right|thumb|BIZMAC The RCA BIZMAC was a vacuum-tube computer manufactured by RCA from 1956 to 1962. Although RCA was noted for their pioneering work in transistors, the company decided to build a vac
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 0x6d39df5d5f7cb2eaa3afde59c4a4704dfea346818a7f159ca014888c62a2eb02. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7c00db1-c782-41e8-a472-43cc62afcdb3.json and https://artists.proofprofile.net/proofs/artist/a7c00db1-c782-41e8-a472-43cc62afcdb3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).