diff --git a/poetry.lock b/poetry.lock
index e645cdd..db46934 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -861,21 +861,6 @@ files = [
     {file = "iniconfig-2.0.0.tar.gz", hash = "sha256:2d91e135bf72d31a410b17c16da610a82cb55f6b0477d1a902134b24a455b8b3"},
 ]
 
-[[package]]
-name = "iscc-schema"
-version = "0.4.0"
-description = "ISCC - JSON-LD Metadata and OpenAPI Service Descriptions"
-optional = false
-python-versions = ">=3.7,<4.0.0"
-files = [
-    {file = "iscc-schema-0.4.0.tar.gz", hash = "sha256:fdc9367cd022c2aea7b93d9c81f6496cf9260e138333ce0a314dbb932fcc76b6"},
-    {file = "iscc_schema-0.4.0-py3-none-any.whl", hash = "sha256:2ab1265e526a8d6c4e1e558c7b15ff2b494923caf6dcfdc188d4a9f58130e492"},
-]
-
-[package.dependencies]
-jcs = ">=0.2,<0.3"
-pydantic = ">=1.9,<2.0"
-
 [[package]]
 name = "jaraco-classes"
 version = "3.2.3"
@@ -2394,4 +2379,4 @@ turbo = ["cython"]
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.7.2,<4.0"
-content-hash = "4734fa6320604e4b1ad89ee8697d7ff39f341ef4739aefc6c9b8fd872fdd321a"
+content-hash = "0813fc3b125848082f77087e295efe947fd5993218e6059efe5b1d6a14679325"
diff --git a/pyproject.toml b/pyproject.toml
index 848f638..5b8d113 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -68,7 +68,6 @@ PyYAML = "*"
 coverage = "*"
 pytest-cov = "*"
 poethepoet = "*"
-iscc-schema = "^0.4"
 bandit = "^1.7"
 mdformat = "*"
 mdformat_admon = "*"
diff --git a/tests/test_code_content_audio.py b/tests/test_code_content_audio.py
index 526aa6d..5e167a8 100644
--- a/tests/test_code_content_audio.py
+++ b/tests/test_code_content_audio.py
@@ -1,6 +1,4 @@
 # -*- coding: utf-8 -*-
-from iscc_schema import IsccMeta
-
 import iscc_core.code_content_audio
 
 
@@ -79,9 +77,9 @@ def test_gen_audio_code():
     }
 
 
-def test_cen_audio_code_schema_conformance():
-    iscc_obj = IsccMeta(**iscc_core.gen_audio_code_v0(CHROMA_VECTOR))
-    assert iscc_obj.iscc == "ISCC:EIAWUJFCEZZOJYVD"
+def test_gen_audio_code_schema_conformance():
+    iscc_obj = iscc_core.gen_audio_code_v0(CHROMA_VECTOR)
+    assert iscc_obj == {"iscc": "ISCC:EIAWUJFCEZZOJYVD"}
 
 
 CHROMA_VECTOR = [
diff --git a/tests/test_code_content_image.py b/tests/test_code_content_image.py
index 84dd3da..03f88ef 100644
--- a/tests/test_code_content_image.py
+++ b/tests/test_code_content_image.py
@@ -1,6 +1,5 @@
 # -*- coding: utf-8 -*-
 import pytest
-from iscc_schema import IsccMeta
 import iscc_core as ic
 
 
@@ -87,8 +86,8 @@ def test_dct_range():
 
 
 def test_gen_image_code_schema_conformance():
-    iscc_obj = IsccMeta(**ic.gen_image_code_v0(IMG_SAMPLE_PIXELS))
-    assert iscc_obj.iscc == "ISCC:EEA4GQZQTY6J5DTH"
+    iscc_obj = ic.gen_image_code_v0(IMG_SAMPLE_PIXELS)
+    assert iscc_obj == {"iscc": "ISCC:EEA4GQZQTY6J5DTH"}
 
 
 def test_soft_hash_image_v0_larger_256_raises():
diff --git a/tests/test_code_content_mixed.py b/tests/test_code_content_mixed.py
index a0030f1..f9f3e05 100644
--- a/tests/test_code_content_mixed.py
+++ b/tests/test_code_content_mixed.py
@@ -1,7 +1,5 @@
 # -*- coding: utf-8 -*-
 import pytest
-from iscc_schema import IsccMeta
-
 import iscc_core
 
