diff --git a/docs/getting-started.md b/docs/getting-started.md
index 11b379545..e01efab71 100644
--- a/docs/getting-started.md
+++ b/docs/getting-started.md
@@ -243,7 +243,7 @@ Creating a CType requires specifying its structure as a [JSON schema](https://js
 
 ```typescript
 const ctype = Kilt.CType.fromSchema({
-  $schema: 'http://kilt-protocol.org/draft-01/ctype#',
+  $schema: 'ipns://k51qzi5uqu5dkglos1mtdukd4axyhwav7e98bga8g2nptrkgcbj9506ruoadiz/v1/ctype.json',
   title: 'Drivers License',
   properties: {
     name: {
diff --git a/docs/getting-started.ts b/docs/getting-started.ts
index 1c7852c68..37ea6e41d 100644
--- a/docs/getting-started.ts
+++ b/docs/getting-started.ts
@@ -95,7 +95,7 @@ async function main(): Promise<void> {
 
   /* 2.2 Build a CType */
   const ctype = Kilt.CType.fromSchema({
-    $schema: 'http://kilt-protocol.org/draft-01/ctype#',
+    $schema: 'ipns://k51qzi5uqu5dkglos1mtdukd4axyhwav7e98bga8g2nptrkgcbj9506ruoadiz/v1/ctype.json',
     title: 'Drivers License',
     properties: {
       name: {
diff --git a/packages/core/src/__integrationtests__/Ctypes.spec.ts b/packages/core/src/__integrationtests__/Ctypes.spec.ts
index e27055ae4..ebab866ad 100644
--- a/packages/core/src/__integrationtests__/Ctypes.spec.ts
+++ b/packages/core/src/__integrationtests__/Ctypes.spec.ts
@@ -27,7 +27,10 @@ beforeAll(async () => {
   await initializeApi()
 })
 
-describe('When there is an CtypeCreator and a verifier', () => {
+describe.each([
+  'http://kilt-protocol.org/draft-01/ctype#',
+  'ipns://k51qzi5uqu5dkglos1mtdukd4axyhwav7e98bga8g2nptrkgcbj9506ruoadiz/v1/ctype.json',
+])('schema id %s', (schemaId) => {
   let ctypeCreator: FullDidDetails
   let paymentAccount: KeyringPair
   let ctypeCounter = 0
@@ -37,7 +40,7 @@ describe('When there is an CtypeCreator and a verifier', () => {
     ctypeCounter += 1
     return CType.fromSchema({
       $id: `kilt:ctype:0x${ctypeCounter}`,
-      $schema: 'http://kilt-protocol.org/draft-01/ctype#',
+      $schema: schemaId,
       title: `ctype${ctypeCounter}`,
       properties: {
         name: { type: 'string' },
@@ -104,7 +107,7 @@ describe('When there is an CtypeCreator and a verifier', () => {
   it('should tell when a ctype is not on chain', async () => {
     const iAmNotThere = CType.fromSchema({
       $id: 'kilt:ctype:0x2',
-      $schema: 'http://kilt-protocol.org/draft-01/ctype#',
+      $schema: schemaId,
       title: 'ctype2',
       properties: {
         game: { type: 'string' },
@@ -115,7 +118,7 @@ describe('When there is an CtypeCreator and a verifier', () => {
     const iAmNotThereWithOwner = CType.fromSchema(
       {
         $id: 'kilt:ctype:0x3',
-        $schema: 'http://kilt-protocol.org/draft-01/ctype#',
+        $schema: schemaId,
         title: 'ctype2',
         properties: {
           game: { type: 'string' },
diff --git a/packages/core/src/ctype/CType.utils.spec.ts b/packages/core/src/ctype/CType.utils.spec.ts
index decf282dd..351c56a2d 100644
--- a/packages/core/src/ctype/CType.utils.spec.ts
+++ b/packages/core/src/ctype/CType.utils.spec.ts
@@ -22,37 +22,6 @@ import { getOwner, isStored } from './CType.chain'
 
 jest.mock('./CType.chain')
 
-const ctypeInput = {
-  $id: 'kilt:ctype:0x1',
-  $schema: 'http://kilt-protocol.org/draft-01/ctype-input#',
-  title: 'Ctype Title',
-  properties: [
-    {
-      $id: 'kilt:ctype:0xfirst-property',
-      $ref: 'First Property',
-      type: 'integer',
-    },
-    {
-      $id: 'kilt:ctype:0xsecond-property',
-      $ref: 'Second Property',
-      type: 'string',
-    },
-  ],
-  type: 'object',
-  required: ['first-property', 'second-property'],
-} as any as ICType['schema']
-
-const ctypeWrapperModel: ICType['schema'] = {
-  $id: 'kilt:ctype:0x2',
-  $schema: 'http://kilt-protocol.org/draft-01/ctype#',
-  title: 'name',
-  properties: {
-    'first-property': { type: 'integer' },
-    'second-property': { type: 'string' },
-  },
-  type: 'object',
-}
-
 const goodClaim = {
   'first-property': 10,
   'second-property': '12',
@@ -64,80 +33,118 @@ const badClaim = {
   'third-property': true,
