The Kölner Haie (English: Cologne Sharks) are an ice hockey club based in Cologne, Germany, that plays in the professional Deutsche Eishockey Liga (DEL). The team was one of the founding members of th
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 0xd72ee78f2a911650d15f3ee3b11644a3eef56ea615c2dcff169252a08102ce63. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa481d6a-e38b-48be-9d94-d2cc4fbcd79d.json and https://artists.proofprofile.net/proofs/artist/fa481d6a-e38b-48be-9d94-d2cc4fbcd79d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).