Antagony is an American deathcore/metalcore band from the Bay Area of California, United States, formed in 1998, disbanded in 2009, and reformed in 2019. The group are noted for combining their metalc
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 0xdc015e909cbf6fa6783231490c2a32cc75e3cc4bf4b4768a3f39fd259ad5e3b7. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ce6d4d5-bf5a-49d6-8f23-5e0486866886.json and https://artists.proofprofile.net/proofs/artist/7ce6d4d5-bf5a-49d6-8f23-5e0486866886.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).