diff --git a/.changeset/light-bags-raise.md b/.changeset/light-bags-raise.md
new file mode 100644
index 00000000..9200bf9a
--- /dev/null
+++ b/.changeset/light-bags-raise.md
@@ -0,0 +1,5 @@
+---
+'@soundxyz/sdk': patch
+---
+
+Add extra time and hex validations
diff --git a/packages/sdk/src/contract/edition-v2/read/create.ts b/packages/sdk/src/contract/edition-v2/read/create.ts
index 824113ce..b5cb457e 100644
--- a/packages/sdk/src/contract/edition-v2/read/create.ts
+++ b/packages/sdk/src/contract/edition-v2/read/create.ts
@@ -10,7 +10,7 @@ import {
   toHex,
 } from 'viem'
 import { MINT_GAS_LIMIT_MULTIPLIER, UINT32_MAX } from '../../../utils/constants'
-import { InvalidUint32 } from '../../../utils/errors'
+import { InvalidUint32, InvalidTimeValuesError, InvalidBytes32 } from '../../../utils/errors'
 import { curry, exhaustiveGuard, scaleAmount } from '../../../utils/helpers'
 import type { Prettify, TransactionGasOptions } from '../../../utils/types'
 import type { ContractCall } from '../../types'
@@ -48,6 +48,11 @@ function isValidUint32(value: number) {
   return true
 }
 
+function isValidBytes32(value: Hex) {
+  // 2 character for '0x' and then 64 characters for 32 bytes (each byte is 2 hex)
+  return value.length === 66
+}
+
 export function createTieredEditionArgs({
   owner,
   formattedSalt,
@@ -85,6 +90,13 @@ export function createTieredEditionArgs({
       })
     }
 
+    if (mintConfig.endTime <= mintConfig.startTime) {
+      throw new InvalidTimeValuesError({
+        startTime: mintConfig.startTime,
+        endTime: mintConfig.endTime,
+      })
+    }
+
     if (!isValidUint32(mintConfig.maxMintablePerAccount)) {
       throw new InvalidUint32({
         field: 'mintConfig.maxMintablePerAccount',
@@ -99,6 +111,20 @@ export function createTieredEditionArgs({
       })
     }
 
+    if (!isValidBytes32(mintConfig.affiliateMerkleRoot)) {
+      throw new InvalidBytes32({
+        field: 'mintConfig.affiliateMerkleRoot',
+        value: mintConfig.affiliateMerkleRoot,
+      })
+    }
+
+    if (mintConfig.mode === 'VERIFY_MERKLE' && !isValidBytes32(mintConfig.merkleRoot)) {
+      throw new InvalidBytes32({
+        field: 'mintConfig.merkleRoot',
+        value: mintConfig.merkleRoot,
+      })
+    }
+
     const mode: number = (() => {
       switch (mintConfig.mode) {
         case 'DEFAULT': {
diff --git a/packages/sdk/src/utils/errors.ts b/packages/sdk/src/utils/errors.ts
index 44e70072..bce10c52 100644
--- a/packages/sdk/src/utils/errors.ts
+++ b/packages/sdk/src/utils/errors.ts
@@ -252,14 +252,12 @@ export class InvalidTimeValuesError extends Error {
   readonly name = 'InvalidTimeValuesError'
 
   readonly startTime: number
-  readonly cutoffTime: number
   readonly endTime: number
 
-  constructor({ startTime, cutoffTime, endTime }: { startTime: number; cutoffTime: number; endTime: number }) {
-    super('startTime must be earlier than cutoffTime and cutoffTime must be earlier than endTime')
+  constructor({ startTime, endTime }: { startTime: number; endTime: number }) {
+    super('startTime must be earlier than endTime')
 
     this.startTime = startTime
-    this.cutoffTime = cutoffTime
     this.endTime = endTime
   }
 }
@@ -299,3 +297,15 @@ export class InvalidUint32 extends Error {
     this.value = value
   }
 }
+
+export class InvalidBytes32 extends Error {
+  readonly field: string
+  readonly value: unknown
+
+  constructor({ field, value }: { field: string; value: unknown }) {
+    super(`Invalid bytes32 for ${field}, this should be 0x followed by 64 characters, but provided ${String(value)}`)
+
+    this.field = field
+    this.value = value
+  }
+}