harpercollins.com

Observed Aug 11, 2026, 12:28 UTC (7d ago). Every field below was attested with an Ed25519 signature at scan time.

This reading of harpercollins.com was taken 7d ago

harpercollins.com is on the survey sweep, which works its way across the whole catalog rather than returning to one name on a schedule. Putting harpercollins.com under watch moves it to the fast lane, where DomainDrift re-checks it about every 5 minutes and signs each reading, so a change becomes a dated event within minutes instead of waiting for the sweep to come round.

Watch harpercollins.com Watching a domain needs a DRM3 account. The reading above stays free and public either way.
Up right now
Runs onCloudflare
Email byProofpoint
Secured byDigiCert
Registered withMarkMonitor Inc.
Also usesAtlassianGlobalSignZoomDockerGoogle Search ConsoleDocuSignFigmaYahoo
1 subdomain · media_entertainment
Every line above is a signed observation. Check the math at the bottom of the page.
DRIFT

Steady. No change on record for harpercollins.com in the last day; this reading matches the one before it. The steady record is signed like every other reading. Watch it to catch the next move the moment it lands.

SIGNED-OUT VIEW Provider names, posture and counts are shown. The record values - every DNS answer, each subdomain hostname, raw TXT, IPs, cert names and WHOIS - are the product. Sign in for the full signed record, or use the API with a key.

DNS records 42

A1NS2MX2TXT33SRV3SOA1

TLS certificates 3

Issued byDigiCert
ExpiresSun, 06 De (110d)
Certificate nameswithheld

Subdomains 1

1 subdomain hostname observed and signed - the list itself is part of the paid record.

The proof

Signed at scan time. Check the math yourself. Every line above is part of one signed observation. Re-hash it and check the Ed25519 signature in your own browser; the only network request the check makes is for the published public keys.

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Ed25519 Receipt

Receipt ID
rcpt_f84a6115082f8707
Output Hash
b1ab5b0a4daf9f6c9c9aae87ec630c868a3c4e61687eb1890183d0818d6b4287
Signature
ed25519:9536314bd4e8e9496b42b913f2befe48220dcf3084cb1a883e0c0cb7ed6024c14e2af1772f29e302bad18d94b998ba17c01ef2171acf2fbe8a288431e3ddaf01
Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent
(genesis)
Plane
fast
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CONTINUOUS INTERNET TELEMETRY24H DRIFT20,413 material changesacross 15,807 domains · 24h to ~70m ago · -20,838 vs yesterdayROTATION75 domains moved DNS from kirklanddc.com to magpiedns.com, 72 moved backa rotation loop, not a migration · 24hNOW486 curated domains not reachablelast probe, steadySITE ERRORS33,782 sites serving errorslast probe · 5xx / 404 / TLSBOT DEFENSEbot defense observed on 116,237 sites429 rate-limit / 403 bot-block, a posture signal