Eric Ernest Unger (December 28, 1926 – March 28, 2018) was a Canadian ice hockey player with the East York Lyndhursts. He won a silver medal at the 1954 World Ice Hockey Championships in Stockholm, S
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 0x1bd2f0121c17f5c31f0b0dcce48094ddb8d2361d062e0a962bd66e4af26787ed. Chain 2 (Bitcoin): anchored in block 954141 (2026-06-17T21:14:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80057120-961b-4804-8b30-72fa2126cba2.json and https://artists.proofprofile.net/proofs/artist/80057120-961b-4804-8b30-72fa2126cba2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).