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 0x4711f43f71fc4025ddfb1bdf7a24201424f706665d8d15691712b8177cd8ecb3. 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/25bd555e-0f48-4b0f-8962-64b9f55b5eff.json and https://artists.proofprofile.net/proofs/artist/25bd555e-0f48-4b0f-8962-64b9f55b5eff.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Straume: Concerto for Violin and Orchestra – Vivaldi: Violin Concerto in D Major & Concerto for 2 Violins in B-flat Major
Mozart: Serenade No. 9 in D Major, K. 320 "Posthorn" (Digitally Remastered)
Mozart: Serenade No. 5 in D Major, K. 204 (Digitally Remastered)
Mozart: Litaniae de venerabili altaris sacramento, K. 243 (Digitally Remastered)
Schubert - Symphony 1, Symphony 2 and The Trout
Mozart - Offertorium, Piano Trio No 7 and Serenade for four Orchestras
Beethoven: Symphony No. 9 in D Minor, Op. 125 (Digitally Remastered)
J.S. Bach: Magnificat (Digitally Remastered)
Borodin: String Quartet #2 In D - 3. Andante, "Nocturne"
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 0xc94da63ec294513b777c367d1213ed4dde7c7c53db29de609d7aacea499e748d. 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/USSJ10401384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b945d57d2b84ceaa6174d7632ee4698d2a4e5bd97fe41c4af1595d030bbf5d. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USSJ10401380.
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
Mozart: Litinae de venerabili - Missa brevis - Offertorium
C.P.E. Bach, Telemann, Vivaldi & Bach: Baroque Flute Concertos
Locatelli: L'Arte del Violino, Opera Omnia III
Die Trompete vom 18. Jahrhundert bis zur Gegenwart
Mozart / Grieg: Eine Kleine Nachtmusik / Holberg Suite
Wesley: Concerto No. 4 for Organ and Orchestra in C Major (Digitally Remastered)
Concerto No. 4 for Organ and Orchestra in C Major: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b46ca9d443ab3a19a0028221ff9e56ad7b0b927b6a1afd2f275bb1d7171888. 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/USGZ21561798.
Weber: Grand potpourri in D Major, Op. 20, J.64 (Digitally Remastered)
Toselli: Serenata Rimpianto, Op. 6, No. 1 (Digitally Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e5ce6f0157ef7f901c971cca34f494fa54d7489430c8eb1c7b065c096ec948. 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/USGZ21561628.
Tchaikovsky: Variations on a Rococo Theme, Op. 33 (Digitally Remastered)
Schumann: Panis Angelicus (Digitally Remastered)
Schumann: Album for the Young, Op. 68, No. 2 "Soldatenmarsch" (Digitally Remastered)
Schultze: Three Overtures (Digitally Remastered)
Schubert: Wiegenlied, Op. 98, No. 2, D.498 (Digitally Remastered)
Schubert: The Trout, Thema con Variazioni in A Major, Op. 114, D.667 (Digitally Remastered)
Schubert: Moment Musical in F Minor, Op. 94, No. 3, D.780 (Digitally Remastered)
Schubert: Military March in D Major, Op. 51, No. 1, D.733 (Digitally Remastered)
Ponchielli: La Gioconda: "The Dance of the Hours" (Digitally Remastered)
Paderewski: Minuet in G Major, Op. 14/1 (Digitally Remastered)
Offenbach: The Tales of Hoffmann: "Belle Nuit, Ô Nuit D'amour" (Digitally Remastered)
Mudge: Concerto for Organ No. 4 in D Minor (Digitally Remastered)
Mozart: Wiegenlied (Lullaby), K. 350 [Digitally Remastered]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b91c9a02a4b7cb4061167fe9c60bf25f2c5b9fbdb4590329adb77b54e00d3d. 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/USGZ21455150.
Mozart: Symphony No. 27 in G Major, K. 199 (Digitally Remastered)
The Most Relaxing Classical Music In The Universe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6546a02667a50360fbc689dc36447b352ae0d37d7cb4102c47ddbda6815696d. 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/USSJ10301388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ab345b7dfb87041477c58e94e0d0b2be5f2d6673a69984f28179205dea8a89. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USSJ10301390.
Songs Without Words, Op. 62: No. 6 in A Major: Molto allegro vivace "Fruhlinglied" (Spring Melody)
100 Most Relaxing Classical Music In The Universe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933ce3ead24bc63710e75f74dcaf1c40944dfaf3074d97328961f6fd60c9a310. 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/USSJ10813870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65032402a496d550f84e96e6f6e2bcc8398fcf03c5ccf822b064dd507fd73aa9. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USSJ10813875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506df3a939180dad061ca6916223cfed86ee2302e66b601f98451867c0baca14. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USSJ10813885.
The Greatest Classical Collection Ever: 222 All Time Favorite Classics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd758162d281299ec8e4174aeb048aad90e573d9107dc98fb85accc9595be38c. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/US4R31334356.