Slax is a LiveCD Linux distribution developed by Tomáš Matějíček and based on upstream customizable Linux distributions. Packages can be added by apt package manager or can be prepared as modules. The
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f1ab89ef04e99b30b77e1270860770748c3690cdea0d1db6e201cd49bedbb1. Chain 2 (Bitcoin): anchored in block 954050 (2026-06-17T05:14:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42cfdd62-c6b0-46a0-83f2-34808909003f.json and https://artists.proofprofile.net/proofs/artist/42cfdd62-c6b0-46a0-83f2-34808909003f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).