Big M is a brand of flavored milk that was founded in Victoria, Australia, in 1977. It was launched by the Hawthorn-based and newly formed Victorian Dairy Industry Authority (VDIA), which replaced the
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd14371cc0d5862eeed33ef5b017028de4c1d6ecf59488ef6147f6d0e7a7b18. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd0e6875-e298-4719-919c-c8dc1227da97.json and https://artists.proofprofile.net/proofs/artist/bd0e6875-e298-4719-919c-c8dc1227da97.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).