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 0x3c881fb65d88641a8d3fd778b24d2f110c48119bda019581875b00b740db33cd. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b516baf-422e-4793-8689-72472d416950.json and https://artists.proofprofile.net/proofs/artist/1b516baf-422e-4793-8689-72472d416950.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Walton & Barber: Violin Concertos & Works for Strings
2 Pieces for Strings, C. 50j (From "Henry V"): No. 1, Death of Falstaff
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 0x22392d9ce364f9f4382a5bb5e87269bfe7747187950a76f1175c7a8acb220a3b. 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/USPMZ2313004.
2 Pieces for Strings, C. 50j (From "Henry V"): No. 2, Touch Her Soft Lips and Part
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd295a9e512ac3374996a937e087435edd16b3e06226cad688bb85281b6b44507. 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/USPMZ2313005.
Violin Concerto, Op. 14: III. Presto in moto perpetuo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ea4ee5f5a407806128660efae8a186705f6655498e0a1851ba4f5c3a58c7a9. 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/USPMZ2313008.
Johannes Brahms: Sinfonia in B (original 1853 version of Trio Op.8)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624fb11e68bc97ed1ee4bf5d90235770829210aa3da59a08823b5152a632f769. 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/USPMZ2313009.
Peer Gynt Suite No. 1, Op. 46: III. Anitras dans (Anitra's Dance)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ccb1062d8a40e15a95d16498a3025cd13b5b0fb79b023d9017ac6a66692f33. 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/HKI190744403.
Peer Gynt Suite No. 1, Op. 46: IV. I Dovregubbens hall (In the Hall of the Mountain King)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dd3d2b5129cdbd404ac5259674c3315482f36881468eba9e3984cbd7eb77f5. 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/HKI190744404.
Symphony in D Minor, Op. 17: III. Adagio molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0473cf6a348f8cea0f39201383f3989180ca50cac4b82b291274a072c6a9074b. 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/SEWSJ1650517.
Bengtsson: Violin Concerto in B Minor - Cello Concerto in A Minor
Violin Concerto in B Minor: II. Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756d25951abed434c201ec0cea8d726934668ec0c7ec3a12f9157bdb65f27768. 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/SEWSJ1650616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298b3f13d95823ad9894f4755c6c2207ed8890411b7076a19af7091a44bbedd6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SETSA0184060.
Piano Concerto in A Minor, Op. 16: I. Allegro Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2253e4c5d71d4c3fb93891be5b2a97c5e44e4e61839760a80445c98d4469fe. 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/NLY331902900.
Piano Concerto in A Minor, Op. 16: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d22d7ba03a897a8e483c4086889f735f13e718b3b533d7f4d68f5aec202f304. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NLY331902901.
Peer Gynt Suite No. 1, Op. 46: IV. In the Hall of the Mountain King
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec12b7fa8487bf68bb4872f163bb0c8a06b7218e409ef56f95fecd456ff7d1e0. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/NLY331902947.
Fauré & Poulenc: Works for Piano & Orchestra
Ballade in F-Sharp Major, Op. 19 (Version for Piano & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3e07602429295fd9728d8830001c66d1370c748091f1aa1f7db55313554e19. 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/HKI192356101.
Piano Concerto in C-Sharp Minor, FP 146: I. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11494250b2e8e4e9518b10c51488445ca48da049f64573ad395a0dff15d87338. 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/HKI192356102.
Piano Concerto in C-Sharp Minor, FP 146: II. Andante con moto. Commencer très calmement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351d425aea0dcf941e1b6eec9c9f1e9b61757bb86606eff5055b55f0e1cb49e1. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/HKI192356103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb660e849489e110aab98276c98790538f8032ce6c212c6c957d304cd08a646. 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/HKI192356105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75caeff00123d77a8ce5687205f5a5925e35c61de6adeb33c03f0da66cd4d4c7. 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/HKI192356106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf512ef6e8689f856788b5b07efa157fa10076f309d8ab5999996d80be4c2be5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/HKI192356109.
Landkjenning (Land-Sighting), Op. 31: Landkjending [Land-Sighting], Op. 31
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d90a295222877fe982c5bd3ea2b2b013c5c37dfa20a02f16cfd9b05fcbcec1. 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/HKI191159006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd946a4112d4345e845df3c82d7dab68683d04259fa70079514f9575f7b054b44. 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/SEBAA1100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ac164e6d4e07d0b160016b9432f9aa7800f1131824c3a6792010868e6ab8c6. 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/SEBAA1100201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6b4a2da8a9fac92cb5e91b1ea82e2f72c7b8d9d690fb34acf54519bbf8e570. 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/SEBAA1100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4190bffe82fec51394313406bdf32468eb75eb7ff84e6479cca3693bc7e0500d. 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/SEBAA1100103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fdffbc9c7f59de4d2a32a3af69b41b5a1f6f02b6eb4e0b525a74ff9218fa40. 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/SEBAA1100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1ca4bee42763d5fd9ad6cae4f90806b2b724b544414d1567672479289ae323. 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/SEBAA1100105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdc1199e73d668df78e974e2c76efecc5fb377ce197c6cff3e1edcf1d515c9b. 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/SEBAA1100106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc77a11126f52b5502746265a402ac21a780b17d3b3f8ee536d2d38f77c7753e. 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/SEBAA1100107.
Anna-Lena Laurin: Piece from the Silence
Cliffe: Symphony No. 1 - Cloud and Sunshine
Tovey: Symphony in D Major / The Bride of Dionysus: Prelude
Grieg: Olav Trygvason, Landkjenning, Sigurd Jorsalfar & Resignation
Price: Violin Concerto No. 1: II. Andante
Violin Concerto No. 1 in D Major: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf670eaf8fc89b7e79cd51f811471ad25cdeec3430d7525bb9c0d55735354436. 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/HKI192439502.