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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.

🎃 One of NYC’s coolest fall events is Pumpkin Point on Governors Island! 🍂

@NYCUnlocked · 7 Oct 2026

Stamp ID
STAMP-2026-1007-R5AFATIY
Content hash
dda67971b916297e7b8b208d9b6356a98ab549cf844fd42ca8b698ee0e82ab2b
Day recorded
2026-10-08
Articles recorded that day
16
Attestation UID
0x3fd72ca76c79be099aa7f432c6fb16edc08982e9c7ef6528aa816dccff3b4ac8
View on EAS
Transaction
0x3379a1fcacf0777d45b279ac455541dcaee6ec6fdf7c604fb5a904496de0a459
View on Basescan
Stamped
8 Oct 2026

Recorded on Base using canonicalization v2 and record format v1.

How this article reaches the blockchain

It was combined with the other 15 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
0x775d87ad32d8f76c85e3a68a4bdc309264b9b8a97607390a3c0d0ff7f514302a

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
    0x176580ecaa1ca9f2c1ee9cd891c104249a0571126b4a665c26ebce2c48308565
    0xa9630737eb85c0d73e33c01932d9db00d357a21a963e6ddd7d4399a0dee7827f
  2. Step 2, combined with the value before it
    0x83595c5ddc7843d6d34f81868d23165b1a38153ee3ee8b6a273668a3a668a39d
    0x5cb2d673167ef145af0ede685e176693b233ed2ce3c18dbf26bd7b31bec42a63
  3. Step 3, combined with the value after it
    0x4537175538c44e573b2d90a61b0f598825979e92817c405e566f6a36f8acfebb
    0x4a7e55906677934f282aad9bf8d6658b1cfac6ca362c39ff6e7dc5733f6b6787
  4. Step 4, combined with the value before it
    0x21d60ef530a8e34d26e46969e912c3ac24439afd41c03e19b1f0a425ae50a823
    0x4367ff8d14658640bf775bef7c1b160f231f55acfd93a7ecdc15680b2cb39e66

    This is the value for the whole day.

Value these steps arrive at
0x4367ff8d14658640bf775bef7c1b160f231f55acfd93a7ecdc15680b2cb39e66

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
0x4367ff8d14658640bf775bef7c1b160f231f55acfd93a7ecdc15680b2cb39e66
Read from Base
0x4367ff8d14658640bf775bef7c1b160f231f55acfd93a7ecdc15680b2cb39e66
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":"NYCUnlocked","position":1,"role":"solo","weight":1.0000}],"body":{"content":[{"content":[{"text":"On October 24–25, Governors Island transforms into a giant pumpkin patch with thous…

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-2026-1007-R5AFATIY/canonical" | shasum -a 256

    Should print dda67971b916297e7b8b208d9b6356a98ab549cf844fd42ca8b698ee0e82ab2b

  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-2026-1007-R5AFATIY CONTENT=dda67971b916297e7b8b208d9b6356a98ab549cf844fd42ca8b698ee0e82ab2b DIGEST=$(printf '%s' "$STAMP" | shasum -a 256 | cut -d' ' -f1) printf '00%s%s' "$DIGEST" "$CONTENT" | xxd -r -p | shasum -a 256

    Should print 775d87ad32d8f76c85e3a68a4bdc309264b9b8a97607390a3c0d0ff7f514302a

  3. 3. Combine step 1

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

    printf '01%s%s' "176580ecaa1ca9f2c1ee9cd891c104249a0571126b4a665c26ebce2c48308565" "775d87ad32d8f76c85e3a68a4bdc309264b9b8a97607390a3c0d0ff7f514302a" | xxd -r -p | shasum -a 256

    Should print a9630737eb85c0d73e33c01932d9db00d357a21a963e6ddd7d4399a0dee7827f

  4. 4. Combine step 2

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

    printf '01%s%s' "83595c5ddc7843d6d34f81868d23165b1a38153ee3ee8b6a273668a3a668a39d" "a9630737eb85c0d73e33c01932d9db00d357a21a963e6ddd7d4399a0dee7827f" | xxd -r -p | shasum -a 256

    Should print 5cb2d673167ef145af0ede685e176693b233ed2ce3c18dbf26bd7b31bec42a63

  5. 5. Combine step 3

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

    printf '01%s%s' "5cb2d673167ef145af0ede685e176693b233ed2ce3c18dbf26bd7b31bec42a63" "4537175538c44e573b2d90a61b0f598825979e92817c405e566f6a36f8acfebb" | xxd -r -p | shasum -a 256

    Should print 4a7e55906677934f282aad9bf8d6658b1cfac6ca362c39ff6e7dc5733f6b6787

  6. 6. Combine step 4

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

    printf '01%s%s' "21d60ef530a8e34d26e46969e912c3ac24439afd41c03e19b1f0a425ae50a823" "4a7e55906677934f282aad9bf8d6658b1cfac6ca362c39ff6e7dc5733f6b6787" | xxd -r -p | shasum -a 256

    Should print 4367ff8d14658640bf775bef7c1b160f231f55acfd93a7ecdc15680b2cb39e66

  7. 7. 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/0x3fd72ca76c79be099aa7f432c6fb16edc08982e9c7ef6528aa816dccff3b4ac8

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

Read the specification