thumb | right | A Stemme-manafactured glider Stemme GmbH is a German glider manufacturer. Aircraft production is complemented by service, maintenance and repair of their sports and personal aircraft.
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 0x7ed4327cbd4735f78528469e28e532fb6a6d93afe718a20573714717f6e9cbb3. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc7a0535-e5fe-4813-8421-f0ba60df652a.json and https://artists.proofprofile.net/proofs/artist/dc7a0535-e5fe-4813-8421-f0ba60df652a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).