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

Block 19981

Hash
00000036b69980886e8dc018dba6f710b8bf7baedb13694963405744c45f7c28
Confirmations
20833
Time
2026-10-11 04:08:37 UTC
Median time
2026-10-11 04:00:04 UTC
Transactions
3
Size
3,289
Weight
12,442
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
e3e5af07d0b82e366cfe7a53f291a6f68b8cc0ef362f24c5726f1b458474e339
Previous block
0000006bd524796b4facb197c3cfe004ae8174428540bddbd1e9d15bcc0e7a3d
Next block
0000002e1d8212dcaa2cbfb8e85a480224bb863b57193991bc63a490d3d7b2d2

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 19981 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
68cefc139622b3c206cb11e50d2400ef… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
5b89e8baceab…be99eb4ca6d8 coinbase1250.00000737
7f12e4377a82…cb6dc3391b64 pays to P2MR220.019921060.00000427
dca2878f36bf…d1fb7a4d3cd8 pays to P2MR1210.99987580.0000031