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 0x2044df3436d9e63713a798cde0d742291a4ffe9b74b1016e653c134344f0cc03. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0ef5f87-2038-465f-8244-aa61fe54dee8.json and https://artists.proofprofile.net/proofs/artist/a0ef5f87-2038-465f-8244-aa61fe54dee8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
African Heritage Symphonic Series, Vol. 3
African Heritage Symphonic Series, Vol. 1
African Suite, Op. 35: African Suite: IV. Danse Negre
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 0x3f88934a369061fcd44bd5dcc057126e4eabb2c0dc9ff41c0f7b0a47728d4d41. 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/USA560561916.
Mozart: Le Nozze di Figaro (Overture - La Vendetta, oh, la vendetta - Non piu andrai - Voi che sapete - Dove sono - Aprite, un po'quegli occhi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf259232e70fb50a7a31a30b66e312c3aec26e74cbe741fb0cdf0da61a243a87b. 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/USKO11800369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cce38801a69687e8ec998b67828aff1953958546b9aab194a5aceec50658a5. 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/USKO11800374.
Puccini: Tosca - Finale: Presto su Mario
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab99b369850d6c3979b096cc75498abe01c4ba89ee2f440b00c159e9025440db. 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/USKO11800375.
Ofra Harnoy, Vol. 1: Offenbach, Tchaikovsky & Saint-Saëns
Mendelssohn: Piano Concertos & Variations sérieuses
Brahms: Piano Concerto No. 1 in D Minor, Op. 15; R. Strauss: Burleske in D Minor, Op. 11
Macdowell: 2 Piano Concertos & Solo Works
Mozart: The Great Piano Concertos, Vol. 1
Piano Concerto No. 15 In B-Flat Major, K. 450: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70218465507e7c3c3deaeeb22e608c68a14cda6baf06c577bfb3325964b216c. 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/NLN580571069.
Piano Concerto No. 15 In B-Flat Major, K. 450: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14b4291839c72fc24724678e62693e96403f592ea039fbc0039cbf29cc0ff31. 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/NLN580571071.
Piano Concerto No. 11 In F Major, K. 413: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87398a71a0c675b70847323ae153fcfabcd3a4b183b71b2ae1967def106bb268. 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/NLN580571073.
Piano Concerto No. 23 In A Major, K. 488: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e4f0c2c67d6fa1b27587537e86fef06ea1e879344aa93a70e5a7dcbe937339. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/NLN580571076.
Jongen, J.: Suite for Viola and Orchestra / Francaix, J.: Rhapsodie / Serly, T.: Viola Concerto
Mozart: The Great Piano Concertos, Vol. 2
Mozart: Piano Concertos K. 467, 37 & 503
Piano Concerto No. 21 in C Major, K. 467, "Elvira Madigan": II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef4bdd1569a2b51449e7950c9e99aedcc8d754d549d84355a592a5cebff0597. 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/NLY330604219.
Music from the Fleisher Collection, Vol. 4
Music from the Fleisher Collection, Vol. 3
Paul Freeman Introduces Exotic Concertos
Villa-Lobos, H.: Prole Do Bebe No. 1 / As Tres Marias / Saudades Das Selvas Brasileiras
Prole do bebe No. 1: Negrinha (A boneca de pau)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd22d05c017fd47bba8ad8e4dccc11f7c9f9f22f26cb275586e81304b4f13a4d. 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/US8270910810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b694dc550e4688a0e37d6689e697918f3231fddf52bcd374daaaaa1b4433489. 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/US8270910814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76dbaa981ca49e5b3b4f01d80cee9c82cdbbfb4bfcc2a21d37040b64443edddb. 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/US8270910816.
Saudades das selvas brasileiras: II. Un poco animado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f414d88841564ff6fb2e1f21e2c207903122ddbc3ca334fb3ede2ba9194afb. 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/US8270910819.
Beethoven, L. Van: Piano Concertos Nos. 1 and 3
Franz Liszt: Piano Concertos Nos. 1-3, Concerto Pathétique, Hungarian Rhapsody, Malediction, Rhapsodie Espagnole, Totentanz, Wanderer Fantasy
Piano Concerto No. 2 in G Major, Op. 44: II. Andante non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b45522fd961947be783905fcd7351b2a480474d040cec1d7d61da0218ee627. 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/NLY330606878.
Oboe Concerto No. 2 in F Major, Op. 52: I. Allegro
Krommer: Oboe Concertos Nos. 1 and 2 / Hummel: Introduction, Theme and Variations
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46519bd2b95f8e84b07208c13a35c52f83f2c9c12c53bcec4482ea48c00e8fac. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA560562059.
Introduction, Theme and Variations in F Major, Op. 102
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255109ad026efca53268a7f9221fe9bc714a64d58b227281b84057cc67a4efa5. 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/USA560562062.
Piano Concerto No. 9 in E-Flat Major, K. 271 "Jeunehomme": III. Rondeau. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9187ac61609c5d629580912f3e5badfbf974c6c67414f22d63532d61fe452f3a. 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/NLY331410314.
Piano Concerto No. 17 in G Major, K. 453: III. Allegretto - Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde187b9a5cf4c081e83e1fb31b403553c707526636259ce2842ffa2a3e4f1db7. 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/NLY331410323.