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 0xaa65c758b410b7c62374f41c64f1110498e0150e492842e78972a4c2173cabbe. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61115068-9d73-4c03-b11c-d70f8c348329.json and https://artists.proofprofile.net/proofs/artist/61115068-9d73-4c03-b11c-d70f8c348329.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x8e4ea147e109ba1a96f4c78bf83636d2c27132e98257fa4d05ebf1d27e77c237. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/MXF580702574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36837529eade0129e669740d64906cb28a727e1daa34960f261ce01c018c9d3. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/MXF580702582.
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
Vals Poético y Otras Obras de Felipe Villanueva
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9487d780992abcb4423c8854365392fb734d46f13f108a2947778b1cb766a7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/MXF581503507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10cf905c4493c0bbd16069a488d0516f765f9b3ada46e5b742e9731733f0cc7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/MXF581503508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2e57c8033b08675626ca0ccebf9b7e22be5b3332ab702e7460218b86ef36c2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/MXF581503515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06037978e34dcf65752815ee466a267df1cdd340b40153d636e54245b5dd67d8. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/MXF581503509.
3 Piezas for Piano: No. 3. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54306718622fe80b9c6102a13672a2311140cd013a1c8491524b63a4b18aa4a. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/MXF581503516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb913b404cfbfce2212bcc024bc2a81247e3907fbeb4ae24a27fd45fa1673ed9c. 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/USHM22108173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f30cea0876a69e1050352076543a10aebbd835f9c664acd68c85355ff464958. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM22108181.
Mahle, E.: 8 Duos Modales / Nobre, M.: Partita Latina / Foss, L.: Capriccio / Mignone, F.: Modinha / Toussaint, E.: Pour Les Enfants
Musica De Las Americas Vol.V: Obra para piano de Rodolfo Halffter
Las Más Bellas Páginas de la Época del Ragtime
Passacaglia in G Minor (After G.F. Handel's Keyboard Suite No. 7 in G Minor, HWV 432: VI. Passacaille)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb278e5e2104976f68108babf16310aa89fdb9e0a77c3bd966fd7f5b4f851b62e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/MXF580501695.
14 Songs, Op. 34: No. 14, Vocalise (Arr. E. Quintana for cello)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd628a7ed4f9bea6949dae2a5b91c4254e1dce6f4650fd11c65bad5b46b2ec2. 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/MXF580501696.
7 Canciones populares españolas (Excerpts Arr. E. Quintana for Cello & Piano): No. 1, El pano moruno
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3725987f01d08b87dc05a427070ac91b109636c09534c8c3d0813356c7919f2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/MXF580501698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a8d51ad7542107078f9f92d2b504bc9592f1c750e54a1c2b66186a08963d07. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/MXF580501701.
Zyman, S.: Suite for 2 Cellos / Calderon, C.: La Revuelta Circular / Marco, T.: Partita Piatti
Mozart, W.A.: Ave Verum Corpus / Exsultate Jubilate / Laudate Dominum / Church Sonata No. 15 / Fantasy in F Minor, K. 608 / Ah, Lo Previdi