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Tim Bray

@tbray.org

5.9K followers 200 following 390 posts

Web geek and environmentalist with a camera at the bottom left corner of Canada. He/him. I’m mainly on Fedi, @cosocial.ca@timbray. On this account I mostly post #blueskyabove photos; for more, if you’re not on Fedi try @timbray.cosocial.ca.ap.brid.gy

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Tim Bray @tbray.org · 3d

Check out the “Nadia story”, and an explanation of how we can make it easier to tell when media is faked and when it’s real, with existing technology: www.tbray.org/ongoing/When...

Social Media Provenance Challenge

www.tbray.org

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Reposted by Tim Bray

Governor JB Pritzker @govpritzker.illinois.gov · 4d

Yesterday, Kristi Noem’s and Greg Bovino’s masked agents threw chemical agents near an elementary school, arrested elected officials exercising their First Amendment rights, and raided a Wal-Mart.

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Reposted by Tim Bray

Tim Bray @timbray.cosocial.ca.ap.brid.gy · 7d

In which I (probably foolishly) make a bunch of predictions about the future of #genai: https://www.tbray.org/ongoing/When/202x/2025/09/26/GenAI-Predictions

GenAI Predictions

www.tbray.org

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Tim Bray @tbray.org · 9d

How is your test coverage?

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Tim Bray @tbray.org · 11d

I think you should, in your capacity as a person who has a thorough understanding of infrastructure dynamics.

Tim Bray @tbray.org · 11d

consider signing up to github.com/Plan-Vert/op...

GitHub - Plan-Vert/open-letter: An open letter calling for a hard fork of Rails to remove DHH's influence

An open letter calling for a hard fork of Rails to remove DHH's influence - Plan-Vert/open-letter

github.com

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Tim Bray @tbray.org · 12d

Does Bluesky Social PBC publish any financial disclosures? I'm super interested in the economics of post-Twitter decentralized social media. (I'm similarly poking around the Fediverse and OMG it's complicated.)

Reposted by Tim Bray

Tim Bray @timbray.cosocial.ca.ap.brid.gy · 13d

Last week I gave a talk at the IPTC’s “Photo Metadata Conference”. Here’s a blog-ified version, with lots of juicy digging into exactly what works and what’s broken in C2PA in 2025. Also strong opinions about provenance. And a link to the YouTube recording […]

[Original post on cosocial.ca]

Photo in a shopping mall in Sydney, Australia, which includes Content Credentials.

Content Credentials display provided by Lightroom describing the editing of a photograph.

Contributor details: Information shared by people involved in making this content

Produced by

Timothy Bray
@Instagram twbray
@LinkedIn Tim Bray

Content Details
Information about this content and how it was made.

App or device used

Lightroom Classic 14.5.1

Recorded by

Adobe Inc. on Sep 9, 2025

Actions

Color or exposure edits
Adjusted properties like tone, saturation, curves, shadows, or highlights
Cropping Edits
Used cropping tools, reducing or expanding visible content area
Opened
Opened a pre-existing file
Ingredients
L100004.DNG
Recorded by Leica Camera AG

Photograph taken with a Google Pixel 10 of objects on a desktop: A small black statuette of Budai, a crystal ball, and the base of a wooden lamp. Two wooden shafts appear in the background, but their nature is a mystery.

The photo has been edited using Google's Magic Erase and that fact is disclosed in its Content Credentials.

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Tim Bray @tbray.org · 15d

Cool. My sympathies at having to work with the I-D toolchain for Markdown.

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Tim Bray @tbray.org · 15d

If you get an AT WG, you'll probably end up putting the docs in a GitHub repo. Some WGs don’t do that but most do, these days. It *might* be useful to get ahead of the game and do that now. Possibly you'd get useful issues raised.

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Tim Bray @tbray.org · 22d

This Thu is the “IPTC Photo Metadata Conference 2025”, a free Zoom event open to all. I’m a speaker ( on #C2PA). Looks like it should be interesting for anyone interested in the tangle of issues about media provenance, #genAI, publishing workflow, social media, and so on.
iptc.org/events/photo...

Photo Metadata Conference 2025 - IPTC

IPTC is the global standards body of the news media. We provide the technical foundation for the news ecosystem.

iptc.org

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Reposted by Tim Bray

50501 Chicago @50501chicago.bsky.social · Sep 6

We are ready.

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Reposted by Tim Bray

Tim Bray @timbray.cosocial.ca.ap.brid.gy · Sep 6

Got bright Maritime colors if you want ’em: https://www.tbray.org/ongoing/When/202x/2025/09/01/Maritime-Colors

#maritimes #photography

On the oceanfront, a small shed is covered with many brightly colored boat fenders. Also in the picture: Some vacation trailers, a statue of a horse and carriage, and a small front-lawn lighthouse decoration.

