The Negro Problem is a collection of seven essays by prominent Black American writers, such as W. E. B. Du Bois and Paul Laurence Dunbar, edited by Booker T. Washington, and published in 1903. It cove
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 0xda65a65e445cdd754bca9f64acc0c5444b42fbe3b1290f9b0291bca3a0ddfff3. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2427aaa6-fe92-473e-af4b-a3466c58debd.json and https://artists.proofprofile.net/proofs/artist/2427aaa6-fe92-473e-af4b-a3466c58debd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).