The 38 (Sd.Kfz. 138/2), originally the 38(t), known mostly post-war as , was a German light tank destroyer of the Second World War based on a modified Czechoslovak Panzer 38(t) chassis. German armo
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 0x033f312d1f916fff5bbeba834a10066c74451494bbbee5060741fdf78726ca82. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a8f77f4-3e35-4e1c-aefc-6ba5c889393a.json and https://artists.proofprofile.net/proofs/artist/9a8f77f4-3e35-4e1c-aefc-6ba5c889393a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).