PT Solo Manufaktur Kreasi, trading as Esemka, is an Indonesian automotive company based in Solo, Indonesia. The "Esemka" brand was named as the abbreviation of vocational high school (Indonesian: SMK/
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 0xcc71cbbb32b70ec40df130bbf8a8bec0b89379b798f997865df2086be63ba1ac. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a6fa0f5-1c26-43bc-ba9e-669b3a9213a3.json and https://artists.proofprofile.net/proofs/artist/7a6fa0f5-1c26-43bc-ba9e-669b3a9213a3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).