diff --git a/doc/API.v0.md b/doc/API.v0.md
index 3bdd2f9..96b9821 100644
--- a/doc/API.v0.md
+++ b/doc/API.v0.md
@@ -957,3 +957,116 @@ Proxy response:
 }
 ```
 
+### Stamp a hash on the Bitcoin blockchain using OTS (called by application)
+
+Will stamp the supplied hash to the Bitcoin blockchain using OTS.  Cyphernode will curl the callback when the OTS stamping is complete.
+
+```http
+POST http://cyphernode:8888/ots_stamp
+with body...
+{"hash":"1ddfb769eb0b8876bc570e25580e6a53afcf973362ee1ee4b54a807da2e5eed7","callbackUrl":"192.168.111.233:1111/otscallback?id=1234567"}
+```
+
+Proxy response:
+
+```json
+{
+  "method": "ots_stamp",
+  "hash": "1ddfb769eb0b8876bc570e25580e6a53afcf973362ee1ee4b54a807da2e5eed7",
+  "id": "422",
+  "result": "success"
+}
+```
+
+```json
+{
+  "method": "ots_stamp",
+  "hash": "1ddfb769eb0b8876bc570e25580e6a53afcf973362ee1ee4b54a807da2e5eed7",
+  "id": "422",
+  "result": "error",
+  "error": "Error message from OTS client."
+}
+```
+
+### Get the OTS file of the supplied hash
+
+Returns the binary OTS file of the supplied hash.  If stamp is complete, will return a complete OTS file, or an incomplete OTS file otherwise.
+
+```http
+GET http://cyphernode:8888/ots_getfile/1ddfb769eb0b8876bc570e25580e6a53afcf973362ee1ee4b54a807da2e5eed7
+```
+
+Proxy response:
+
+Binary application/octet-stream content type.
+
+### Verify an OTS file
+
+Will verify the supplied OTS file, or verify the local OTS file named after the supplied hash suffixed with .ots.
+
+```http
+POST http://cyphernode:8888/ots_verify
+with body...
+{"hash":"1ddfb769eb0b8876bc570e25580e6a53afcf973362ee1ee4b54a807da2e5eed7"}
+or
+{"hash":"1ddfb769eb0b8876bc570e25580e6a53afcf973362ee1ee4b54a807da2e5eed7","base64otsfile":"AE9wZW5UaW1lc3RhbXBzAABQcm9vZ...gABYiWDXPXGQEDxNch"}
+```
+
+Proxy response:
+
+```json
+{
+  "method": "ots_verify",
+  "hash": "1ddfb769eb0b8876bc570e25580e6a53afcf973362ee1ee4b54a807da2e5eed7",
+  "result": "success",
+  "message": "Message from OTS client."
+}
+```
+
+```json
+{
+  "method": "ots_verify",
+  "hash": "1ddfb769eb0b8876bc570e25580e6a53afcf973362ee1ee4b54a807da2e5eed7",
+  "result": "pending",
+  "message": "Message from OTS client."
+}
+```
+
+```json
+{
+  "method": "ots_verify",
+  "hash": "1ddfb769eb0b8876bc570e25580e6a53afcf973362ee1ee4b54a807da2e5eed7",
+  "result": "error",
+  "message": "Error message from OTS client."
+}
+```
+
+ots_info)
+  # POST http://192.168.111.152:8080/ots_info
+  # BODY {"hash":"1ddfb769eb0b8876bc570e25580e6a53afcf973362ee1ee4b54a807da2e5eed7"}
+  # BODY {"base64otsfile":"AE9wZW5UaW1lc3RhbXBzAABQcm9vZ...gABYiWDXPXGQEDxNch"}
+  # BODY {"hash":"1ddfb769eb0b8876bc570e25580e6a53afcf973362ee1ee4b54a807da2e5eed7","base64otsfile":"AE9wZW5UaW1lc3RhbXBzAABQcm9vZ...gABYiWDXPXGQEDxNch"}
+
+### Get info an OTS file
+
+Will return the base64 string of the detailed information of the supplied OTS file, or of the local OTS file named after the supplied hash suffixed with .ots.
+
+```http
+POST http://cyphernode:8888/ots_info
+with body...
+{"hash":"1ddfb769eb0b8876bc570e25580e6a53afcf973362ee1ee4b54a807da2e5eed7"}
+or
+{"base64otsfile":"AE9wZW5UaW1lc3RhbXBzAABQcm9vZ...gABYiWDXPXGQEDxNch"}
+or
+{"hash":"1ddfb769eb0b8876bc570e25580e6a53afcf973362ee1ee4b54a807da2e5eed7","base64otsfile":"AE9wZW5UaW1lc3RhbXBzAABQcm9vZ...gABYiWDXPXGQEDxNch"}
+```
+
+Proxy response:
+
+```json
+{
+  "method": "ots_info",
+  "result": "success",
+  "message": "Base64 string of the information text"
+}
+```
diff --git a/doc/openapi/v0/cyphernode-api.yaml b/doc/openapi/v0/cyphernode-api.yaml
index 6ff807e..46e6e81 100644
--- a/doc/openapi/v0/cyphernode-api.yaml
+++ b/doc/openapi/v0/cyphernode-api.yaml
@@ -1391,6 +1391,80 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/ApiResponseTemporarilyUnavailable'
+  /ots_verify:
+    post:
+      tags:
+        - "ots"
+        - "optional features"
+      summary: "Verify an OTS file with hash"
+      description: "If base64 of the OTS file is not supplied, look for local OTS file named after the supplied hash suffixed with .ots."
