Dabasu Durovys is a Latvian pop rock band, formed at the beginning of 2006 in Daugavpils. Most lyrics of their songs are written in Latgalian. The band's name is Latgalian for "the doors of the sky".
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 0xad1828aeb31453ef0ba5a54c91f27271583eee77deb29e2c807c026d2db06910. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fac9a836-c08b-437e-8e2b-308442e6c19a.json and https://artists.proofprofile.net/proofs/artist/fac9a836-c08b-437e-8e2b-308442e6c19a.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.