Elefant (German for "elephant") was a heavy tank destroyer (self-propelled anti-tank gun) used by German Panzerjäger (anti-tank) units during World War II. Ninety-one units were built in 1943 under th
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 0xf0213f8b887062d0de3a50c688cc6af17f593daea6b4951d32e4d049e63d67f1. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b27c2f3-9f10-471b-ad3e-355139502bbb.json and https://artists.proofprofile.net/proofs/artist/4b27c2f3-9f10-471b-ad3e-355139502bbb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).