Sosa may refer to: Name Sosa (surname) Alejandro "Alex" Sosa, fictional drug lord from the 1983 film Scarface Chief Keef (born 1995), American rapper Keith Farrelle Cozart, nicknamed Sosa Jerónimo d
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 0x0c017a0f8273bfc447862c9911b45af54b524c28c4763351745a7d4d258d3585. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54578488-156e-4a13-9f1a-d6f70aab7eb1.json and https://artists.proofprofile.net/proofs/artist/54578488-156e-4a13-9f1a-d6f70aab7eb1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).