 }
 
-describe('CTypeUtils', () => {
-  it('verifies claims', () => {
-    expect(verifyClaimStructure(goodClaim, ctypeWrapperModel)).toBeTruthy()
-    expect(verifyClaimStructure(badClaim, ctypeWrapperModel)).toBeFalsy()
-    expect(verifySchemaWithErrors(badClaim, CTypeWrapperModel, [])).toBeFalsy()
-    expect(() => {
-      verifyClaimStructure(badClaim, ctypeInput)
-    }).toThrow(SDKErrors.ERROR_OBJECT_MALFORMED())
-  })
-  it('verifies ctypes', () => {
-    expect(verifySchema(ctypeWrapperModel, CTypeModel)).toBeTruthy()
-  })
-})
-
-describe('CType registration verification', () => {
-  const didAlice = 'did:kilt:4p6K4tpdZtY3rNqM2uorQmsS6d3woxtnWMHjtzGftHmDb41N'
-  const didBob = 'did:kilt:4rDeMGr3Hi4NfxRUp8qVyhvgW3BSUBLneQisGa9ASkhh2sXB'
+describe.each([
+  'http://kilt-protocol.org/draft-01/ctype#',
+  'ipns://k51qzi5uqu5dkglos1mtdukd4axyhwav7e98bga8g2nptrkgcbj9506ruoadiz/v1/ctype.json',
+])('schema id %s', (schemaId) => {
+  const ctypeInput = {
+    $id: 'kilt:ctype:0x1',
+    $schema: schemaId,
+    title: 'Ctype Title',
+    properties: [
+      {
+        $id: 'kilt:ctype:0xfirst-property',
+        $ref: 'First Property',
+        type: 'integer',
+      },
+      {
+        $id: 'kilt:ctype:0xsecond-property',
+        $ref: 'Second Property',
+        type: 'string',
+      },
+    ],
+    type: 'object',
+    required: ['first-property', 'second-property'],
+  } as any as ICType['schema']
 
-  const rawCType = {
+  const ctypeWrapperModel: ICType['schema'] = {
     $id: 'kilt:ctype:0x2',
-    $schema: 'http://kilt-protocol.org/draft-01/ctype#',
-    title: 'CtypeModel 2',
+    $schema: schemaId,
+    title: 'name',
     properties: {
-      name: { type: 'string' },
+      'first-property': { type: 'integer' },
+      'second-property': { type: 'string' },
     },
     type: 'object',
-  } as ICType['schema']
-
-  describe('when CType is not registered', () => {
-    beforeAll(() => {
-      ;(getOwner as jest.Mock).mockReturnValue(null)
-      ;(isStored as jest.Mock).mockReturnValue(false)
+  }
+
+  describe('CTypeUtils', () => {
+    it('verifies claims', () => {
+      expect(verifyClaimStructure(goodClaim, ctypeWrapperModel)).toBeTruthy()
+      expect(verifyClaimStructure(badClaim, ctypeWrapperModel)).toBeFalsy()
+      expect(
+        verifySchemaWithErrors(badClaim, CTypeWrapperModel, [])
+      ).toBeFalsy()
+      expect(() => {
+        verifyClaimStructure(badClaim, ctypeInput)
+      }).toThrow(SDKErrors.ERROR_OBJECT_MALFORMED())
     })
-
-    it('does not verify registration when not registered', async () => {
-      const ctype = CType.fromSchema(rawCType, didAlice)
-      await expect(ctype.verifyStored()).resolves.toBeFalsy()
-    })
-
-    it('does not verify owner when not registered', async () => {
-      const ctype = CType.fromSchema(rawCType, didAlice)
-      await expect(ctype.verifyOwner()).resolves.toBeFalsy()
+    it('verifies ctypes', () => {
+      expect(verifySchema(ctypeWrapperModel, CTypeModel)).toBeTruthy()
     })
   })
 
-  describe('when CType is registered', () => {
-    beforeAll(() => {
-      ;(getOwner as jest.Mock).mockReturnValue(didAlice)
-      ;(isStored as jest.Mock).mockReturnValue(true)
-    })
-
-    it('verifies registration when owner not set', async () => {
-      const ctype = CType.fromSchema(rawCType)
-      await expect(ctype.verifyStored()).resolves.toBeTruthy()
-    })
-
-    it('verifies registration when owner matches', async () => {
-      const ctype = CType.fromSchema(rawCType, didAlice)
-      await expect(ctype.verifyStored()).resolves.toBeTruthy()
-    })
-
-    it('verifies registration when owner does not match', async () => {
-      const ctype = CType.fromSchema(rawCType, didBob)
-      await expect(ctype.verifyStored()).resolves.toBeTruthy()
-    })
-
-    it('verifies owner when owner matches', async () => {
-      const ctype = CType.fromSchema(rawCType, didAlice)
-      await expect(ctype.verifyOwner()).resolves.toBeTruthy()
+  describe('CType registration verification', () => {
+    const didAlice = 'did:kilt:4p6K4tpdZtY3rNqM2uorQmsS6d3woxtnWMHjtzGftHmDb41N'
