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

Block 18859

Hash
0000001b626657bcfbb8dd617d09a21797a8b1e201b6edf32638e4aec7526966
Confirmations
23420
Time
2026-10-09 20:41:23 UTC
Median time
2026-10-09 20:33:00 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
246d584cc82beb16fb2d2b17d70b5646e7746031af729920dae9d2baddc033e4
Previous block
000000b89b3298f15d4a3160fa7cf8069396ea28a8f1077de4804aa5e37b14c9
Next block
0000004f419cedbacd8ba3cdb4376158e652be6567c0d2dd1129a801960d635b

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 18859 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
8c7ad83b7a050319e1a0f096fab46b7b… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
246d584cc82b…d2baddc033e4 coinbase1250