This article has not changed since Vitahash recorded it on the Base blockchain. Everything below can be checked without taking our word for any of it.
Stamp ID STAMP-2026-0908-XUFFDBN3 Content hash a7fc42056c0171fed8b3c5d8fd860fcc3a2225fe3b8d7ec7b69ff713873ae8cf Articles recorded that day 5 Attestation UID 0x72fb820f58a8150de469ea4433fbf6e5bed11fe55b31d486beeb263724f9c68f View on EAS Transaction 0xebf9684446fbc30b804fe369ea7becf57e130f1b21b31ab6db7c5855d9f4e956 View on Basescan Recorded on Base using canonicalization v1 and record format v1.
How this article reaches the blockchain It was combined with the other 4 articles published that day, one step at a time, until the whole day became a single value. That one value is what Vitahash wrote to the blockchain. Change a single character of this article and the starting value below changes, so none of the steps would land on the recorded one.
Starting value for this article 0xeee5a3c26626fad395fb57118b63a88f1e80f6b66e4305711507f83dc2625b44 Built from this article's content hash and its stamp ID, as sha256(0x00 || sha256(utf8(stampId)) || contentHash).
Step 1, combined with the value before it 0xb1f432f31b9d7f2ee90004756de32083ed77dc4dd0e0c5dde26c0455101f1ebd 0x2caabb0d80f37740a8cad7eda8118936f113d946a9a532acca7d7458790c3b08 This is the value for the whole day.
Value these steps arrive at 0x2caabb0d80f37740a8cad7eda8118936f113d946a9a532acca7d7458790c3b08 What the blockchain says Two values, reached two different ways. The one above was worked out from this article. The one below was read back from the record on Base.
Worked out from this article 0x2caabb0d80f37740a8cad7eda8118936f113d946a9a532acca7d7458790c3b08 They are the same value, so this article was published that day with exactly the text above.
Check it yourself Every number on this page came from Vitahash. Copy the article's exact text below and check it against the hash above, using any SHA-256 tool.
The exact text is not available for this article right now. The command below still reaches it.
1. Hash the article yourself This downloads the exact text Vitahash hashed, in the exact form it hashed it, and hashes it again on your machine. Nothing Vitahash wrote runs here.
curl -s "https://api.vitahash.org/api/verify/STAMP-2026-0908-XUFFDBN3/canonical" | shasum -a 256Should print a7fc42056c0171fed8b3c5d8fd860fcc3a2225fe3b8d7ec7b69ff713873ae8cf
2. Build this article's starting value The stamp ID is folded in with the hash, so one article's record can never stand in for another's.
STAMP=STAMP-2026-0908-XUFFDBN3
CONTENT=a7fc42056c0171fed8b3c5d8fd860fcc3a2225fe3b8d7ec7b69ff713873ae8cf
DIGEST=$(printf '%s' "$STAMP" | shasum -a 256 | cut -d' ' -f1)
printf '00%s%s' "$DIGEST" "$CONTENT" | xxd -r -p | shasum -a 256Should print eee5a3c26626fad395fb57118b63a88f1e80f6b66e4305711507f83dc2625b44
3. Combine step 1 The published value goes first, then the value you have.
printf '01%s%s' "b1f432f31b9d7f2ee90004756de32083ed77dc4dd0e0c5dde26c0455101f1ebd" "eee5a3c26626fad395fb57118b63a88f1e80f6b66e4305711507f83dc2625b44" | xxd -r -p | shasum -a 256Should print 2caabb0d80f37740a8cad7eda8118936f113d946a9a532acca7d7458790c3b08
4. Compare with the blockchain The last value above is what the whole day came to. Read the record on Base and check its merkleRoot field is the same. Vitahash is not involved in this step at all.
https://base.easscan.org/attestation/view/0x72fb820f58a8150de469ea4433fbf6e5bed11fe55b31d486beeb263724f9c68fThe rules these commands follow are written down in full, so anyone can reimplement them.
Read the specification