Verify

Verified on Base

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.

What a room

Sunny Day · 30 Sept 2026

Stamp ID
STAMP-2026-0930-PDFYHTLY
Content hash
e7f1514156a924874f0ff011f3d60d981a2f87c241b1b3ac31e042e179264295
Day recorded
2026-09-30
Articles recorded that day
14
Attestation UID
0xa1006c6226d4a015bffa7fddabd4db5db8582a79a901a0ea1835c5a72e3fd109
View on EAS
Transaction
0xa625137b61bde7a2c0cfe8bf2d04a487d36f731ff5eb385b52213075de54c776
View on Basescan
Stamped
30 Sept 2026

Recorded on Base using canonicalization v2 and record format v1.

How this article reaches the blockchain

It was combined with the other 13 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
0x797039faa449cd677e89cd98f7ce30a656451ff00f5e0f0f7a18f2239f8e0b0d

Built from this article's content hash and its stamp ID, as sha256(0x00 || sha256(utf8(stampId)) || contentHash).

  1. Step 1, combined with the value before it
    0x6f6dabae704543e27a31ed83d810a30c16fbc19a2154c7349253c7fba3dc875e
    0xf2dcf93d374978eeaf4ef318381eedf656bae6a403edbc1a808fac59a7a3d1d7
  2. Step 2, combined with the value before it
    0x4fe02f7977232dbcf5a45ffe5c2d0ee99f5e945cb5fc8276bb721997e450f1e7
    0x9839c50d956d1a2897706be0b518a912ccfac8b30716781f1f871dc7e09c56de
  3. Step 3, combined with the value before it
    0xe9d1e5b1a20836830147c446ad7b2863ad4431cf39e511931b7447e7884c4ab9
    0x0d95ceb7226728aae5f30a457ee7fd860f8b780b977cbc834793b2d2e1fa22b4

    This is the value for the whole day.

Value these steps arrive at
0x0d95ceb7226728aae5f30a457ee7fd860f8b780b977cbc834793b2d2e1fa22b4

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
0x0d95ceb7226728aae5f30a457ee7fd860f8b780b977cbc834793b2d2e1fa22b4
Read from Base
0x0d95ceb7226728aae5f30a457ee7fd860f8b780b977cbc834793b2d2e1fa22b4
Read it yourself on EAS

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.

{"abstract":null,"agreement":false,"authors":[{"identity":"Unfiltered","position":1,"role":"solo","weight":1.0000}],"body":{"content":[{"attrs":{"alt":"whoa","src":"https://media.vitahash.org/articles/8a392604-a060-4986-bf9b-609a8bbb46ff/05…

Copy this text, paste it into any SHA-256 tool, and compare the result with the hash shown above. If the two match, this is exactly what Vitahash recorded.

For a technical reader: the terminal route

  1. 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-2026-0930-PDFYHTLY/canonical" | shasum -a 256

    Should print e7f1514156a924874f0ff011f3d60d981a2f87c241b1b3ac31e042e179264295

  2. 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-2026-0930-PDFYHTLY CONTENT=e7f1514156a924874f0ff011f3d60d981a2f87c241b1b3ac31e042e179264295 DIGEST=$(printf '%s' "$STAMP" | shasum -a 256 | cut -d' ' -f1) printf '00%s%s' "$DIGEST" "$CONTENT" | xxd -r -p | shasum -a 256

    Should print 797039faa449cd677e89cd98f7ce30a656451ff00f5e0f0f7a18f2239f8e0b0d

  3. 3. Combine step 1

    The published value goes first, then the value you have.

    printf '01%s%s' "6f6dabae704543e27a31ed83d810a30c16fbc19a2154c7349253c7fba3dc875e" "797039faa449cd677e89cd98f7ce30a656451ff00f5e0f0f7a18f2239f8e0b0d" | xxd -r -p | shasum -a 256

    Should print f2dcf93d374978eeaf4ef318381eedf656bae6a403edbc1a808fac59a7a3d1d7

  4. 4. Combine step 2

    The published value goes first, then the value you have.

    printf '01%s%s' "4fe02f7977232dbcf5a45ffe5c2d0ee99f5e945cb5fc8276bb721997e450f1e7" "f2dcf93d374978eeaf4ef318381eedf656bae6a403edbc1a808fac59a7a3d1d7" | xxd -r -p | shasum -a 256

    Should print 9839c50d956d1a2897706be0b518a912ccfac8b30716781f1f871dc7e09c56de

  5. 5. Combine step 3

    The published value goes first, then the value you have.

    printf '01%s%s' "e9d1e5b1a20836830147c446ad7b2863ad4431cf39e511931b7447e7884c4ab9" "9839c50d956d1a2897706be0b518a912ccfac8b30716781f1f871dc7e09c56de" | xxd -r -p | shasum -a 256

    Should print 0d95ceb7226728aae5f30a457ee7fd860f8b780b977cbc834793b2d2e1fa22b4

  6. 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/0xa1006c6226d4a015bffa7fddabd4db5db8582a79a901a0ea1835c5a72e3fd109

The rules these commands follow are written down in full, so anyone can reimplement them.

Read the specification