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Articles and notes from the person building Sellat: real cases, practical criteria and jargon-free explanations.
October 21, 2026 Sellat is now available in the ChatGPT plugin directory. From now on, you can create proof of existence for your files, access their…
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Six months later An AI agent writes the condition report for a flat, saves it as a PDF and sends it to the landlord. Nobody reads it closely; that is what the…
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Today, 8 October 2026, we are starting an experiment at Sellat: checking the price of three products until Black Friday 2026 and recording every change in a…
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Hoy, 8 de octubre de 2026, empezamos un experimento en Sellat: comprobar el precio de tres productos hasta Black Friday 2026 y registrar cada cambio en un…
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Sí. Un sello de tiempo electrónico puede aportarse como prueba en un procedimiento judicial. Si es cualificado conforme al Reglamento eIDAS, cuenta además con…
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A timestamping API does one thing: it takes the SHA-256 hash of a file and fixes it to a date that no one can alter, so that two years from now you can prove…
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To reconstruct an acceptance on solid ground, keeping a simple “yes” is not enough. At the very least, you need to keep: The problem appears when all of that…
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eIDAS vs. RFC 3161: How Digital Timestamps Work in Europe, the United States and Canada When we talk about proving that a file existed at a specific point in…
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This week, during a conversation about digital evidence, someone suggested an interesting combination: a camera that digitally signs each photo using the C2PA…
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Damage appears and the argument begins: who caused it, when, who pays. Damage verification has two halves. The first is confirming the damage. The second is…
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An image with C2PA credentials goes into WhatsApp. The image comes out. The credential does not. It sounds like a joke, but it sums up one of the main problems…
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The question usually starts like this: “Does VeriFactu become mandatory in 2026 or 2027?” The confusion is understandable. The rules have been postponed more…
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There’s a strange feeling that more and more creators are starting to notice. Before, when someone copied you, at least it took some effort. Not anymore. With…
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