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

Block 18717

Hash
0000006531425da25dc7d8d0d64c58efc2334e221071c517bf99772d084828cf
Confirmations
23262
Time
2026-10-09 16:46:23 UTC
Median time
2026-10-09 16:38:05 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
f3a3eeb0849bc3c239c62e80ecd750a13a0a38b32d94b672db5ae0619b1bdca0
Previous block
00000015841e3693f90e51ad7b16ef4507b7400a551cc2d90646242c8fff4026
Next block
000000b355b1c977ffa61b07626c2ebc477886b512d9c2be16ffb90e898c4194

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 18717 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
57bbfc21a9c5f9e31a2ec239a1b91b16… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
f3a3eeb0849b…e0619b1bdca0 coinbase1250