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 0x10aebb5d338558eef71e14b7a4f3c82f606894cb0c0d0ab82fb4dc182ed1189c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa2fc492-0b95-4e4b-9e15-5bb7b2786619.json and https://artists.proofprofile.net/proofs/artist/aa2fc492-0b95-4e4b-9e15-5bb7b2786619.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pearls of Russian Romanticism, Vol. 2: Tchaikovsky · Mussorgsky · Gliere · Ljadov · Rachmaninov
The Nutcracker Suite, Op. 71a: II. Dance of the Reed Flutes
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 0x199312358685ba52a5b6a91a63daeb123ce7ccf5463c5030f3f6cb2fa1a330dc. 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/US3L61500715.
The Seasons, Op. 37a: VI. June: Barcarolle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55398a42735f486c387000e7775a56b53bc61bc927582896e3db5ece6b500cec. 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/US3L61500718.
The Nutcracker Suite, Op. 71a: II. Russian Dance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c819d51408023e71bfd60a224f0bd859e536b0c40f2ad4e5f7e3aedcaf6daa. 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/US3L61500722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18b9f5f913e366fb0cf9d672fd49c8a70b1705da736c4688eec31c900eccf27. 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/US3L61500729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59860f9973c3ef7cdec17706e40555c3145d2e457ab3ec86aa6d1826375ee7da. 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/US3L61500730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86021ce8eaa461cb17d080cf3fee01da3181dfcdcd19c9ee457887849222395. 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/US3L61500733.
12 Pieces, Op.40: VI. "Chant sans paroles" Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38729496e99a94901ef6aaba5accf4f556adf1b1d57bfca829cf45ada32e94d1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US3L61500716.
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
12 Pieces, Op.40: II. "Chanson triste" Allegro non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad7f0fe8cbabae38c000c6dad008a44fa3836da1a3142a8a4ec31bd4ebf82d2. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/US3L61500719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fc2f5b662322ae7d9863d94e545c9fe79bbf9fd187796320f786f50dfd0329. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/US3L61500723.
Lieder ohne Worte (Songs without Words), Book 2, Op. 30: No. 12 in F-Sharp Minor, Op. 30, No. 6, "Venezianisches Gondellied"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e4afb4592b7920d592e783fe9c741627782c48be692042aeefd4363ad17415. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US2TL0928211.
Piano Ensemble Recital: Baynov Piano Ensemble - Strauss I / Felix, C.-H. / Wolff, O.L.B. / Ravina, J.H. / Chabrier, E. (6 Hands On 1 Piano, Vol. 3)
Radetzky March, Op. 228 (arr. T. Baynov): Radetsky March, Op. 228 (arr. for piano 6 hands)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef5d633e21f2caa98f4e15d1d648626d45d6d66b8647ec6bf4d8fbec1c9cc26. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEFG20440201.
Piano Ensembles - Suppe, F. Von / Steiger, C. / Streabbog, L. / Alary, J. / Aladar, J. (Baynov Piano Ensemble) (6 Hands On 1 Piano, Vol. 2)
Radetzky March, Op. 228 (arr. for piano 6 hands)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952c4134878c856e44d67224913a241720d8595ad00ecf238d29108a9fd45698. 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/DEFG29835634.
Tritsch-Tratsch-Polka, Op. 214 (arr. for piano 6 hands)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fa17486e3160076c0356394136e32e5b517e5e1fc81cae12cb31685b9ff97d. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/DEFG29835635.
Piano Ensemble - Gershwin, G. / Rachmaninov, S. / Falla, M. De / Benker, H. / Lavignac, A. / Gautier, A. / Hirtler, F.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e131a6cc66109d6d9ed1bba35b2cd88bb13d1fd8edd66fde5a1c0a1ebf39f2. 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/DEFG29433205.
Piano Ensembles - Boutry, R. / Hirtler, F. / Vladigerov, P. / Wanek, F. / Bach, W.F.E. (Baynov Piano Ensemble) (6 Hands On 1 Piano, Vol. 1)
Clásicos Inolvidables Vol. 22, Romanticismo
Willot, J.C.: 13 Episodi / Antheil, G.: Ballet Mecanique / Feldman, M.: Piece / Goodenough, F.: Dance of the Apes