thumb|259px|King Clovis I by François-Louis Dejuinne (1835) __NOTOC__ Year 509 (DIX) was a common year starting on Thursday of the Julian calendar. At the time, it was known as the Year of the Consul
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 0x8d778619b337ac0261a73858d095f00dfbe005d6e967b6cb1d764545da443d5b. Chain 2 (Bitcoin): anchored in block 954124 (2026-06-17T18:22:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b9af625-312d-4ed2-8dab-a515cd784bb9.json and https://artists.proofprofile.net/proofs/artist/7b9af625-312d-4ed2-8dab-a515cd784bb9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).