Every day sebbi.pro writes one file holding every public block of its chain, a Bitcoin proof, and the program that checks it. That file is copied out to places sebbi.pro does not control. Each copy proves itself, anywhere, with nothing from sebbi.pro, so the evidence outlives any single server, company or data centre.
SEBBI.PRO PROOF 2026-10-12 | ARCHIVE bc36c22a61f1c11b02699f84c63362a128c2e5311eb4ba5fc803a4d68d057116 | TIP d3080786b69b38d8 | BLOCK 14009 | CHECK sebbi.pro/x/archive/spec
Any public GitHub repository: add this workflow. Every day it fetches the file, runs the checker inside it, and keeps it only if it passes. Then register your copy at /x/custody to be counted.
Any feed reader: subscribe to the checkpoint feed.
Anywhere at all: today's checkpoint fits in one line: a text, a QR code, a radio bulletin, a printed page.
python3 -c "import json,sys;exec(json.load(open(sys.argv[1]))['verifier_py'])" FILE
Only public evidence is copied: the same public blocks the archive already publishes, never customers' content. The count of independent copies is itself sealed every day at /x/custody/status.