Etchv vs. HCSM

Add an invisible watermark to images, PDFs and video, then detect it to see which copy was shared. Forensic watermarking API with a free trial. Hello HN!The inspiration for Etchv came directly from friends who raised concerns about the growing ease of unauthorized media copying without attribution. To address this, Etchv embeds an invisible watermark inside images, PDFs, or short videos that survives modifications like screenshots, format changes, and file compression.You can try it on our homepage without signing up. There's also a live demo where a watermarked PDF page gets screenshotted and the watermark ID is still successfully recovered: https://etchv.com/demo/traceInstead of training a model from scratch...

HCSM derives the Standard Model and gravity from one discrete substrate: a periodic 8×8 torus and its Hodge complex. The substrate is fixed by a single theorem; particle-sector empirical anchors are zero. Charge, masses, mixing, graviton, dark energy, and Lorentzian signature all follow, verified at machine precision. - 007STAN/HODGE-COMPLEX-STANDARD-MODEL-HCSM-