thumb|Diagram of treble, alto, and bass clefs with identical-sounding musical notes aligned vertically|alt=|440x440px thumb|Middle C represented on (from left to right) treble, alto, tenor, and bass c
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 0x7b277ca587f647eb622b0bc4afac1d5060a0bc74a2ee2eb7fd27aa900a1905fd. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0c7300d-cefb-45e6-bc9c-90c77dc2f83c.json and https://artists.proofprofile.net/proofs/artist/d0c7300d-cefb-45e6-bc9c-90c77dc2f83c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).