+    const didBob = 'did:kilt:4rDeMGr3Hi4NfxRUp8qVyhvgW3BSUBLneQisGa9ASkhh2sXB'
+
+    const rawCType = {
+      $id: 'kilt:ctype:0x2',
+      $schema: schemaId,
+      title: 'CtypeModel 2',
+      properties: {
+        name: { type: 'string' },
+      },
+      type: 'object',
+    } as ICType['schema']
+
+    describe('when CType is not registered', () => {
+      beforeAll(() => {
+        ;(getOwner as jest.Mock).mockReturnValue(null)
+        ;(isStored as jest.Mock).mockReturnValue(false)
+      })
+
+      it('does not verify registration when not registered', async () => {
+        const ctype = CType.fromSchema(rawCType, didAlice)
+        await expect(ctype.verifyStored()).resolves.toBeFalsy()
+      })
+
+      it('does not verify owner when not registered', async () => {
+        const ctype = CType.fromSchema(rawCType, didAlice)
+        await expect(ctype.verifyOwner()).resolves.toBeFalsy()
+      })
     })
 
-    it('does not verify owner when owner does not match', async () => {
-      const ctype = CType.fromSchema(rawCType, didBob)
-      await expect(ctype.verifyOwner()).resolves.toBeFalsy()
+    describe('when CType is registered', () => {
+      beforeAll(() => {
+        ;(getOwner as jest.Mock).mockReturnValue(didAlice)
+        ;(isStored as jest.Mock).mockReturnValue(true)
+      })
+
+      it('verifies registration when owner not set', async () => {
+        const ctype = CType.fromSchema(rawCType)
+        await expect(ctype.verifyStored()).resolves.toBeTruthy()
+      })
+
+      it('verifies registration when owner matches', async () => {
+        const ctype = CType.fromSchema(rawCType, didAlice)
+        await expect(ctype.verifyStored()).resolves.toBeTruthy()
+      })
+
+      it('verifies registration when owner does not match', async () => {
+        const ctype = CType.fromSchema(rawCType, didBob)
+        await expect(ctype.verifyStored()).resolves.toBeTruthy()
+      })
+
+      it('verifies owner when owner matches', async () => {
+        const ctype = CType.fromSchema(rawCType, didAlice)
+        await expect(ctype.verifyOwner()).resolves.toBeTruthy()
+      })
+
+      it('does not verify owner when owner does not match', async () => {
+        const ctype = CType.fromSchema(rawCType, didBob)
+        await expect(ctype.verifyOwner()).resolves.toBeFalsy()
+      })
     })
   })
 })
diff --git a/packages/core/src/ctype/CTypeSchema.ts b/packages/core/src/ctype/CTypeSchema.ts
index 63342a9a6..20c78f12f 100644
--- a/packages/core/src/ctype/CTypeSchema.ts
+++ b/packages/core/src/ctype/CTypeSchema.ts
@@ -12,7 +12,7 @@
 import { JsonSchema } from '@kiltprotocol/utils'
 
 export const CTypeModel: JsonSchema.Schema = {
-  $id: 'http://kilt-protocol.org/draft-01/ctype#',
+  $id: 'ipns://k51qzi5uqu5dkglos1mtdukd4axyhwav7e98bga8g2nptrkgcbj9506ruoadiz/v1/ctype.json',
   $schema: 'http://json-schema.org/draft-07/schema#',
   type: 'object',
   properties: {
@@ -24,7 +24,10 @@ export const CTypeModel: JsonSchema.Schema = {
     $schema: {
       type: 'string',
       format: 'uri',
-      const: 'http://kilt-protocol.org/draft-01/ctype#',
+      enum: [
+        'http://kilt-protocol.org/draft-01/ctype#',
+        'ipns://k51qzi5uqu5dkglos1mtdukd4axyhwav7e98bga8g2nptrkgcbj9506ruoadiz/v1/ctype.json',
+      ],
     },
     title: {
       type: 'string',
@@ -70,7 +73,7 @@ export const CTypeModel: JsonSchema.Schema = {
 }
 
 export const CTypeWrapperModel = {
-  $id: 'http://kilt-protocol.org/draft-01/ctype-wrapper#',
+  $id: 'ipns://k51qzi5uqu5dkglos1mtdukd4axyhwav7e98bga8g2nptrkgcbj9506ruoadiz/v1/ctype-wrapper.json',
   $schema: 'http://json-schema.org/draft-07/schema#',
   type: 'object',
   properties: {
@@ -89,7 +92,7 @@ export const CTypeWrapperModel = {
 }
 
 export const MetadataModel = {
-  $id: 'http://kilt-protocol.org/draft-01/ctype-metadata',
+  $id: 'ipns://k51qzi5uqu5dkglos1mtdukd4axyhwav7e98bga8g2nptrkgcbj9506ruoadiz/v1/ctype-metadata.json',
   $schema: 'http://json-schema.org/draft-07/schema#',
   type: 'object',
   properties: {