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 0x837bc781621aaba5461a1e594f3d0c98e3462ed416ea258f2962a2022b659a35. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4afec9e-c474-4b50-b674-54f6003c750f.json and https://artists.proofprofile.net/proofs/artist/a4afec9e-c474-4b50-b674-54f6003c750f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nassima chante Des racines et des Chants
Des racines et des chants (Of Roots and Songs)