt b/scanner/src/main/kotlin/scanners/scancode/ScanCodeResultParser.kt
index 289836c11c8e9..c5e755e1d21ec 100644
--- a/scanner/src/main/kotlin/scanners/scancode/ScanCodeResultParser.kt
+++ b/scanner/src/main/kotlin/scanners/scancode/ScanCodeResultParser.kt
@@ -131,7 +131,7 @@ internal fun generateSummary(
         endTime = endTime,
         packageVerificationCode = verificationCode,
         licenseFindings = getLicenseFindings(result, detectedLicenseMapping, parseExpressions).toSortedSet(),
-        copyrightFindings = getCopyrightFindings(result).toSortedSet(),
+        copyrightFindings = getCopyrightFindings(result),
         issues = issues + getIssues(result)
     )
 }
@@ -190,7 +190,7 @@ private fun getLicenseFindings(
     result: JsonNode,
     detectedLicenseMapping: Map<String, String>,
     parseExpressions: Boolean
-): List<LicenseFinding> {
+): Set<LicenseFinding> {
     val licenseFindings = mutableListOf<LicenseFinding>()
 
     val input = getInputPath(result)
@@ -227,7 +227,7 @@ private fun getLicenseFindings(
         }
     }
 
-    return associateLicensesWithExceptions(licenseFindings)
+    return associateLicensesWithExceptions(licenseFindings).toSet()
 }
 
 /**
@@ -265,8 +265,8 @@ internal fun replaceLicenseKeys(licenseExpression: String, replacements: Collect
 /**
  * Get the copyright findings from the given [result].
  */
-private fun getCopyrightFindings(result: JsonNode): List<CopyrightFinding> {
-    val copyrightFindings = mutableListOf<CopyrightFinding>()
+private fun getCopyrightFindings(result: JsonNode): Set<CopyrightFinding> {
+    val copyrightFindings = mutableSetOf<CopyrightFinding>()
 
     val input = getInputPath(result)
 
diff --git a/scanner/src/main/kotlin/scanners/scanoss/ScanOssResultParser.kt b/scanner/src/main/kotlin/scanners/scanoss/ScanOssResultParser.kt
index b796e0244fba9..2866cb8ff6909 100644
--- a/scanner/src/main/kotlin/scanners/scanoss/ScanOssResultParser.kt
+++ b/scanner/src/main/kotlin/scanners/scanoss/ScanOssResultParser.kt
@@ -68,8 +68,8 @@ internal fun generateSummary(
     result: FullScanResponse,
     detectedLicenseMapping: Map<String, String>
 ): ScanSummary {
-    val licenseFindings = mutableListOf<LicenseFinding>()
-    val copyrightFindings = mutableListOf<CopyrightFinding>()
+    val licenseFindings = mutableSetOf<LicenseFinding>()
+    val copyrightFindings = mutableSetOf<CopyrightFinding>()
     val snippetFindings = mutableSetOf<SnippetFinding>()
 
     result.forEach { (_, scanResponses) ->
@@ -97,7 +97,7 @@ internal fun generateSummary(
         endTime = endTime,
         packageVerificationCode = verificationCode,
         licenseFindings = licenseFindings.toSortedSet(),
-        copyrightFindings = copyrightFindings.toSortedSet(),
+        copyrightFindings = copyrightFindings,
         snippetFindings = snippetFindings
     )
 }
diff --git a/scanner/src/test/kotlin/provenance/NestedProvenanceScanResultTest.kt b/scanner/src/test/kotlin/provenance/NestedProvenanceScanResultTest.kt
index 729814184dd31..c6cd65135eb0b 100644
--- a/scanner/src/test/kotlin/provenance/NestedProvenanceScanResultTest.kt
+++ b/scanner/src/test/kotlin/provenance/NestedProvenanceScanResultTest.kt
@@ -121,7 +121,7 @@ private val scanResultRoot = ScanResult(
             LicenseFinding("Apache-2.0", TextLocation("file", 1)),
             LicenseFinding("Apache-2.0", TextLocation("submodules/file", 1))
         ),
-        copyrightFindings = sortedSetOf(
+        copyrightFindings = setOf(
             CopyrightFinding("Copyright", TextLocation("file", 1)),
             CopyrightFinding("Copyright", TextLocation("submodules/file", 1))
         )
@@ -136,7 +136,7 @@ private val scanResultSubmoduleA = ScanResult(
             LicenseFinding("Apache-2.0", TextLocation("fileA", 1)),
             LicenseFinding("Apache-2.0", TextLocation("dir/fileA", 1))
         ),
-        copyrightFindings = sortedSetOf(
+        copyrightFindings = setOf(
             CopyrightFinding("Copyright", TextLocation("fileA", 1)),
             CopyrightFinding("Copyright", TextLocation("dir/fileA", 1))
         )
@@ -151,7 +151,7 @@ private val scanResultSubmoduleB = ScanResult(
             LicenseFinding("Apache-2.0", TextLocation("fileB", 1)),
             LicenseFinding("Apache-2.0", TextLocation("dir/fileB", 1))
         ),
-        copyrightFindings = sortedSetOf(
+        copyrightFindings = setOf(
             CopyrightFinding("Copyright", TextLocation("fileB", 1)),
             CopyrightFinding("Copyright", TextLocation("dir/fileB", 1))
         )