New Masses (1926–1948) was an American Marxist magazine closely associated with the Communist Party USA (CPUSA). It was the successor to both The Masses (1911–1917) and The Liberator (1918–1924). New
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 0xce6b48837632f9526eda5725065c206ddc63d77e78f755c6bb14e2ca71872719. 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/11f6f420-7784-4563-a5e4-e684f50dfb8c.json and https://artists.proofprofile.net/proofs/artist/11f6f420-7784-4563-a5e4-e684f50dfb8c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).