Casa or CASA may refer to: Music B.U.G. Mafia prezintă CASA, 2002 album by Romanian hip hop group B.U.G. Mafia Casa (Morelenbaum²/Sakamoto album), 2001 Casa (Natalia y La Forquetina album), 2005,
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e0b1fc7d5f3c66d2baaaebcb31e26bde52aac4f6508a312a5b419c625f7799. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05333751-7d8a-42a6-adce-601ca6bb5a62.json and https://artists.proofprofile.net/proofs/artist/05333751-7d8a-42a6-adce-601ca6bb5a62.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).