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 0xa69c84ac2373e031efbef804227ef962c92c7c7da8d488acab9709ca4cd82496. 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/b0d3aba7-ede6-4450-8a18-a1ffb7145b6c.json and https://artists.proofprofile.net/proofs/artist/b0d3aba7-ede6-4450-8a18-a1ffb7145b6c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Digital Masterworks. Popular Pieces for Orchestra
Choral Music - Bortniansky, D. / Schubert, F. / Bruckner, A. / Bruch, M. / Mendelssohn, Felix / Silcher, F. / Rheinberger, J.G.
Adam, A.: Postillon De Lonjumeau (Le) [Opera]
The 100 Most Essential Pieces of Classical Music
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 0x8e8f70e61063ecb99a68e8d5ba171793f8ef87f790fdb4eac9d64a257dc5e594. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEWDL0721802.
Violin Partita No. 3 in E Major, BWV 1006: I. Preludio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6cf2c91c0dc7b19c955dfab502dd4f8b61e58d536421b0fef316cc8206108c. 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/SEAEM0429080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a91258fadb1426b3a8211abd7c89fb21cb52276dfd14a49cebb1acf29010274. 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/SEWDL0721617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572fb5cfc75df524815cc323cb17159ccab76ce7513658741ea1cf8b7510cb79. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEWDL0501814.
Jurmann, W.: Film Music (The Original Motion Picture Scores (Arp)
Trois Gymnopédies: I. Lent et douloureux (Arr. by Wolfgang Sieber)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f202a6cc7c55e5a35f4ba5157d75a26a9dad7c1d2684aec4d37eb6217582de. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:09:07Z), 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/SEWDL0733607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7526e677469de4cbdf57e01f7c0137337aeb4ac34196f4e6fee0975d3f9c4ad. 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/SEWDL0721615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc166a866e617cf8e1278082c13635eea5100f849d2d7bd2536a8251922cb4c30. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEWDL0573708.
Klughardt: Lenore, Op. 27 - Gernsheim: Zu Einem Drama, Op. 82
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8ee16f7d30e8e8353dd39e9aee8e4db1a91631de94502bc85973d32ec7e215. 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/FRZ299502010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e86dc35290d0ee0a57b9070c11e9dda5a6ebd675ded0b5a9c69b5bd2cd2ea04. 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/FRZ299502030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318cafeadd9d4a09bffe562d3f791d5df1da596868a9a9bf677120aef82d7086. 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/FRZ299502050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76757d42a4c7e0f6d0085ddc950af3f70e2e3620447e575c75d938012881397. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FRZ299502060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0160972db9230c63c1d7a48563ced165754d66503298cd00ad812dfc08087796. 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/FRZ299502090.
Vivaldi and Albrechtsberger: Concertos for Guitar and Recorder
Concerto in D Major for Guitar and Strings, RV 93: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af9cd1aaaeb74baee400b0475e7f2648d9fe5f270ad6cc7e6eef40d3dd9c773. 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/SEWDL0713303.
Wolfgang Amadeus Mozart: Very Classics. The Magic Flute
Digitalmasterworks. Famous Overtures (Volumen I)
Symphony Orchestra Baden-Baden / L'histoire De La Musique
La Flauta Mágica - Wolfgang Amadeus Mozart
Goethe And Music, Vol. 1 - Beethoven, L. Van / Mendelssohn, Felix / Gounod, C.-F. / Berlioz, H. / Massenet, J. / Mahler, G. / Spohr, L. / Boito. A
La damnation de Faust, Op. 24, Part II: Ballet des syphes (Dance of the Spirits)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3775d54df99a8bf054852380e9ec83b50fbb4a7a2b77d2a90b5f607565b8f5f3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US2TL0931207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf41c1a45e861768cd9509fbdf67a91f7e66817babcac502f256a204f8121b2. 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/SEWDL0759304.
Le nozze di Figaro (The Marriage of Figaro), K. 492, Act 2: "Voi che sapete"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22432fc75cad4591a28cc19e9b3f84d3dce257aafc83f37e512e12939ffb6889. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:35:41Z), 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/DEB790624830.
Pelléas et Mélisande: Sicilienne, Op. 78
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fe2a4db54cf4859ec19b61f9c318e71e85d9a943399b5e0b4569bfac544df8. 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/SEAEC9424140.
Concerto No. 1 in E-Flat Major for Piano and Orchestra, S. 124: I. Allegro maestoso - Tempo giusto
Orquestra Sinfônica do Estado de São Paulo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41428101d70886e105948388e47554700c8bd2324eca3714714841b05fffe2ca. 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/SEAEP0730110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab2ed6003bdb90a4bb885ff15c68f33116fa751ea1daf55abd84131898ee332. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:01:51Z), 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/DEB790624822.
Requiem Mass in D Minor, K. 626: II. Dies irae
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12239d0f191bdec77948700378f0cda3528dbff90ac8091ee7a322f7a0a454a. 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/DEB790303497.
Le nozze di Figaro (The Marriage of Figaro), K. 492: Overture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e38768930de77526c8d6abc393fe6b0c02fddfb7d96790fb8edd12366c8ad60. 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/DEB790325102.
Sonata No. 12 in F Major for Piano, K. 332: Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665735464ab358eaaf8b80f5c9d1cf83dfd467c206076b03b9c2141d6cd2d293. 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/SEWDL6018060.
Andante in C Major for Flute and Orchestra, K. 315
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281c54ea58964a693f7a075b68f6c889ba8c4177afa0bc781e1e4d8af65f394a. 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/DEB790300961.
Die Zauberflöte, K. 620: "Der Vogelfänger bin ich ja"
Sudwestfunk Symphony Orchestra Baden-Baden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff590b491166dcf3ec597595a7321f8a2b23910da4c0effa3a90a3d1c283ed1. 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/FR3KD1505413.
Die Zauberflöte, K. 620: "Bei Männern, welche Liebe fühlen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d4d4c58b3eaf0649482e355ec3fae8fe15c09098909d2227d087ce9f57c2ce. 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/FR3KD1505414.
Die Zauberflöte, K. 620: "Ein Mädchen oder Weibchen wünscht Papageno sich"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487c29a8cc00bcff16f534a4f24801f66ff1d421e9e71b08e369710eb04bb312. 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/FR3KD1505415.
Die Zauberflöte, K. 620: "Ach ich fühl's, es ist verschwunden"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1105bde34d1604d0b8a98168702a9653b0ede1600c427805e95c891f07f47a40. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/FR3KD1505416.
Die Zauberflöte, K. 620: "In diesen heilgen Hallen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96c1c606c5e4eea735ed716435a39dcee566fec89035a18daab7452b1d83cbf. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/FR3KD1505417.
Die Zauberflöte, K. 620: "Der Hölle Rache kocht in meinem Herzen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2475e7f35c099c4f1a472d255603feaef3b93574477d78ac3acef4ccb200fe1. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:14:23Z), 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/FR3KD1505423.
Die Zauberflöte, K. 620: "Papagena, Papageno"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7672bf9afc9de55eb70445864d980ed4ef733031a3a11c215e4c2ddc6ae6b2. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:29:05Z), 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/FR3KD1505424.
Concerto for 2 Violins in A Minor, RV 522: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1fc18eaaebdaf412d11c100569ed20344baeb11d46b79330d611495307a3f9. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/SEWDL9250723.
Die 100 Beliebtesten Melodien Der Klassik Fur Kinder
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc91176f6cb6165526a05fd06d1f82b393f9c2a468d0d9f849e1e20de463de8e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITS041400137.