Osvaldir Araújo Euzébio (born 15 May 1987), simply known as Osvaldir, is a Brazilian footballer who plays for Villa Nova as a right back. Club career Born in Ipatinga, Minas Gerais, Osvaldir made his
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 0x9f8c7c048e81aa1b71b0b0bf0c97e6023aae825bd6e890f2f4f6b8f75174e997. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/568453b6-e19d-43b0-987b-b6141ac3b50a.json and https://artists.proofprofile.net/proofs/artist/568453b6-e19d-43b0-987b-b6141ac3b50a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).