Topsy may refer to: Arts and entertainment Topsy, a character in the novel Uncle Tom's Cabin Topsy, a character in the 2018 film Mary Poppins Returns Topsy and Eva, a 1928 film based on Uncle Tom
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 0xdeba9f82ee1369974bb7b313814a2d126d8067aaa43fac8ea462192b86c2a546. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f583af48-8884-4d8b-94b4-64f8af66665e.json and https://artists.proofprofile.net/proofs/artist/f583af48-8884-4d8b-94b4-64f8af66665e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).