thumb|right|King Hormizd IV (579 – 590) __NOTOC__ Year 579 (DLXXIX) was a common year starting on Sunday of the Julian calendar. The denomination 579 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80a1bcf09f7db643b16a47056429dcd0a4ecb187d402d042773956a679aca73. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4882d1df-ebc9-4a65-8aee-addc0422ef69.json and https://artists.proofprofile.net/proofs/artist/4882d1df-ebc9-4a65-8aee-addc0422ef69.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).