Reefer Madness is an American public service announcement and exploitation film about drug use and abuse. It was originally titled Tell Your Children, and it has been known by the titles The Burning Q
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 0x7696604156d6ba0f422176d36cf3a9ea84eb3fcbbadab237d73317d5f7d2de77. 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/8c0a7fb1-b261-4eea-9ae7-caa17d36e18e.json and https://artists.proofprofile.net/proofs/artist/8c0a7fb1-b261-4eea-9ae7-caa17d36e18e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).