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 0x88b7a42c6f2c1b771e337587981d6b5d89e4de890ec2f73a52eb4d9bbc9d7cbf. Chain 2 (Bitcoin): anchored in block 954048 (2026-06-17T05:00:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/421e116f-26ef-4a84-8ad2-40cd688db4a9.json and https://artists.proofprofile.net/proofs/artist/421e116f-26ef-4a84-8ad2-40cd688db4a9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Enrique Granados: Goyescas (Complete Piano Music Inspired by Goya)
Sgambati: The Complete Piano Works, Vol. 6
Sgambati: The Complete Piano Works, Vol. 5
Sgambati: The Complete Piano Works, Vol. 4
Sgambati: The Complete Piano Works, Vol. 3
Sgambati: The Complete Piano Works, Vol. 2
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c584487d9cc1ea1ee64ed7e19c003640ded111a82743e7e63cb7fd8e3ec6049. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU241113430.
Melodies poetiques, Op. 36: IX. En valsant
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eecae0a08548c4afac798850b814ae4589b16f6bee03890d41075476da92be4. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU241113448.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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
Sgambati: Piano Concerto; Cola di Rienzo; Berceuse-Reverie
Sgambati: Piano Quintet No. 2; String Quartet, Op. 17
Sgambati: Piano Quintet No. 1; Serenata Napoletana
Carter, Copland, Ives: American Piano Music
Sgambati: Piano Concerto, Op. 15 & Orchestral Works
Carl Czerny : The Art of Finger Dexterity, Op. 740
Light Breaking Off or Detaching of Chords. Molto allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f237af238ca096fb245fdddd42323ac21dd0047e8e2c1ca09871d219bfd3e86. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITK650700230.
Sgambati: The Complete Piano Works, Vol. 7
The Neapolitan Salon - From the Revolution to the Restoration