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-VCXJYOWZ Content hash 7cd6de64788540c5b4e763b4f63db51b414fbfcb702d036d9056f4867ae457c4 Articles recorded that day 5 Attestation UID 0x041787fece6c3c97abcdbdfd65d43fd8125061a1f4e92a7f5c47448ecdc8af04 View on EAS Transaction 0xd71488576af19f7a6acb3cc7cb24389b2387be4a2954deaab8ebbf837587d546 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 0xa9ef9d14af2276045db23fb862163a459156988b9ef9e47a3ec7d6f6d96e91c9 Built from this article's content hash and its stamp ID, as sha256(0x00 || sha256(utf8(stampId)) || contentHash).
Step 1, combined with the value after it 0x573d97052f719372b975126cbc095b8b87b25f2d3c8af808a84d41a3ec9a2265 0x8a9e14acf6fe0c47f83b59044352044477b85f139fb9df4efb8df3166759691d Step 2, combined with the value before it 0xc06d3d56f4fff8ede166ce30e481a37cd1599bced0921dec2ba234be914bba86 0xc0eb5b9d3eff694e69f590bdf1c8e7b36646323f2e99099db557d9a9ece7da07 Step 3, combined with the value after it 0x1b30e5f2d6a413c35cae4be57ffcb0f83ac838f84cc8e682af6a227dfeace9a9 0x23b3eacc7f982828bd99a6eb6700f18b9ee256884eaea95068e33ee081173789 This is the value for the whole day.
Value these steps arrive at 0x23b3eacc7f982828bd99a6eb6700f18b9ee256884eaea95068e33ee081173789 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 0x23b3eacc7f982828bd99a6eb6700f18b9ee256884eaea95068e33ee081173789 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-VCXJYOWZ/canonical" | shasum -a 256Should print 7cd6de64788540c5b4e763b4f63db51b414fbfcb702d036d9056f4867ae457c4
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-VCXJYOWZ
CONTENT=7cd6de64788540c5b4e763b4f63db51b414fbfcb702d036d9056f4867ae457c4
DIGEST=$(printf '%s' "$STAMP" | shasum -a 256 | cut -d' ' -f1)
printf '00%s%s' "$DIGEST" "$CONTENT" | xxd -r -p | shasum -a 256Should print a9ef9d14af2276045db23fb862163a459156988b9ef9e47a3ec7d6f6d96e91c9
3. Combine step 1 The value you have goes first, then the published value.
printf '01%s%s' "a9ef9d14af2276045db23fb862163a459156988b9ef9e47a3ec7d6f6d96e91c9" "573d97052f719372b975126cbc095b8b87b25f2d3c8af808a84d41a3ec9a2265" | xxd -r -p | shasum -a 256Should print 8a9e14acf6fe0c47f83b59044352044477b85f139fb9df4efb8df3166759691d
4. Combine step 2 The published value goes first, then the value you have.
printf '01%s%s' "c06d3d56f4fff8ede166ce30e481a37cd1599bced0921dec2ba234be914bba86" "8a9e14acf6fe0c47f83b59044352044477b85f139fb9df4efb8df3166759691d" | xxd -r -p | shasum -a 256Should print c0eb5b9d3eff694e69f590bdf1c8e7b36646323f2e99099db557d9a9ece7da07
5. Combine step 3 The value you have goes first, then the published value.
printf '01%s%s' "c0eb5b9d3eff694e69f590bdf1c8e7b36646323f2e99099db557d9a9ece7da07" "1b30e5f2d6a413c35cae4be57ffcb0f83ac838f84cc8e682af6a227dfeace9a9" | xxd -r -p | shasum -a 256Should print 23b3eacc7f982828bd99a6eb6700f18b9ee256884eaea95068e33ee081173789
6. 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/0x041787fece6c3c97abcdbdfd65d43fd8125061a1f4e92a7f5c47448ecdc8af04The rules these commands follow are written down in full, so anyone can reimplement them.
Read the specification