Bruno Cunha (born ) is a Portuguese male volleyball player. He is part of the Portugal men's national volleyball team. On club level he plays for VC Viana. References External links profile at FIVB
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 0xf8f9c3c0836f49ba13dcdca40f1c85a0db14d85abbdcbd2573295ad2f63702b3. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f479393-9276-4fe0-81d6-2abf48b16b1e.json and https://artists.proofprofile.net/proofs/artist/8f479393-9276-4fe0-81d6-2abf48b16b1e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).