Fiendens musik ("The music of the enemy") was a rock band founded in Lund in 1977 by Mats Zetterberg and Mats Bäcker. They began as a coverband and rapidly progressed when they began writing their ow
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 0x77f39415feda5c1a97aa924a34684e4a257a94db6f6068b052ebee37a5508bf6. Chain 2 (Bitcoin): anchored in block 953875 (2026-06-16T02:12:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0767df07-8ab4-42bb-938c-b936c67bdb59.json and https://artists.proofprofile.net/proofs/artist/0767df07-8ab4-42bb-938c-b936c67bdb59.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).