upright=1.35|thumb|King Liuva II (583–603) __NOTOC__ Year 601 (DCI) was a common year starting on Sunday of the Julian calendar. The denomination 601 for this year has been used since the early mediev
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 0xad8cef4e2598e3c7e50b8dbfbf92874288d4ee19fedda1f8d8eda42ee1e0aff7. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b85c0e3f-33ab-4e9e-8c7f-cd7be9f1a3b9.json and https://artists.proofprofile.net/proofs/artist/b85c0e3f-33ab-4e9e-8c7f-cd7be9f1a3b9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).