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 0xb6d18be6a106ee4385c9981da7a7918487dcfdad0253f5d32497be0b271c87b7. 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/a3452f10-bb11-4e7f-b8bb-ffdf97c6250c.json and https://artists.proofprofile.net/proofs/artist/a3452f10-bb11-4e7f-b8bb-ffdf97c6250c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ahmed Wahbi, Vol. 5 (Collection du Patrimoine Musical)
Ahmed Wahbi, Vol. 1 (Collection du Patrimoine Musical)
Ahmed Wahbi, Vol. 6 (Collection du Patrimoine Musical)
Ahmed Wahbi, Vol. 3 (Collection du Patrimoine Musical)
Ahmed Wahbi, Vol. 7 (Collection du Patrimoine Musical)
Ahmed Wahbi, Vol. 2 (Collection du Patrimoine Musical)
Ahmed Wahbi, Vol. 4 (Collection du Patrimoine Musical)
Ahmed Wahbi, Vol. 8 (Collection du Patrimoine Musical)