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 0xa3040ccd80cb2d20d2f88607d1efd1e26018ff7d0ca8dd710f6a858916e9e575. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11f09cec-391f-4cc3-a4b5-01810b3a6b9f.json and https://artists.proofprofile.net/proofs/artist/11f09cec-391f-4cc3-a4b5-01810b3a6b9f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Metamorphose (n): Transcriptions for Piano After Romantics Composers
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 0x870fbdba2f78af7c237f8fa6c5339b5452210d69eac7a9b78fe9796afd8e8d6e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH1260990504.
Rachmaninov: Piano Concerto No. 3, Op. 30 - Rubinstein: Piano Concerto No. 4, Op. 70
Verdi & Wagner: Paraphrases and Transcriptions (Edition Ruhr Piano Festival, Vol. 31) [Live]
Sparkling Keys (L´Édition Musique No3 by Geldermann)
Sparkling Keys (L'Édition Musique No3 by Geldermann) - Solo Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0dc53e59172ce961daa48152677afa36788050d07802eb672504f8fa4ecd34. 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/DEW412200002.
Sparkling Keys (L'Édition Musique No3 by Geldermann) - Italo Disco Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330143a173581fb60803c323be72cbf5a9566668647cbba458df67a3e2f7a971. 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/DEW412200003.
Rachmaninoff, York Bowen, Medtner: Works for 2 Pianos
Alt-Wiener Tanzweisen: No. 1, Liebesfreud - Version for Solo Piano by Rachmaninoff
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bae519a24d0fcb8b1de29c340a1fbd486555d852acf60cfa463903c94f3e230. 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/FRZ132426001.
3 Études de concert, S. 144: No. 2 in F Minor, La leggierezza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97eaa0fea9af89034d63a7d1123578a19c1737f94ece78af7f9d5cf7a4bec25d. 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/FRZ132426002.
Alt-Wiener Tanzweisen: No. 2, Liebesleid - Version for Solo Piano by Rachmaninoff
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11d9dfa599468643702a7fe8e8720f4732a3c9ce51670e44feeb381cee69b86. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FRZ132426003.
Lamentations and Consolations, Op. 17: No. 6 in A Major, Consolation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49fcfe9acf174214e36adf66a77a453ab968e45c7300932ef5f943fc3c817d8. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/FRZ132426004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06006287f7f577a96217eafa32cfcb75a2bbd39d78e56b78ae2c93d128b6e94f. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/FRZ132426005.
5 Pieces, Op. 75 "The Trees": No. 5 in B Minor, Granen (The Spruce)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad24b3d9ceb4addf15b7c6be23a69fcf98cf3974b7c678412b843c4e735b1502. 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/FRZ132426006.
Iberia, Book II: No. 6, Triana - Version by Godowsky
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a122942d7b3dc2996161a0a9bb34ac6f12e7c0aa7a9a292011e194427b46f0e. 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/FRZ132426007.
5 Pièces, Op. 109: No. 5 in D-Flat Major, Mélisande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67a30656b738121b5c0cffa54e776f4acc2adff7fe4b4c210bb0c18aa1321e3. 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/FRZ132426008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8718aafa7be696ae80b4cd13999a33f67d403259db6183b0e411331be783fa. 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/FRZ132426009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d76f115458b8bffa9243f70c20ad63df8c9cd96003cb0850fb4c6332c36bd4. 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/FRZ132426010.
Lamentations and Consolations, Op. 17: No. 5 in A Minor, Lamentation (Le mal du pays)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92bc0156cd115a3f7ad1effd7c24a32e3f132ee55c327da9f58c3541289f924. 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/FRZ132426011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946331acd64b4fa1a08972a9c02bc9663a2236d931016cf7c3343bfd2f666b6e. 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/FRZ132426012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bd578b7de97095999fcac3b277448162226d639ae8531a22d0f4f3172197e5. 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/FRZ132426013.
Suite mignonne, Op. 39: III. Moto Perpetuo (Finale)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc02bb13001fb87cee300ae88e71f911b4acfc6a2248f9325b5c8598faaf57c. 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/FRZ132426014.
Troisième recueil de chants, Op. 65: No. 1 in E Major, Vivante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9d42f94e368f34cb6b0223bcd7e38f65b482ae9a3578d17f66f340a1c20d2d. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/FRZ132426015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd605ca0ae0305c268d9fa7ee3831ca0f442f4912e2ae69cb585ab4ee945e0bc8. 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/FRZ132426016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90db360afa7c441b48209b49932bc8f91a4080956100890526493e458b86fc1. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FRZ132426017.
À la campagne, Op. 40: No. 1 in E Minor, Jeu des ondes (Wellen und Wogen). Etüde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1da58c5a2ff8962ba4185fae34e20bf0256d7d7a80c5a241a5eb78625948cf. 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/FRZ132426018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e320cf9a0b92fdddc3e61e4d4c6acb78a9f185d8fe317ceb5ccf352d9f21b2. 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/FRZ132426019.
6 Pezzi, P. 44: No. 5 in A-Flat Major, Studio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a01525ce1b42c656f47be4892899f515e18a2ade7f8277a5a8c9b4df4bf5ad7. 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/FRZ132426020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6c5f9825d50b2682877c12086b777938d2d1cc6c21b3cfabc6b12ab122cb38. 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/FRZ132426021.
Piano Concerto No. 2 in B-Flat Major, Op. 83: II. Allegro appassionato
Brahms: Piano Concerto No. 2 & Strauss: Burleske
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f72c62a851914e13512ac0bc49a0145e228f1413c3288b5d372143eaf8f5f64. 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/GBPCP1700451.
Piano Sonata No. 1, Op. 4: I. Allegro maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea7e6811bd70c7c008f1390e6281114ae0514cc3ebf3ad4ca6be3e299c8c738. 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/GBPCP1600200.
Piano Sonata No. 2, Op. 35: III. Marche funèbre: Lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0429594026b3aa60cb1f9f9889065ae3f221702f394f48afc7500156cab5d2be. 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/GBPCP1600206.