+      operationId: "otsVerify"
+      requestBody:
+        description: "JSON object containing hash and base64otsfile."
+        required: true
+        content:
+          application/json:
+            schema:
+              type: "object"
+              required:
+                - "hash"
+              properties:
+                hash:
+                  $ref: '#/components/schemas/TypeHashString'
+                base64otsfile:
+                  type: "string"
+      responses:
+        '200':
+          description: "successful operation"
+          content:
+            application/json:
+              schema:
+                # TODO: describe response
+                type: "object"
+        '403':
+          $ref: '#/components/schemas/ApiResponseNotAllowed'
+        '503':
+          description: "Resource temporarily unavailable"
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ApiResponseTemporarilyUnavailable'
+  /ots_info:
+    post:
+      tags:
+        - "ots"
+        - "optional features"
+      summary: "Get information about an OTS file"
+      description: "If base64 of the OTS file is not supplied, look for local OTS file named after the supplied hash suffixed with .ots."
+      operationId: "otsInfo"
+      requestBody:
+        description: "JSON object containing hash and/or base64otsfile."
+        required: true
+        content:
+          application/json:
+            schema:
+              type: "object"
+              properties:
+                hash:
+                  $ref: '#/components/schemas/TypeHashString'
+                base64otsfile:
+                  type: "string"
+      responses:
+        '200':
+          description: "successful operation"
+          content:
+            application/json:
+              schema:
+                # TODO: describe response
+                type: "object"
+        '403':
+          $ref: '#/components/schemas/ApiResponseNotAllowed'
+        '503':
+          description: "Resource temporarily unavailable"
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ApiResponseTemporarilyUnavailable'
   /ots_getfile/{hash}:
     get:
       parameters:
diff --git a/proxy_docker/app/script/ots.sh b/proxy_docker/app/script/ots.sh
index 28b00bf..ef6d243 100644
--- a/proxy_docker/app/script/ots.sh
+++ b/proxy_docker/app/script/ots.sh
@@ -252,11 +252,40 @@ serve_ots_verify() {
   trace "Entering serve_ots_verify()..."
 
   local request=${1}
-  local hash=$(echo "${request}" | jq ".hash" | tr -d '"')
+  local hash
+  hash=$(echo "${request}" | jq -e ".hash")
+  if [ "$?" -ne "0" ]; then
+    # Hash tag null, so there's no hash provided
+    trace "[serve_ots_verify] hash field missing!"
+    echo "{\"method\":\"ots_verify\",\"result\":\"error\",\"message\":\"hash must be provided\"}"
+    return 1
+  else
+    hash=$(echo "${hash}" | tr -d '"')
+  fi
   trace "[serve_ots_verify] hash=${hash}"
-  local base64otsfile=$(echo "${request}" | jq ".base64otsfile" | tr -d '"')
+  local base64otsfile
+  base64otsfile=$(echo "${request}" | jq -e ".base64otsfile")
+  if [ "$?" -ne "0" ]; then
+    # base64otsfile tag null, so there's no base64otsfile provided
+    base64otsfile=
+  else
+    base64otsfile=$(echo "${base64otsfile}" | tr -d '"')
+  fi
   trace "[serve_ots_verify] base64otsfile=${base64otsfile}"
 
+  # If file is provided, we will execute info on it
+  # If file not provided, we will check for hash.ots in our folder and execute info on it
+  if [ -z "${base64otsfile}" ]; then
+    if [ -f otsfiles/${hash}.ots ]; then
+      trace "[serve_ots_verify] Constructing base64otsfile from provided hash, file otsfiles/${hash}.ots"
+      base64otsfile=$(cat otsfiles/${hash}.ots | base64 | tr -d '\n')
+    else
+      trace "[serve_ots_verify] File otsfiles/${hash}.ots does not exists!"
+      echo "{\"method\":\"ots_verify\",\"hash\":\"${hash}\",\"result\":\"error\",\"message\":\"OTS File not found\"}"
+      return 1
+    fi
+  fi
+
   local result
   local message
   local returncode
diff --git a/proxy_docker/app/script/requesthandler.sh b/proxy_docker/app/script/requesthandler.sh
index 1c8bbfe..5bf6771 100644
--- a/proxy_docker/app/script/requesthandler.sh
+++ b/proxy_docker/app/script/requesthandler.sh
@@ -399,8 +399,10 @@ main() {
           ;;
         ots_verify)
           # POST http://192.168.111.152:8080/ots_verify
+          # BODY {"hash":"1ddfb769eb0b8876bc570e25580e6a53afcf973362ee1ee4b54a807da2e5eed7"}
           # BODY {"hash":"1ddfb769eb0b8876bc570e25580e6a53afcf973362ee1ee4b54a807da2e5eed7","base64otsfile":"AE9wZW5UaW1lc3RhbXBzAABQcm9vZ...gABYiWDXPXGQEDxNch"}
 
+          # curl -v -d "{\"hash\":\"a6ea81a46fec3d02d40815b8667b388351edecedc1cc9f97aab55b566db7aac8\"}" localhost:8888/ots_verify
           # curl -v -d "{\"hash\":\"a6ea81a46fec3d02d40815b8667b388351edecedc1cc9f97aab55b566db7aac8\",\"base64otsfile\":\"$(cat a6ea81a46fec3d02d40815b8667b388351edecedc1cc9f97aab55b566db7aac8.ots | base64 | tr -d '\n')\"}" localhost:8888/ots_verify
 
           response=$(serve_ots_verify "${line}")