FBK may refer to: Sport Basketball Federation of Kosovo (Serbian: ) Fanny Blankers-Koen Games, a Dutch athletics competition Färjestads BK, a Swedish ice hockey club FBK Kaunas, a Lithuanian fo
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 0xfe490e09d593cc92304a9c2e938f20bbc4ea4d89bbafc1b08f9eb88779fe3251. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f9fbfb7-e894-4eeb-baf6-cbc7050d8550.json and https://artists.proofprofile.net/proofs/artist/0f9fbfb7-e894-4eeb-baf6-cbc7050d8550.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).