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 0x49209c4ae0b5a53e7e9234f9cea1db0828edeecda241ae28ae3622b352e64624. 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/375fc0a7-65fe-4d1e-b4a0-764b70b45dc4.json and https://artists.proofprofile.net/proofs/artist/375fc0a7-65fe-4d1e-b4a0-764b70b45dc4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piano Concerto No. 5 in E-flat Major, Op. 73, "emperor": Piano Concerto No. 5 in E-flat Major, Op. 73, "emperor"
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 0x5f848ae64ac640416682d4ff8280a48fd96a73cb37241e9804c63bd187193af9. 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/HKI199213605.
Piano Sonata No. 8 in C Minor, Op. 13, "pathétique": Ii. Adagio cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a336c4ee52cade43600e2a777968b19a63e8dc3d45d28f922e458be183dc4e7. 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/HKI199214302.
Cello Sonata No. 3 in A Major, Op. 69: Iii. Adagio cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3d7930067eff720e0492ca8de7df1f66e86907c9031993177e56c2a4d4717d. 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/HKI190229822.
Septet in E-flat Major, Op. 20: Ii. Adagio cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d383d114a91e9cd48e510836a4bf2d64934a201d0aaad8698454f6b7302e487. 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/HKI199215602.
Piano Sonata No. 14 in C-sharp Minor, Op. 27, No. 2, "moonlight": I. Adagio sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae375756518e9df9b2ae0d94a4e5ec10916a0638d2f27ede3ae8676196e12203. 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/HKI199214304.
Piano Concerto No. 5 in E-flat Major, Op. 73, "emperor": Ii. Adagio un poco moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae375756518e9df9b2ae0d94a4e5ec10916a0638d2f27ede3ae8676196e12203. 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/HKI199214304.
Violin Sonata No. 5 in F Major, Op. 24, "spring": Ii. Adagio molto espressivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5512613c47021052ebe88ea9e4de14434bf44029e3e6a5a6823f9a305ab19fb9. 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/HKI199217802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d0f39aba8b1a79993064213e7135e4dedd602de68ec1e7ce2740e9a03f5961. 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/HKI199202005.
Beethoven: Chamber Music for Horns, Winds and Strings
Piano Sonata No. 14 in C-Sharp Minor, Op. 27 No. 2 "Moonlight": I. Adagio sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae375756518e9df9b2ae0d94a4e5ec10916a0638d2f27ede3ae8676196e12203. 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/HKI199214304.
Bagatelle in A Minor, WoO 59, "Fur Elise"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88ea202db5fc0098d6b9f8e168873770fe80adedebb329181ea37cabbe7eb8f. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/HKI191435601.
Septet in E-Flat Major, Op. 20: II. Adagio cantabile
Concerto for Violin, Cello & Piano in C Major, Op. 56 "Triple Concerto": II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8926b51d0cf315db3682c7de9f39465533cb41cd6f9d5d7fbcf87eaf2b1d3a2. 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/HKI199803305.
Piano Trio in B-Flat Major, Op. 11 "Gassenhauer": II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c31ce856ed1d1fdfd390ad2a414939579bfcfe1f1979691b7c39d708b40939. 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/HKI190301102.
Piano Sonata No. 8 in C Minor, Op. 13 "Pathétique": II. Adagio cantabile
Violin Concerto in D Major, Op. 61: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c21fdeddaf346f60b3bf791598f5b4b804cc4f7be486a3ae1abe41058fc5bc. 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/HKI199940302.
Cello Sonata No. 3 in A Major, Op. 69: III. Adagio cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3d7930067eff720e0492ca8de7df1f66e86907c9031993177e56c2a4d4717d. 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/HKI190229822.
Violin Sonata No. 5 in F Major, Op. 24 "Spring": II. Adagio molto espressivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5512613c47021052ebe88ea9e4de14434bf44029e3e6a5a6823f9a305ab19fb9. 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/HKI199217802.
Quintet in E-Flat Major, Op. 16: II. Andante cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e32f9ed57696f158c2af24bd7e517d133fd5223d6bcb841408e0d382ee8e27. 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/HKI199213202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a336c4ee52cade43600e2a777968b19a63e8dc3d45d28f922e458be183dc4e7. 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/HKI199214302.
Violin Sonata No. 5 in F Major, Op. 24, "spring": Violin Sonata No. 5 in F Major, Op. 24, "spring"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5512613c47021052ebe88ea9e4de14434bf44029e3e6a5a6823f9a305ab19fb9. 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/HKI199217802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f848ae64ac640416682d4ff8280a48fd96a73cb37241e9804c63bd187193af9. 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/HKI199213605.
Symphony No. 5 in C Minor, Op. 67: I. Allegro con brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcd2754af8909937a7b29b8a8a51b8d225084161bfa9eea6491e3f9f4e8b581. 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/HKI199216401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb325efafb1f9b385ff56b4be78f68a1cb8fc63e2dfb5163773a98565881b35. 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/HKI191516202.
Symphony No. 7 in A Major, Op. 92: II. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b515213061ea3162faf5ceaaa34d1da3d7ea4c6b0de7c4662f7699b21710330. 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/HKI199597302.
Piano Quintet in E-Flat Major, Op. 16: Piano and Wnd Quintet in E-Flat Major, Op. 16: Andante cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018c669ac1ee931779169dbebf042c56b3bf434abbfa85f9d634f3b5214ab014. 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/HKI199615807.
Schubert: String Quartets (Complete), Vol. 7
String Quartet in C Minor, D. 103, "Quartettsatz"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d145226be8bbf1b27981c6f6f60a2a9d7869224bb9dd6e4ae43504b7524f7d0. 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/HKI190586501.
String Quartet No. 5 in B-Flat Major, D. 68: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed426144f210409a49689733f5b7a1d3f3eee77f21299aeff569fb3ac2a8223. 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/HKI190586502.
5 Minuets and 6 Trios, D. 89: No. 1 in C Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27828fff9121b5f449c3553630b745397f32f87daa9668311038420ed3ef14ce. 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/HKI190586505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683acb5f14a1ed8aec08963e5774b0db699924a9d0082d4aebd4e39e5a21fbf6. 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/HKI190586510.