Shoot 2025-10-31-114604 — philthompson.me

Birds
Mandel

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Shoot 2025-10-31-114604

I did a little backyard shooting with my 200mm lens, at f/3.5. It works fine for birds in the yard, when I can get close.

On other outings with my normal 200-800 I was able to find some sparrows to shoot: a Fox Sparrow (uncommon here) and a Harris's Sparrow (rare here). I also saw a couple dozen California Quail flying briefly together, which was pretty cool! (I don't know how they're able to run as fast as they do!)

My "birds in review" collages can be found here.

Signature

📄 hashes-2025-10-31-114604.txt

📄 hashes-2025-10-31-114604.txt.sig

The above hashes-<date>.txt file contains SHA-256 hashes of all the photos from this shoot. The hashes-<date>.txt.sig is a signature of that hashes file, created with my PGP key. The signature file itself was written to both the Bitcoin Cash and Algorand blockchains, in the OP RETURN and Note fields respectively, using the transactions below. In short, this proves that these photos and the signature both existed at the time the transactions were written to the Bitcoin Cash and Algorand blockchains. This blog post has more details.

view the BCH tx on blockchair.com: e77bf749ddad5d109042e357a6f3f20bca9b1f36d3eb38aabd1bed5c761fb44d

view the ALGO tx on explorer.perawallet.app: H7R6RTOY2KXLYI2DM5VAXTU7BVSAMRI73HNTMPKDH7QXKB46XDOA