Gato Fedorento (; "Smelly Cat") is a Portuguese surreal comedy group, known for their subjective and absurd satire centering both on the Portuguese language and the Portuguese social reality. The grou
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797ad50b662d09f47c0c2ffc015b397cd901c11596ef1f03729ee88dc27c770b. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91c19236-2a85-44b1-94e8-42cfe2bbbf75.json and https://artists.proofprofile.net/proofs/artist/91c19236-2a85-44b1-94e8-42cfe2bbbf75.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).