Antidoping is a Mexican reggae band formed in the summer of 1992 in Mexico City. They fuse roots reggae, ska and Caribbean rhythms with an urban flavour. Background The band was formed in 1992, by Pe
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 0x24de2d50358675d6cf323785787dad372524661125a34009e6497018c23941e9. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c5260a9-6b8a-4524-ac5d-b51f5506cacf.json and https://artists.proofprofile.net/proofs/artist/9c5260a9-6b8a-4524-ac5d-b51f5506cacf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).