From bda38ca96d92f9a59ebe79334c568abee3f944d6 Mon Sep 17 00:00:00 2001
From: Sagar Pandey <aigeano@gmail.com>
Date: Tue, 11 Aug 2026 14:06:04 +0200
Subject: [PATCH 1/2] Add Sigi invisible watermarking engine (io.diker.sigi.v1)

Sigi is an invisible watermarking engine by Okeanos B.V.,
a C2PA Conforming Implementer with two conformant Generator
Products (Artimis, Diker). Sigi embeds an imperceptible
forensic watermark in pixel data for provenance recovery
after metadata stripping.
---
 softbinding-algorithm-list.json | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/softbinding-algorithm-list.json b/softbinding-algorithm-list.json
index 207fe74..3ff3283 100755
--- a/softbinding-algorithm-list.json
+++ b/softbinding-algorithm-list.json
@@ -770,5 +770,19 @@
         "softBindingResolutionApis": [
             "https://api.joinmonolith.com/api/c2pa"
         ]
+    },
+    {
+        "identifier": 49,
+        "alg": "io.diker.sigi.v1",
+        "type": "watermark",
+        "decodedMediaTypes": [
+            "image"
+        ],
+        "entryMetadata": {
+            "description": "Sigi invisible watermarking engine by Okeanos B.V.",
+            "dateEntered": "2026-08-11T00:00:00.000Z",
+            "contact": "support@diker.io",
+            "informationalUrl": "https://diker.io/sigi"
+        }
     }
 ]

From 637d5b588848a9993e500d5f73d669ac2c81419e Mon Sep 17 00:00:00 2001
From: Dominique Guinard <dom@guinard.org>
Date: Wed, 19 Aug 2026 12:22:30 +0200
Subject: [PATCH 2/2] Update softbinding-algorithm-list.json

---
 softbinding-algorithm-list.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/softbinding-algorithm-list.json b/softbinding-algorithm-list.json
index 3ff3283..b402927 100755
--- a/softbinding-algorithm-list.json
+++ b/softbinding-algorithm-list.json
@@ -772,7 +772,7 @@
         ]
     },
     {
-        "identifier": 49,
+        "identifier": 51,
         "alg": "io.diker.sigi.v1",
         "type": "watermark",
         "decodedMediaTypes": [