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 0x3c0bfb87cb917f88bab5a21da50627596c590e70869e1a1ce4dc9288e4d2d536. 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/4d0025c7-4e36-4cc9-867f-913992ae6ac3.json and https://artists.proofprofile.net/proofs/artist/4d0025c7-4e36-4cc9-867f-913992ae6ac3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vertigo (Alfred Hitchcock - Original Soundtrack)
La donna che visse due volte (By Alfred Hitchcock)
La donna che visse due volte (Original Sountrack from Alfred Hitchcock's "La donna che visse due volte")
Vertigo (Original Soundtrack from "Vertigo")