thumb|Portrait of Adolf von Henselt, with scrap of music thumb|Portrait of Adolf Henselt, composer (1814-1889), before 1889. Archivio Storico Ricordi. Georg Martin Adolf von Henselt (9 May 181410 Octo
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 0x79f2b73706c219a94ad2da0515ef6794f09471a799ab955d7b4edc176b4eedf9. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a00aded9-16c6-4c8d-b287-8a80165730eb.json and https://artists.proofprofile.net/proofs/artist/a00aded9-16c6-4c8d-b287-8a80165730eb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Deux Nocturnes, Op.6: No. 2 "La Fontaine"
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 0x0d4686dfcbb7d9b486a6292f60109a4ca2daededf86ee2933c99c4af4585b375. 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/USACX0901827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b9cce89e0c31de4f92a2eeaa8140b6e40a1ec5a83fb68d77332f75a90d8c55. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/HKI191424201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006d26a64fa048b2945dd483c51ce7b4a2afcfad33dd9c500a25ce6afa7c9513. 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/HKI191424202.
10 Pieces, Op. 13: No. 2. Etude, "La Gondola"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4881be348544d906d82394533fc536e5d5fc5173fbca74f4bf30e7fe7406d7ce. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HKI191424203.
2 Nocturnes, Op. 6: No. 1. Schmerz im Gluck
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cd743fcfbb22016f59807cc67178551e5dbeff2aec6a79b7b0d18c0e7bbb23. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/HKI191424204.
12 Études caractéristiques, Op. 2: No. 6 in F-Sharp Major, "Si oiseau j'etais, a toi je volerais!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63dbd38093ffb4fbd135351d707913b7b01769d2c117b7594709e40501a8ca8. 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/HKI191424205.
12 Études caractéristiques, Op. 2: No. 3 in B Minor, "Exauce mes voeux!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7550c7c0223290216a9e8b0ee2ab18cd97f119a320c254ed06199b355af4bf. 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/HKI191424206.
12 Études caractéristiques, Op. 2: No. 4 in B-Flat Major, "Repos d'amour"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a03389a4498e4ebef023693f74c9c28d5e3790224bf16e55c109b60c808139f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HKI191424207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383cbb2ad073476a8248a293c3819598afb27d941408ba10a515edc58b8ace3b. 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/HKI191424208.
2 Petites valses, Op. 28: No. 1 in F Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1f3d44271cc74c79306378e387e2842e8fa8d285ef069c6990cc5116a4bd80. 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/HKI191424209.
2 Petites valses, Op. 28: No. 2 in C Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af86a322c2c11d2c4e93939b7f8c888990c94047c2568301884b5238a7baaf9. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/HKI191424210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca7a2dd7555632aa770077a63cd87ba4969769ddd2748fc8703edb21a404440. 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/HKI191424211.
6 Romances Russes: No. 6 in D Minor (after Dargomizhsky)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88de70e38211d38e7edc4fc8661305214c5522e91271cf65426dbedab059055e. 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/HKI191424212.
12 Études de salon, Op. 5: No. 3 in A Minor, "Hexentanz"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf770e92cc994828eb246f3aece98ef32bc46a542b72fbb52a7ee86fa50488b0e. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/HKI191424213.
12 Études de salon, Op. 5: No. 9 in A Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e815af6cdafdb0610355b45919ec2a408444053d8b87b09ccadbb3de47267b8. 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/HKI191424214.
12 Études caractéristiques, Op. 2: 12 Etudes Caracteristiques, Op. 2: No. 2 in D-Flat Major, "Pensez un peu a moi, qui pense toujours a vous!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ea6fcdcec55c3a6493d48b11c13f44984dec3fb8166d2c92a7c7175b7f7767. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKI191424215.
12 Études de salon, Op. 5: 12 Etudes de Salon, Op. 5: No. 6 in A-Flat Major, "Danklied nach Sturm"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c7b9b18a727b6858e42471a17a4ba60d4ccbb38eaffc3c4289796afd7a8b64. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/HKI191424216.
Erinnerung und Freundschaft, Op. 4: No. 1. Rhapsodie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c048e06167f4f389f932379a35a8350c592ba4d25978f45b0afb828b34bdbc. 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/HKI191424217.
Aufforderung zum Tanze (Invitation to the Dance), Op. 65, J. 260 (arr. A. von Henselt for piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c56ed9a9e1b92aa0ed749e2994780f6542910196d68055644995f372e11faa. 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/HKI191424218.
Henselt: 12 études de salon, Op. 5 & other Piano Works
Henselt: 12 Études caractéristiques, Op. 2
Henselt: Salon studies, Op. 5: No. 4, Etude in E Major ‘Ave Maria’
Friendly Classical Music That Lets Kids Sleep Well 3
Harp Classical Lullabies That Brings Sleep Gently 5
Etude De Concert, Op. 2, No. 6, Si Oiseau J'etais, "Were I a Bird" - Welte-Mignon 1654
Women of Piano. Great Female Pianists of the Golden Age, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91cc2d40389bdd3b34e2ce8ec08c662b57f46fb2df4354fa429a924bb2d0d37. 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/DEPI82319902.