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 0x13586bd5238ae593a8fb0352bd4ff7c166573fd8da451773f585972515a1f0e0. 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/57432ea6-e799-4ddf-80ae-f1a157705688.json and https://artists.proofprofile.net/proofs/artist/57432ea6-e799-4ddf-80ae-f1a157705688.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Easy Brazilian Jazz - Bgm for Hotel Spekeasies
Subdued Music for Hidden Chances - Jazz Quartet
Quartet Jazz (Music for Loafing Evening)
Music for Evening Intros - Cultured Piano Bossa Nova Duo
Wondrous Piano Bossa Duo - Ambiance for Slow Times
En cualquier lugar, solo, con Jazz y lluvia