=== HTTP code : 200 ===

Response headers
================
HTTP/2 200 
date: Thu, 25 May 2023 00:52:50 GMT
content-type: application/pdf
content-length: 184292
last-modified: Mon, 01 May 2023 22:14:57 GMT
etag: &quot;645039e1-2cfe4&quot;
strict-transport-security: max-age=31536000; includeSubDomains; preload
content-security-policy: script-src 'self' www.google-analytics.com blockchain.info 'unsafe-inline'
accept-ranges: bytes
cf-cache-status: DYNAMIC
server: cloudflare
cf-ray: 7cc9cc493be82aa0-LAX

Request headers
================
HEAD /bitcoin.pdf HTTP/2
Host: bitcoin.org
user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.34 Safari/537.36
accept: */*
referer: https://cryptogrizz.com
connection: close


Link is valid.