Paper Trail is the sixth studio album by American rapper T.I., released September 30, 2008, on Grand Hustle Records and Atlantic Records. He began to write songs for the album as he awaited trial for
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ac5204242e7c6e5d82a22031ee452de6ac6150e29d77e33d390aee71dcfcc6. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84ad48c8-d258-495b-9c0f-a1b3fa1a2ca2.json and https://artists.proofprofile.net/proofs/artist/84ad48c8-d258-495b-9c0f-a1b3fa1a2ca2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).