thumb|180px|Eduardo Fabini Eduardo Fabini (Solís de Mataojo, 18 May 1882 – 17 May 1950) was a Uruguayan composer and musician. Fabini, along with Alfonso Broqua, Luis Cluzeau Mortet and Vicente Asco
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 0x66e4e8d411208311330b792ee90a5c6d538e775f2cc9ecf5a20c93f2a348120e. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f544126e-6e52-40da-be9d-96aeee7fe428.json and https://artists.proofprofile.net/proofs/artist/f544126e-6e52-40da-be9d-96aeee7fe428.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).