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

Block 18743

Hash
000000c0b7d47a49b3667f952782f12f5f9abf9ea9a155fc84c46473170d0dea
Confirmations
23441
Time
2026-10-09 17:29:07 UTC
Median time
2026-10-09 17:20:51 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
b2055fa6fe47361d0ad097d9fbc7de9dcd04f51ee18f5476af4ee5733cdf1604
Previous block
0000005500aacb03c2552f38dcf49bfa958aec8fa3f5a2f4245a87865ad32aa1
Next block
000000ebc4beb991ac18c70a1eb33c3d69642fd868ad4c7aa5d441462448a901

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 18743 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
90693bf24a7bb7e69058e2415d8d1287… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
b2055fa6fe47…e5733cdf1604 coinbase1250