"The Cartridge Family" is the fifth episode of the ninth season of the American animated television series The Simpsons. It originally aired on Fox in the United States on November 2, 1997. It was wri
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 0xb6684d4ba963045f6ac5d3e871a91abcb7b7589d4552463ea2d02106dee4409a. Chain 2 (Bitcoin): anchored in block 954055 (2026-06-17T05:51:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/439f2cc7-cfee-41c2-a785-d7d32e5385df.json and https://artists.proofprofile.net/proofs/artist/439f2cc7-cfee-41c2-a785-d7d32e5385df.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).