The Main Attraction may refer to: The Main Attraction (film), a 1962 British drama film The Main Attraction (album), a 1976 album by Grant Green, or the title song Main Attraction (album), a 1982
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 0x0962be32213e3f662c2e7ab91f271d760f8be0ce86c9fe3ef49fabf183039379. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1df9ebc-6100-404c-8721-9ebbdf2e91a4.json and https://artists.proofprofile.net/proofs/artist/c1df9ebc-6100-404c-8721-9ebbdf2e91a4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).