TeX (), stylized as , is a typesetting program that was designed and written by computer scientist and Stanford University professor Donald Knuth and first released in 1978. The term now refers to 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 0x7bed56cacdbea8433e40f38b69676d23ae0046356779d16b2fbf4110e9ca77c9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8169ef8-d6af-425d-afbd-2b5794ba30dd.json and https://artists.proofprofile.net/proofs/artist/a8169ef8-d6af-425d-afbd-2b5794ba30dd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).