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-2026-0923-W3QJVFRB Content hash e013b987a05bbab91416197433fdc29ed378ff89b07a9a4f90fca51cd7ce178b Articles recorded that day 17 Attestation UID 0x762e6311ed34312a3f3132a6182a8042fbfb824a36d9ae6d78578c9b6b802645 View on EAS Transaction 0xe6f94b9a91b705afc7d83ce1a42a74215dde7d1a18a31b24220210388e2cdc0a View on Basescan Recorded on Base using canonicalization v2 and record format v1.
How this article reaches the blockchain It was combined with the other 16 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 0xa0204925896d04459801d812aa3fa0ec6715a2fd2304f325351777629c7763f4 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 0x310e898cbe6d83a17472a9f3a919afdf5051f385570c524f500c392136e031b2 0x9da449085b0f699baefd102b60266a50e6741040a24f3ff035ee98bd2297623d Step 2, combined with the value before it 0x201d9e8b5b35854af136015b3b87723e422ec6a65d500ff1223de705f1d7a559 0x5d299f76b15d87a285a923ad58638ee9eefc14472d3875e5b932ae939dc96ab7 Step 3, combined with the value before it 0x79c97426b6d5af0c24b132e7c21885809d5aa0e258e0356e29afdfc367a22a3f 0x7dcc8df902700240f2b3ddefd2a04e65571613e3d606be7befe0b477acf5bf39 Step 4, combined with the value before it 0x580d6d082fcf997e54f43a3f5f085f2eb5c5b3cde109d36b33728895d8991e44 0xcc726d408f6663dfb1f79c45763d310611376625219557511a10ed3811ec5e26 Step 5, combined with the value after it 0x84d06f2996b75c16b1c3c5db27e3adbaa6dab69087e72ab178d8fb7e4870e64d 0x0aba8b378f589186a4d34d785b3ad3e11e9061ced9213874765a71427669c3ec This is the value for the whole day.
Value these steps arrive at 0x0aba8b378f589186a4d34d785b3ad3e11e9061ced9213874765a71427669c3ec 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 0x0aba8b378f589186a4d34d785b3ad3e11e9061ced9213874765a71427669c3ec 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-2026-0923-W3QJVFRB/canonical" | shasum -a 256Should print e013b987a05bbab91416197433fdc29ed378ff89b07a9a4f90fca51cd7ce178b
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-2026-0923-W3QJVFRB
CONTENT=e013b987a05bbab91416197433fdc29ed378ff89b07a9a4f90fca51cd7ce178b
DIGEST=$(printf '%s' "$STAMP" | shasum -a 256 | cut -d' ' -f1)
printf '00%s%s' "$DIGEST" "$CONTENT" | xxd -r -p | shasum -a 256Should print a0204925896d04459801d812aa3fa0ec6715a2fd2304f325351777629c7763f4
3. Combine step 1 The value you have goes first, then the published value.
printf '01%s%s' "a0204925896d04459801d812aa3fa0ec6715a2fd2304f325351777629c7763f4" "310e898cbe6d83a17472a9f3a919afdf5051f385570c524f500c392136e031b2" | xxd -r -p | shasum -a 256Should print 9da449085b0f699baefd102b60266a50e6741040a24f3ff035ee98bd2297623d
4. Combine step 2 The published value goes first, then the value you have.
printf '01%s%s' "201d9e8b5b35854af136015b3b87723e422ec6a65d500ff1223de705f1d7a559" "9da449085b0f699baefd102b60266a50e6741040a24f3ff035ee98bd2297623d" | xxd -r -p | shasum -a 256Should print 5d299f76b15d87a285a923ad58638ee9eefc14472d3875e5b932ae939dc96ab7
5. Combine step 3 The published value goes first, then the value you have.
printf '01%s%s' "79c97426b6d5af0c24b132e7c21885809d5aa0e258e0356e29afdfc367a22a3f" "5d299f76b15d87a285a923ad58638ee9eefc14472d3875e5b932ae939dc96ab7" | xxd -r -p | shasum -a 256Should print 7dcc8df902700240f2b3ddefd2a04e65571613e3d606be7befe0b477acf5bf39
6. Combine step 4 The published value goes first, then the value you have.
printf '01%s%s' "580d6d082fcf997e54f43a3f5f085f2eb5c5b3cde109d36b33728895d8991e44" "7dcc8df902700240f2b3ddefd2a04e65571613e3d606be7befe0b477acf5bf39" | xxd -r -p | shasum -a 256Should print cc726d408f6663dfb1f79c45763d310611376625219557511a10ed3811ec5e26
7. Combine step 5 The value you have goes first, then the published value.
printf '01%s%s' "cc726d408f6663dfb1f79c45763d310611376625219557511a10ed3811ec5e26" "84d06f2996b75c16b1c3c5db27e3adbaa6dab69087e72ab178d8fb7e4870e64d" | xxd -r -p | shasum -a 256Should print 0aba8b378f589186a4d34d785b3ad3e11e9061ced9213874765a71427669c3ec
8. 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/0x762e6311ed34312a3f3132a6182a8042fbfb824a36d9ae6d78578c9b6b802645The rules these commands follow are written down in full, so anyone can reimplement them.
Read the specification