 
@@ -52,5 +50,11 @@ def test_gen_mixed_code_schema_conformance():
     tc_long = iscc_core.gen_text_code_v0("Hello World", bits=256)["iscc"]
     tc_short = iscc_core.gen_text_code_v0("Short Text-Code", bits=64)["iscc"]
     codes = tc_long, tc_short
-    iscc_obj = IsccMeta(**iscc_core.gen_mixed_code_v0(codes=codes))
-    assert iscc_obj.iscc == "ISCC:EQASBPL7XH763357"
+    iscc_obj = iscc_core.gen_mixed_code_v0(codes=codes)
+    assert iscc_obj == {
+        "iscc": "ISCC:EQASBPL7XH763357",
+        "parts": [
+            "ISCC:EADSKDNZNYGUUF5AMFEJLZ5P66CP5YKCOA3X7F36RWE4CIRCBTUWXYY",
+            "ISCC:EAA3265Q67Q27P7F",
+        ],
+    }
diff --git a/tests/test_code_content_text.py b/tests/test_code_content_text.py
index 06b3c33..1ff5d23 100644
--- a/tests/test_code_content_text.py
+++ b/tests/test_code_content_text.py
@@ -1,7 +1,5 @@
 # -*- coding: utf-8 -*-
 import pytest
-from iscc_schema import IsccMeta
-
 import iscc_core
 
 TEXT_A = """
@@ -92,5 +90,5 @@ def test_code_text_empty():
 
 
 def test_gen_text_code_schema_conformance():
-    iscc_obj = IsccMeta(**iscc_core.gen_text_code_v0("Hello World"))
-    assert iscc_obj.iscc == "ISCC:EAASKDNZNYGUUF5A"
+    iscc_obj = iscc_core.gen_text_code_v0("Hello World")
+    assert iscc_obj == {"iscc": "ISCC:EAASKDNZNYGUUF5A", "characters": 10}
diff --git a/tests/test_code_content_video.py b/tests/test_code_content_video.py
index 03bf97d..4bfff39 100644
--- a/tests/test_code_content_video.py
+++ b/tests/test_code_content_video.py
@@ -1,6 +1,4 @@
 # -*- coding: utf-8 -*-
-from iscc_schema import IsccMeta
-
 import iscc_core
 
 
@@ -64,5 +62,5 @@ def test_gen_video_code_schema_confromance():
     fa = tuple([0, 1, 0, 2, 1] * 76)
     fb = tuple([1, 2, 1, 0, 2] * 76)
     frame_vectors = [fa, fb]
-    iscc_obj = IsccMeta(**iscc_core.gen_video_code_v0(frame_vectors))
-    assert iscc_obj.iscc == "ISCC:EMAZEMGSDFIB4AHU"
+    iscc_obj = iscc_core.gen_video_code_v0(frame_vectors)
+    assert iscc_obj == {"iscc": "ISCC:EMAZEMGSDFIB4AHU"}
diff --git a/tests/test_code_data.py b/tests/test_code_data.py
index 875dca6..c495b51 100644
--- a/tests/test_code_data.py
+++ b/tests/test_code_data.py
@@ -1,8 +1,5 @@
 from io import BytesIO
 import random
-
-from iscc_schema import IsccMeta
-
 import iscc_core
 
 
@@ -90,5 +87,5 @@ def test_DataHasher(static_bytes):
 
 
 def test_gen_data_code_schema_conformance():
-    iscc_obj = IsccMeta(**iscc_core.gen_data_code_v0(BytesIO(b"\xff")))
-    assert iscc_obj.iscc == "ISCC:GAAV5ZIQC4WCUBIK"
+    iscc_obj = iscc_core.gen_data_code_v0(BytesIO(b"\xff"))
+    assert iscc_obj == {"iscc": "ISCC:GAAV5ZIQC4WCUBIK"}
diff --git a/tests/test_code_instance.py b/tests/test_code_instance.py
index 94c30bf..3bbf777 100644
--- a/tests/test_code_instance.py
+++ b/tests/test_code_instance.py
@@ -1,5 +1,4 @@
 from io import BytesIO
-from iscc_schema import IsccMeta
 import iscc_core
 
