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

Block 18001

Hash
000000364d5c95554a6b06b61336ea3334f45acb4bc0940ed89265b9fd92b0e9
Confirmations
24164
Time
2026-10-08 20:49:53 UTC
Median time
2026-10-08 20:42:06 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0040172004
Bits
1e00f8ed
Merkle root
2f282541d97cf71523f5b23fdc80fb371483c29eac07af9af6b1ef9e56c60f00
Previous block
000000100bb3026a2303ce46839febbe47c3d50150cec0d137b2324a3f493dfb
Next block
000000076c8f4de85a978128aa7c0bdeb2cea5923461a1671c7fb7a064d1d273

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 18001 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
744cedfafef8d8994ea30e7ce5ae414e… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
2f282541d97c…ef9e56c60f00 coinbase1250