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

Block 18616

Hash
000000c9fa0b0cc920ba55475cdb69f75cce4e4253b58ecf873c9168d4b69129
Confirmations
22149
Time
2026-10-09 14:00:03 UTC
Median time
2026-10-09 13:51:51 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
8069a2f0680bbf1ec27d025dfa4e1d5ad47572e2f13b44e9dc36a8308f1c51aa
Previous block
0000008949c1a2be494a44dd8d45872d819e88a820472517538c49884c17b438
Next block
000000a7c671bcd1ee9db3b650a7e3470c2c803ddea8511cb5658b2ec1aefbb7

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 18616 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
dc629108ffcadfec4fc52c4e2315429b… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
8069a2f0680b…a8308f1c51aa coinbase1250