Ark-0
Ark-0 is a test network for trying things out. It may be reset at any time.

Block 18197

Hash
000000e5013032bc4f1ff937a32c23acd1ad496aa375bff26ac7bed8421e63eb
Confirmations
23330
Time
2026-10-09 02:20:24 UTC
Median time
2026-10-09 02:11:47 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
f6c5acb3a1c3c58309b1d0010688767575f5be9698a532fef7c60ca8afa09246
Previous block
0000004538cc57ea045055c08717331b22ec0eda4cd60ada8a8078929f0616ba
Next block
00000021c03f0971e9ce1295d3d24bc1356f8dbd2ad003b0e96c742d5aa30d1b

ML-DSA-44 block signature (M2)

M2 is an experimental rule of this test network. From a height set in its build, a node that enforces M2 accepts a block only if, besides the classical signet signature, the block carries a valid ML-DSA-44 signature by the Ark-0 block key, in its coinbase's witness commitment output. This page shows that signature; it does not check it.

Block 18197 is below the activation height 20000: nodes do not require this signature, and only log the result of checking it when run with -debug=validation. The block producer adds it from height 18000 on, so that nodes can check it before it is required.

Status
In the form M2 requires, followed by the signet solution push (the classical signature)
Signature
cd61744805a37e20a35a63e5c4668aea… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
f6c5acb3a1c3…0ca8afa09246 coinbase1250