Martin Tungevåg (born July 9, 1993), known professionally as Martin Tungevaag or simply Tungevaag, is a Norwegian DJ and music producer who placed at number #89 on the DJ Mag top 100 DJs list. He has
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37dd5712f4cab1e402de40ca7816c6d713855191f98c9b75b6722c2f65e71af1. Chain 2 (Bitcoin): anchored in block 953996 (2026-06-16T20:04:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3046a259-9676-4f7b-b881-0c7734e0034b.json and https://artists.proofprofile.net/proofs/artist/3046a259-9676-4f7b-b881-0c7734e0034b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).