Petter Bjørklund Kristiansen (born 14 May 1989 in Fredrikstad) better known by his stage name Katastrofe, is a Norwegian singer and songwriter. Originating from Fredrikstad in Norway, he is signed to
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 0x60388054365130272ff2b9bcbb320389022492066bb6685a29baf957c8ad27e7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e8040d4-a521-4a7e-a3c8-940f0750a687.json and https://artists.proofprofile.net/proofs/artist/9e8040d4-a521-4a7e-a3c8-940f0750a687.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).