The Dirty Mac was John Lennon's temporary supergroup organized in December 1968 that featured Eric Clapton, Keith Richards, Mitch Mitchell and Lennon under the nom de plume of Winston Leg-Thigh. The D
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 0x14e16be3212713be04d3218d067d7c3854b6f292cfb2e86729dd67f8ad5e8ac7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81a9454b-a511-4154-9ae6-625317770fa1.json and https://artists.proofprofile.net/proofs/artist/81a9454b-a511-4154-9ae6-625317770fa1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).