A Prince Edward Island oceanfront shot, with the sand and water being surprisingly red.

Three houses in Lunenberg, Nova Scotia, brightly colored in green, orange, and violet-red.

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Tim Bray @tbray.org · Sep 6

Heh, can't say I remember that one.

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Tim Bray @tbray.org · Sep 5

If you do rev the firmware I'd be interested in what the experience is, not obvious to me what "registered media" means.

Tim Bray @tbray.org · Sep 4

That would be lovely, but unfortunately I think they require you to be a member of a registered media organization to use it, based on my reading of the release notes.

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Tim Bray @tbray.org · Sep 4

Due to my persistent yelling about C2PA and provenance, I’ve been invited to speak at the IPTC Photo Metadata Conference 2025: iptc.org/events/photo-metadata - September 18th.

It’s a free Zoom thing, so if you’re interested in this stuff, sign up and drop by.

iptc.org

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Reposted by Tim Bray

Tim Bray @timbray.cosocial.ca.ap.brid.gy · Sep 3

I'm still digging into #c2pa and have a problem: I don’t have a camera that is equipped. If anyone reading this has such a camera, I’d sure appreciate it if they could take a picture of, well, anything, with embedded C2PA, and shoot me a copy. Should the work ever go public, I’d provide […]

Original post on cosocial.ca

cosocial.ca

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Tim Bray @timbray.cosocial.ca.ap.brid.gy · Aug 31

About birds, bees, a lovely garden, and a remarkable old lens: https://www.tbray.org/ongoing/When/202x/2025/08/30/Maritime-Wildlife

#photography #maritimes

A bee captured in flight looks ridiculously surprised.

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Reposted by Tim Bray

Tim Bray @timbray.cosocial.ca.ap.brid.gy · Aug 28

Just came back from vacation in Canada’s Maritimes. Doesn’t mean I have any insights to offer about the area, but it’s super photogenic and my blog is going to be bulging with pictures over the next few days. Starting here: https://www.tbray.org/ongoing/When/202x/2025/08/27/Maritime-Vacation

Looking across the ocean at a shoreline with houses along the waterfront, rising wooded hills behind, blue sky above.

On a very calm lake, a cluster of kids horsing around make circular ripples. In the background, forested lands and a blue sky.

A wide expanse of waterfront exposed by low tide, the sun is low and casts my shadow across the rocky surface.

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Reposted by Tim Bray

Tim Bray @timbray.cosocial.ca.ap.brid.gy · Aug 23

Three small announcements:
1. RFC 9839, a guide to which Unicode characters you should never use: https://www.rfc-editor.org/rfc/rfc9839.html
2. Blog piece with background and context, “RFC 9839 and Bad Unicode”: https://www.tbray.org/ongoing/When/202x/2025/08/14/RFC9839
3. A little Go library […]

Original post on cosocial.ca

cosocial.ca

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Tim Bray @timbray.cosocial.ca.ap.brid.gy · Jul 29

Progress report on our family De-Googling project: https://www.tbray.org/ongoing/When/202x/2025/07/29/DeGoogling

#google

De-Google Project Update

www.tbray.org

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Tim Bray @tbray.org · Jul 29

Would not trust. Feels like an opportunity for pervasive global corruption. Surely the SEO wars have taught us that businesses will do *anything*, ethics be damned, to game their online reputation?

Safari looking better all the time.

Reposted by Tim Bray

Tim Bray @timbray.cosocial.ca.ap.brid.gy · Jul 16

Visited my 95-year-old Mom in Saskatchewan and came away with Prairie pictures and thoughts on memory and topography and Google color science and healthcare economics. https://www.tbray.org/ongoing/When/202x/2025/07/09/Saskatchewan

#photography #saskatchewan

The sky, between dark trees, is full of blue and pink color at sunset.

A gravel road goes straight away and uphill over the horizon. To its left, a row of telephone poles. Above, richly-blue sky. To either side, brilliant yellow canola flowers. On the horizon the right, a cluster of trees and buildings marks a farm.

A red neon sign, all-caps, in swirling lines that suggest the stripes of a flag, reads "EVERY AMERICAN FLAG IS A WARNING SIGN".

A large room with large and colorful artworks on its wall.

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Tim Bray @timbray.cosocial.ca.ap.brid.gy · Jul 6

In which I argue that arguments about whether #genai is useful or not are the wrong arguments. The important issues are what it’s for and what it costs.

Having very unkind feelings about the people pushing it.

https://www.tbray.org/ongoing/When/202x/2025/07/06/AI-Manifesto

The Real GenAI Issue

www.tbray.org

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