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 0x00075f918d34c3244c60b761bf34b806bdddf6c4489a13bd66161e26d1401334. 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/01348966-0aa6-419e-ad3b-1817566a12d0.json and https://artists.proofprofile.net/proofs/artist/01348966-0aa6-419e-ad3b-1817566a12d0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bennett: Piano Sextet, Op. 8 / Sonata Duo, Op. 32
Vivaldi: Cello Concertos Nos. 1, 4, 7-9, 11 and 12
Atterberg: Violin Sonata / Trio Concertante
Berwarld: Piano Trio No. 4 / Piano Trio in C Major
Piano Trio No. 4 in C Major: Allegro - Adagio - Finale. Quasi presto
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 0x03d927a548e57a327e457fd9952c21072d9fc7b87300b610900914c7ee979baa. 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/HKI199352506.
Air from Suite No. 3 in D Major, BWV 1068
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106884dda5d2cca0e606426d742e1acba83766b19a9c341c9547fef953df9b3e. 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/DEA740512435.
Adagio-Allegro-Adagio from Concerto Grosso in G Minor Op. 6, No. 8 - Christmas Concerto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c3e74c7d141065cf47436ce041a2bbcde40b240b0afd623ea78d13c40a7011. 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/DEA740512457.
Lento assai, cantante e tranquillo from String Quartet No. 16 in F Major Op. 135
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6c98770df2846de8942fdb6d9f5159644d9682b8c00596b6f82c0a9a7dafda. 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/DEA740512475.
Adagio from Cello Concerto in C Minor, RV 434
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d9745dcb32d49016c8db1fe548a84903d0f413f39f0d870d2b8113d7c31f97. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEA740512456.
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
Composer’s Portrait, Vol. 1: Eine Deutsch-Jiddische Kantate, Tsuchigumo & Other Works
Beruhigende klassische Musik für den Alltag
Music for your Travel in Italy: Remeber Venice
Berwald: Piano Trio No. 4 / Piano Trio in C Major
Chamber Concerto in G Minor, RV 103: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088ccfb642db57ea80ef4e099fb4ffbbe4df6e3be13ffa3fa33823f368e16f04. 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/HKI190423303.
Chamber Concerto in D Major, RV 92: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943e9dfaf2d89754ab9cf6418c5cb1d2c37e5ba2005a79b38958c3effbd0c0f9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKI190423304.
Chamber Concerto in D Major, RV 92: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25ce729d00159d76a06347c55eef4836942d09eb7980f7af46468fc41067ebb. 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/HKI190423305.
Chamber Concerto in D Major, RV 92: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff0d00f32e6b6804c0bf4e5ae7d5dd9c17dc488aeb1f9daf4b9579fd287bfe1. 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/HKI190423306.
Chamber Concerto in G Minor, RV 105: III. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dfb83f040807465c9c939f7c39c1c1ca99e9ec4796171549bd5359cb7f2ec3. 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/HKI190423309.
Concerto for Recorder and 2 Violins in A Minor, RV 108: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abc01333c4de4648b2adeee68052b598d66a639a2ff7c407333c6a43d234da8. 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/HKI190423313.
Concerto for Recorder and 2 Violins in A Minor, RV 108: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb039f66bd7a5653a3361f3745d0d452ff0a6ff8238392f66e981a01685ba4c58. 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/HKI190423315.
Concerto for Recorder, Oboe and 2 Violins in C Major, RV 87: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894edd1bf94b8dca21c47577a8506a547f8c9d0e1ed53ddf629ae06dfd48892b. 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/HKI190423316.
Concerto for Recorder, Oboe and 2 Violins in C Major, RV 87: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b14e8cf8f98593e97df99c915657268083653cd82fe25da044f3cf4360cc77. 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/HKI190423317.
Concerto for Recorder, Oboe and 2 Violins in C Major, RV 87: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94ee1cbf81397f3d36edc53a2045a0fe62ee53c485bb049e135f2e04033024b. 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/HKI190423318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fba50e67e92ea3886a09632f4b2a647b1ae026697a81baab6a70f50ecdff96. 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/HKI190423319.
Chamber Concerto in G Minor, RV 105: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf061516f59b67745950d57c580102b37a26b8bb542cc1d35218e37a9519474de. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/HKI190423307.
Chamber Concerto in G Minor, RV 105: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a48ae038e18f3a3528076ab1e445a53acfd3a18707ac1de529df19784fed0eb. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/HKI190423308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931fe42a01007054f6535a9a54d1b8b80aad45e656b2f03b9b769169a8bae109. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/HKI190423310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0549f8c92b32ae383596abab3495dcc49f7b4f55748ee496883b43131e4117d7. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/HKI190423311.
Concerto in D Major, RV 94: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4137e9866015e5e3e7db5487ef83b02b7f7c2ecbbe10b7a0e241b43f8ac633c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/HKI190423312.
Concerto for Recorder and 2 Violins in A Minor, RV 108: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68588ed062b00282f6936d72ee9ae45ecc5c6379a52952012bce2765fe963f54. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/HKI190423314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bc66b175b2a0e189f5076361675cc05a01a7eb629140c9f139ef504809f90c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/HKI190423320.
Concerto in G Major, RV 101: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe407aff41638c3246e49d45ce36b664149be4037d95686b73c301d4542a59400. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/HKI190423321.
Atterberg: Piano Quintet / Suite No. 1 / Horn Sonata
Piano Quintet in C Major, Op. 31bis: I. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464dcf2ec2e75da29fec78afa86a487b887bd0ceff1b8c2a4fdfd83ed576d6c9. 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/HKI199352001.
Suite No. 1, "Orientale": I. Okenstamning: Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1668397dfc543c7a0a5b0362908aa6bdffb81cff39c5e2276b363169a009d6. 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/HKI199352004.
Horn Sonata in B Minor, Op. 27: II. Adagio molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c08df45084ce0d1c17b2b2c5d9c14058e4b95b8138fb226baf1fa5b8fb5a58f. 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/HKI199352008.
Adagio II: A Special 2 ½ Hour Collection of Orchestral Classics