Hellmut Hattler (born 12 April 1952 in Ulm, West Germany) is a German jazz and rock bassist and composer. Hattler took much of his early influences from Jimi Hendrix. As a child, he received violin
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5403214bcf22a13f7941c902a1941f2acf6bb1e94fc42adb284e54b0ca2f1fad. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5558f20e-e63e-4985-84e2-ace3fd631525.json and https://artists.proofprofile.net/proofs/artist/5558f20e-e63e-4985-84e2-ace3fd631525.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).