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

Block 18561

Hash
0000005623c9ff13ea537338088aef92121720e87c2c7eb17f11669574d8faa1
Confirmations
21932
Time
2026-10-09 12:30:07 UTC
Median time
2026-10-09 12:22:17 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
7366e735d7ac25d5fa1ea80e9a0fe7c4efeeb850747a5194871258f8b813a39b
Previous block
000000b80572eb457063fa230b62ef89258225020c07d7a465c28a74e4abbff4
Next block
000000c9c7a54bf33faa75d093c2b8dc58c638b28e94dc36e1e99da0542f5ba8

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 18561 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
8acbc10ab2ba86f31459357d941435ae… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
7366e735d7ac…58f8b813a39b coinbase1250