Events Below, the events of World War II have the "WWII" prefix. January January 1 WWII: The Soviet Union announces that 22 German divisions have been encircled at Stalingrad, with 175,000 killed
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 0xcadbe4fa0d6f718278142799799d8fa1cf546b27d24e0047a1cbafad6cf7c161. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98b1332a-ec31-4cd6-a6a7-faaf2dca96c4.json and https://artists.proofprofile.net/proofs/artist/98b1332a-ec31-4cd6-a6a7-faaf2dca96c4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).