One Last Time may refer to: Songs "One Last Time" (Agnes song), 2012 "One Last Time" (Ariana Grande song), 2014 "One Last Time" (Dusty Drake song), 2003 "One Last Time" (Hamilton song), from Hami
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 0x48cbe1d0a7b5a06a8e2ebf0995fa10de148459fe2b832a60516b182464218843. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66a957c5-2618-45e6-9b37-e2decee97b1c.json and https://artists.proofprofile.net/proofs/artist/66a957c5-2618-45e6-9b37-e2decee97b1c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).