Subrosa Union is an American reggae rock band from Austin, Texas formed in 2000. The band comprises Michael Anaya, Chris Paulos, and Paul Valenzuela. Originally from El Paso, Texas, the trio relocated
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 0x0651b12d38c8b62137b9357352dea0eaebde44bac9a97a4a85da8566cb933ab6. Chain 2 (Bitcoin): anchored in block 954047 (2026-06-17T04:56:08Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/415e45c1-69f7-44c0-85b5-ce492d577cde.json and https://artists.proofprofile.net/proofs/artist/415e45c1-69f7-44c0-85b5-ce492d577cde.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).