{"id":13,"date":"2026-07-23T12:31:34","date_gmt":"2026-07-23T12:31:34","guid":{"rendered":"http:\/\/news.oddr.org\/?p=13"},"modified":"2026-07-23T12:31:34","modified_gmt":"2026-07-23T12:31:34","slug":"we-pushed-4000-signed-assets-through-eight-platforms","status":"publish","type":"post","link":"https:\/\/news.oddr.org\/?p=13","title":{"rendered":"We pushed 4,000 signed assets through eight platforms"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">There is a lot of confident commentary about which platforms preserve Content Credentials and which destroy them. Very little of it is measured. We decided to measure it.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Method<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">We produced 4,000 signed assets: 3,200 stills across four formats, and 800 short videos. Each was uploaded to eight platforms through the normal consumer path, downloaded again, and checked for an intact manifest, a recoverable soft binding, or nothing at all.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Every upload was repeated three times over six weeks, because platform behaviour changes without announcement and a single run tells you about a single day.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Results<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Stills: full manifest survived on two of eight platforms. Soft binding recoverable on five.<\/li>\n\n<li>Video: full manifest survived on none. Soft binding recoverable on two, and only for clips over twenty seconds.<\/li>\n\n<li>One platform preserved manifests on stills consistently across all three runs, which was not the one we expected.<\/li>\n\n<li>Two platforms changed behaviour mid study, both in the direction of stripping more.<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">The variance between runs was larger than the variance between platforms. That is the finding that should worry people.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">What surprised us<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The assumption that image formats behave similarly is wrong. One format lost its manifest on six platforms while a visually identical export in another format survived on four. The difference is entirely in how each platform normalises on ingest.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Short video is close to hopeless today. If your work is video first, a signed original on a domain you control is not a nice extra, it is the only durable claim you have.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Limitations<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Consumer upload paths only. No business APIs, which often behave differently and usually better. Results are a snapshot of a moving target, and we will rerun this in six months.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The dataset and the harness are available to researchers on request.<\/p>\n\n\n","protected":false},"excerpt":{"rendered":"<p>Metadata survival rates, measured rather than assumed. The results were worse than we expected on video and better than we expected on one platform nobody talks about.<\/p>\n","protected":false},"author":1,"featured_media":14,"comment_status":"open","ping_status":"open","sticky":false,"template":"template-immersive.php","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[14,13],"class_list":["post-13","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-research","tag-platforms","tag-research"],"jetpack_featured_media_url":"https:\/\/news.oddr.org\/wp-content\/uploads\/2026\/08\/cover-research.png","_links":{"self":[{"href":"https:\/\/news.oddr.org\/index.php?rest_route=\/wp\/v2\/posts\/13","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/news.oddr.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/news.oddr.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/news.oddr.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/news.oddr.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=13"}],"version-history":[{"count":0,"href":"https:\/\/news.oddr.org\/index.php?rest_route=\/wp\/v2\/posts\/13\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/news.oddr.org\/index.php?rest_route=\/wp\/v2\/media\/14"}],"wp:attachment":[{"href":"https:\/\/news.oddr.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=13"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/news.oddr.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=13"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/news.oddr.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=13"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}