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 0xf17d6f030068f0f15f87482be4febaa3d745f4d36bcbcae5f1509cb3ce42e98b. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6a79d93-7aa7-4cd1-af02-05e92a8a96da.json and https://artists.proofprofile.net/proofs/artist/c6a79d93-7aa7-4cd1-af02-05e92a8a96da.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La vocation (feat. Jean Bouchéty et son orchestre) [Mono Version]
Jean Racine: Les plaideurs (Mono version)