The Fevers are a Brazilian band formed in the city of Rio de Janeiro in 1964. Part of a movement known as Jovem Guarda, they were formerly known as The Fenders when they were formed. The original line
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 0x11c97b14ea392b79c2c248473900af286833d055809e603ec49992d0ae4ee9b2. 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/8769a6c7-8c6f-4982-89b1-2a872bc0330b.json and https://artists.proofprofile.net/proofs/artist/8769a6c7-8c6f-4982-89b1-2a872bc0330b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
No Club da Jovem Guarda em Fortaleza 1997
A Festa Continua 2 Participação Golden Boys Ao Vivo 2020