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-2026-0907-JD5QR3L4 Content hash 75ca4b168ea4a3612272dfb32a23b92cdcdfec327eb4f437f28b0245bebd55ca 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 0x72e4515d3a8e399cd0089badf6928f716b5ec68ed17ddfcdf01cbed143802746 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 0xf194ef5c9148452a57c4d68df53ef8e7af4543cc713f8b99de8a2cca36380ebf 0x003ff8d74fd977087f9189ed00aceb151841e978820e86ed3bfdbedc2b73d6c9 Step 2, combined with the value before it 0x929279eac13d75f39c15a12440ccb504f6913da183e409036bc41c5533b529fb 0xb1f432f31b9d7f2ee90004756de32083ed77dc4dd0e0c5dde26c0455101f1ebd Step 3, combined with the value after it 0xeee5a3c26626fad395fb57118b63a88f1e80f6b66e4305711507f83dc2625b44 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-2026-0907-JD5QR3L4/canonical" | shasum -a 256Should print 75ca4b168ea4a3612272dfb32a23b92cdcdfec327eb4f437f28b0245bebd55ca
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-2026-0907-JD5QR3L4
CONTENT=75ca4b168ea4a3612272dfb32a23b92cdcdfec327eb4f437f28b0245bebd55ca
DIGEST=$(printf '%s' "$STAMP" | shasum -a 256 | cut -d' ' -f1)
printf '00%s%s' "$DIGEST" "$CONTENT" | xxd -r -p | shasum -a 256Should print 72e4515d3a8e399cd0089badf6928f716b5ec68ed17ddfcdf01cbed143802746
3. Combine step 1 The value you have goes first, then the published value.
printf '01%s%s' "72e4515d3a8e399cd0089badf6928f716b5ec68ed17ddfcdf01cbed143802746" "f194ef5c9148452a57c4d68df53ef8e7af4543cc713f8b99de8a2cca36380ebf" | xxd -r -p | shasum -a 256Should print 003ff8d74fd977087f9189ed00aceb151841e978820e86ed3bfdbedc2b73d6c9
4. Combine step 2 The published value goes first, then the value you have.
printf '01%s%s' "929279eac13d75f39c15a12440ccb504f6913da183e409036bc41c5533b529fb" "003ff8d74fd977087f9189ed00aceb151841e978820e86ed3bfdbedc2b73d6c9" | xxd -r -p | shasum -a 256Should print b1f432f31b9d7f2ee90004756de32083ed77dc4dd0e0c5dde26c0455101f1ebd
5. Combine step 3 The value you have goes first, then the published value.
printf '01%s%s' "b1f432f31b9d7f2ee90004756de32083ed77dc4dd0e0c5dde26c0455101f1ebd" "eee5a3c26626fad395fb57118b63a88f1e80f6b66e4305711507f83dc2625b44" | xxd -r -p | shasum -a 256Should print 2caabb0d80f37740a8cad7eda8118936f113d946a9a532acca7d7458790c3b08
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/0x72fb820f58a8150de469ea4433fbf6e5bed11fe55b31d486beeb263724f9c68fThe rules these commands follow are written down in full, so anyone can reimplement them.
Read the specification