thumb|180px|August Stradal August Stradal (17 May 1860 – 13 March 1930) was a Czech virtuoso pianist, arranger, composer, author and music teacher. Career Stradal was born on 17 May 1860 in Teplice,
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 0x36cdf248e4375eaec49a554b7fe2faaacec9b3883761d857cb5c634f3da91766. 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/484d2a0c-b309-45e2-a61b-9004e8908b4a.json and https://artists.proofprofile.net/proofs/artist/484d2a0c-b309-45e2-a61b-9004e8908b4a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).