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 0x0fe894245d5f73058f605163b29451855a71202948abcb06c516028d42677684. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/420df8c1-a3ba-4cf4-882d-746de3f8909f.json and https://artists.proofprofile.net/proofs/artist/420df8c1-a3ba-4cf4-882d-746de3f8909f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Girls Gotta Dance! - Rhythms To Excite the Muscles, Symmetry To Stimulate the Brain, Melodies To Delight the Heart
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc40e9ebfae71f2c089f62969d6fc5e910c438a885af97e15f5d80b59775237. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USASX0862422.
Paganini Played On Paganini's Violin, Vol. 1
Colasanti: Il canto di Atropo - La Rosa que no canto - Chaos - To Muddy Death
Wagner: Wesendonck-Lieder, Siegfried Idyll, Träume; Sciarrino: Languire a Palermo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377ae70efdd48a3e46feb281805053a9c219862e298ea11f9f2a83a76d2458d9. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLY332101785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c24f0b44a778efad67d6a7f7cbdead116fd6c5e3b2a0bcb400afc7f8a27e8d. 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/NLY332101786.
Viotti: Violin Concerto No.22; Cherubini: Symphony in D
Rossini: Péchés de vieillesse — Chamber Music & Rarities
Sibelius, J.: Early Chamber Music, Vol. 1 - Violin Sonata / String Trios / Piano Quartet
String Trio in G Minor, JS 210: I. Lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c7ad6fb67a157ad39b3d471bcd5e744db673a28237f3bd071dcd1d2922fd00. 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/FINDE9400130.
Caprice No. 13 in B-Flat Major: "Devil's Laughter". Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca006b1acf0be48f2d779f4bf7b9ecc9a5111cc43e8bc8de1a562aea3fb23df. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBLWD0500513.
Paganini Played On Paganini's Violin, Vol. 3
Paganini Played On Paganini's Violin, Vol. 2
Vivaldi, A.: 4 Seasons (The) / La Tempesta Di Mare / Il Piacere (Storm at Sea, Pleasure)
The 4 Seasons: Violin Concerto in G Minor, Op. 8, No. 2, RV 315, "L'estate" (Summer): I. Allegro non moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4c2bc7ba45fa9132d1aa71d295d1df534f561ea7a8c10e7ea0f588c5393e9a. 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/USASX0828004.
The 4 Seasons: Violin Concerto in G Minor, Op. 8, No. 2, RV 315, "L'estate" (Summer): II. Adagio - Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf6ba1b1cc8798b02710b2b727c828664f8656cedb6f013ac7642d310e4b762. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USASX0828005.
The 4 Seasons: Violin Concerto in G Minor, Op. 8, No. 2, RV 315, "L'estate" (Summer): III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4184e3c81e4287f8810e34ffb22165bbc947dda4baa93eeaddc85987a3fde68. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USASX0828006.
The 4 Seasons: Violin Concerto in F Minor, Op. 8, No. 4, RV 297, "L'inverno" (Winter): I. Allegro non molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90df01d53f463b2ed718707728e944b8fe0d7636e59e6062fe06de2ea96ed83. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USASX0828010.
Violin Concerto in E-Flat Major, Op. 8, No. 5, RV 253, "La tempesta di mare": I. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0663d67a48ee77e61bfe75d06d6e06d8c617166d595043610719bf9769654de. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USASX0828013.
Paganini: I Palpiti / Napoleon / Maestoso Suonata Sentimentale / Le Streghe
Mozart, W.A.: Rondos - K. 382, 386 / Concerto for 3 Pianos, K. 242 / Concerto for 2 Pianos, K. 365