Axa S.A. is a French multinational insurance corporation headquartered in the 8th arrondissement of Paris. It also provides investment management and other financial services via its subsidiaries. As
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 0xd3a4fb4a2a5aa0142b2bb7e410df47b830527e76ca7583116cc6be145f803661. 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/b21ee36e-30e6-475f-976c-d35f96236e42.json and https://artists.proofprofile.net/proofs/artist/b21ee36e-30e6-475f-976c-d35f96236e42.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).