1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3268d7fd4fe0ed755fa0c91c701546fe761b95f06142368d3a6ec701479aef. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/129455a2-9871-475a-938b-59e950bb547b.json and https://artists.proofprofile.net/proofs/artist/129455a2-9871-475a-938b-59e950bb547b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
El último adiós: Piano Music in Romantic Spain
6 Valses à la tudesque (Petits riens): No. 1, —
6 Valses à la tudesque (Petits riens): No. 2, —
6 Valses à la tudesque (Petits riens): No. 3, —
6 Valses à la tudesque (Petits riens): No. 4, —
6 Valses à la tudesque (Petits riens): No. 5, —
6 Valses à la tudesque (Petits riens): No. 6, —
Recuerdos de Andalucía (Version for Piano)