 
@@ -50,5 +49,9 @@ def test_gen_code_instance_hello_world_256():
 
 
 def test_gen_instance_code_schema_conformance():
-    iscc_obj = IsccMeta(**iscc_core.gen_instance_code_v0(BytesIO(b"hello world")))
-    assert iscc_obj.iscc == "ISCC:IAA5OSMB56TQUDEI"
+    iscc_obj = iscc_core.gen_instance_code_v0(BytesIO(b"hello world"))
+    assert iscc_obj == {
+        "iscc": "ISCC:IAA5OSMB56TQUDEI",
+        "datahash": "1e20d74981efa70a0c880b8d8c1985d075dbcbf679b99a5f9914e5aaf96b831a9e24",
+        "filesize": 11,
+    }
diff --git a/tests/test_code_meta.py b/tests/test_code_meta.py
index 59032b8..88a9576 100644
--- a/tests/test_code_meta.py
+++ b/tests/test_code_meta.py
@@ -1,6 +1,5 @@
 # -*- coding: utf-8 -*-
 import pytest
-from iscc_schema import IsccMeta
 import iscc_core as ic
 
 
@@ -42,7 +41,6 @@ def test_gen_meta_code_meta_dict():
         "meta": "data:application/json;base64,eyJoZWxsbyI6Im1ldGFkYXRhIn0=",
         "metahash": "1e200c6f9a94eb08835a957ffc9a7c80cf3fb54d1c6a8f13a41a6573a57ba146b0d2",
     }
-    assert IsccMeta(**m).iscc == "ISCC:AAAWKLHFXMFCA2OC"
 
 
 def test_gen_meta_code_meta_bytes():
@@ -104,8 +102,6 @@ def test_gen_meta_code_v0_interleaved():
         "metahash": "1e2041f8394111eb713a22165c46c90ab8f0fd9399c92028fd6d288944b23ff5bf76",
         "name": "Hello",
     }
-    assert IsccMeta(**ma).iscc == "ISCC:AAAWKLHFXM75OAMK"
-    assert IsccMeta(**mb).iscc == "ISCC:AAAWKLHFXNSF7NNE"
 
 
 def test_gen_meta_code_v0_metadata_raises():
diff --git a/tests/test_iscc_code.py b/tests/test_iscc_code.py
index 4a8816d..6f40006 100644
--- a/tests/test_iscc_code.py
+++ b/tests/test_iscc_code.py
@@ -1,6 +1,5 @@
 # -*- coding: utf-8 -*-
 import pytest
-from iscc_schema import IsccMeta
 import iscc_core as ic
 
 
@@ -51,7 +50,6 @@ def test_gen_iscc_code_v0_no_meta_content_128():
     icode = ic.gen_iscc_code_v0([DID_64, IID_256])
     assert icode == {"iscc": "ISCC:KUAAQICFKJYKY4KUMQV6B6THIBBUG"}
     assert ic.iscc_explain(icode["iscc"]) == "ISCC-SUM-V0-DI-0820455270ac7154642be0fa67404343"
-    assert IsccMeta(**icode).iscc == "ISCC:KUAAQICFKJYKY4KUMQV6B6THIBBUG"
 
 
 def test_gen_iscc_code_v0_ordering():
@@ -61,7 +59,6 @@ def test_gen_iscc_code_v0_ordering():
         ic.iscc_explain(icode["iscc"])
         == "ISCC-TEXT-V0-MCDI-87dedce74b3c353b16257380a960347a5a8ba362526c2b3c642be0fa67404343"
     )
-    assert IsccMeta(**icode).iscc == "ISCC:KACYPXW445FTYNJ3CYSXHAFJMA2HUWULUNRFE3BLHRSCXYH2M5AEGQY"
 
 
 def test_gen_iscc_code_v0_insufficient_codes_raises():