Erik Weiss (born 12 November 1973), better known by his stage name Liondub, is an American DJ, producer, and record label owner who specializes in jungle, drum and bass, reggae, dancehall, hip hop and
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 0x65e93945bcb66320a25cedaa6835f61cc783a6bc8454edb0cb27810b7a7f60d5. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74f5b738-cbc0-418b-8847-c16f623ae3ca.json and https://artists.proofprofile.net/proofs/artist/74f5b738-cbc0-418b-8847-c16f623ae3ca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).