Grach may refer to: MP-443 Grach, a Russian pistol. Sukhoi Su-25, a turbojet powered armored ground support aircraft. Foel Grach, a mountain in the Welsh Carneddau. Rafayel Grach, a former Soviet sp
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 0x66a68f56b7ebda12cd9eb22c32471bcd3b1a4d63b744c600489df79ea973a51b. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c54a88e-4ac7-41b7-967e-48a601a608c2.json and https://artists.proofprofile.net/proofs/artist/1c54a88e-4ac7-41b7-967e-48a601a608c2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rustboro City from Pokémon (Jazzy Lo-fi)
Mingle Game Song “Round and Round” (lofi) [from Squid Game 2]
Mingle Game Song “Round and Round” from Squid Game 2 (Acoustic Lo-fi)
Mingle Game Song "Round and Round" from Squid Game 2 (Acoustic Lo-fi)
Neon Tapestry (Dreamy Ambient Retro Synth)
Time Serenity (Dreamy Sleepy Relaxing Ambient)
Harry & Hermione (from Harry Potter and the Half-Blood Prince) [lo-fi]
Hedwig's Theme (from Harry Potter) [lo-fi]
Jump Rope Song from Squid Game 3 (Lofi Hip-Hop)
Jump Rope Song (lo-fi) [from Squid Game 3]
Golden from KPop Demon Hunters (Acoustic Lofi Hip-Hop)