1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xd2ba5cb8003a359a16ee9b3e41761e7aead8090c25db7d11e860cc7117e4f3d2. Chain 2 (Bitcoin): anchored in block 953972 (2026-06-16T16:31:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29948c13-b6d4-48bb-9356-2d679f13fbed.json and https://artists.proofprofile.net/proofs/artist/29948c13-b6d4-48bb-9356-2d679f13fbed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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