Kathleen Collins (March 18, 1942 – September 18, 1988) (also known as Kathleen Conwell, Kathleen Conwell Collins or Kathleen Collins Prettyman) was an African American polymath from Jersey City, New J
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 0x5ee69ba1d5d4a1fbbdd4cca7537ef314199915844cc0d61f164599a323b96869. 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/e16b47bc-44ef-4576-a29d-2072527aeb59.json and https://artists.proofprofile.net/proofs/artist/e16b47bc-44ef-4576-a29d-2072527aeb59.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).