Bayer 04 Leverkusen, officially known as Bayer 04 Leverkusen Fußball GmbH () and commonly known as Bayer Leverkusen or simply Leverkusen, is a German professional football club based in Leverkusen, No
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 0xb1654753c96718e3e1646f1cd12214622f60f517e2c976c3030d10ce53b74db0. Chain 2 (Bitcoin): anchored in block 954032 (2026-06-17T01:59:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39efae6b-da3c-4a3c-a719-8461afc6cc32.json and https://artists.proofprofile.net/proofs/artist/39efae6b-da3c-4a3c-a719-8461afc6cc32.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).