PaperClip is a word processor for the Commodore 64, 128 (native mode), and Atari 8-bit computers published by Batteries Included in 1985. In the UK it was published by Ariolasoft. Both the Atari and
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 0x6bf80409c00597bdd9d42d65e7c8d49d9962dc9feffd400faea890ec2847fa59. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf51196c-aa33-44da-9e12-4ca6c07af0ee.json and https://artists.proofprofile.net/proofs/artist/cf51196c-aa33-44da-9e12-4ca6c07af0ee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).