Rolin is a surname. Notable people with the surname include: Andrew Rolin (born 1987), American former college football player and coach Gustave Rolin-Jaequemyns (1835–1902), Belgian attorney at law,
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 0x33372f1d54114e7129cc8d773469e73f285f9db9e5d944f0603c65a02556dc5d. Chain 2 (Bitcoin): anchored in block 953879 (2026-06-16T02:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a9bb221-c921-4e45-b445-60ef53ecb8ca.json and https://artists.proofprofile.net/proofs/artist/0a9bb221-c921-4e45-b445-60ef53ecb8ca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).