The Fireflies were an American doo-wop group from Long Island, New York, from the late 1950s to early 1960s. They were one of the first groups in which all band members both sang and played instrument
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 0xd64097a4d64e24e31fe0da034d5716e3e7ef3423f99d90ab3c263f4fab742b27. 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/599aab87-fd67-48fc-96d9-db7085f8192c.json and https://artists.proofprofile.net/proofs/artist/599aab87-fd67-48fc-96d9-db7085f8192c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).