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

Block 18660

Hash
0000005ca390add5f132dbd19c12c3cd0b5dac0d7185c7cba623383c8178b9e4
Confirmations
23461
Time
2026-10-09 15:12:20 UTC
Median time
2026-10-09 15:04:10 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
86682361fab1b212a59d95c60d8eef734c5f76a58d0223d9fc278b0a05ae4451
Previous block
000000f90221354dcb707fb0adc4eb23c394ccb1e502eb324175b1bcb7fae3e9
Next block
0000003752002a447c14985dbb481b80f5371088c7d4ad0bd2fc5c06f456a6c6

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 18660 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
e39f7bd518b785bf123483e9f0ae16e2… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
86682361fab1…8b0a05ae4451 coinbase1250