thumb|Friedrich Dotzauer Justus Johann Friedrich Dotzauer (20 January 1783 – 6 March 1860) was a German cellist and composer. Life Early life and career Dotzauer was born in 1783 in , near Hildburgh
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 0xd2e79df2a94c6c7ff16f69bd92f0b6fc54deb51d748c741afa3e27540f200341. 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/126aebdd-c85a-4355-afe9-ee98184a63b3.json and https://artists.proofprofile.net/proofs/artist/126aebdd-c85a-4355-afe9-ee98184a63b3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).