The Blueprint is the sixth studio album by American rapper Jay-Z, released on September 11, 2001, through Roc-A-Fella Records and Def Jam Recordings. Its release was set a week earlier than initially
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 0xfd870ba986157e9a6c904a104af075077e6dfe04625a32c3fcf96e080ee0ca5b. 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/99f995e7-0112-4869-be75-04cedc121d26.json and https://artists.proofprofile.net/proofs/artist/99f995e7-0112-4869-be75-04cedc121d26.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).