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 0x072f270e2a958afb11b0f8dc38d5d85a5f5d9167b2824e499e1f4931ba4d2f86. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e01c2efd-3508-432b-a0ca-744d376a961f.json and https://artists.proofprofile.net/proofs/artist/e01c2efd-3508-432b-a0ca-744d376a961f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Passages. Hidden Treasures of Classical Piano.
11 Bagatelles, Op. 119: No. 1, Allegretto
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 0xe322ebfd20fc91606f09d04486adb3ed2f13c7ecab39b482bff110dbd8553c85. 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/DEPI82325411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506c97c64b44ff60b0fda7703338405834357b7f34b14abba40ac434558d6f4c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEPI82319112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908b16dd8a203f109317f494816e58e4d5cfa8dc0248c183193aa742189a43b3. 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/DEPI82323865.
Haydn: Sonata in D, Hob.XVI:37: II. Largo E Sostenuto - From Aeolian Piano Roll
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5844f86d8114c214846d8ab1c30a8aa9a7ad32fa91bcda95033b8ea18154e3cd. 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/DEPI82304419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67339ee772016e33a9a16866a5f67163e667abbdb44b4b75fe9fb8f09d0570bf. 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/DEPI82313924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f16182d7d402f7516f22d20095f97a486937d7bef30b68aeecd8c7d5bcd03ae. 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/ES5086700253.
Soler: Piano Sonata in F-Sharp Major, R. 90
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ec7c2d125cebad16b852ceb2d4cfc7017f618f4a62a4bae4c46164d2a417c0. 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/ES5086700256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e0a199d747f8991e9ae787729a7dee8796c78bb920dc6d3bbebca89754109d. 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/ES5086700252.
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
Soler: Piano Sonata in F-Sharp Minor, R. 85
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bf3c367c49f88bb5b0277dd5bcfb8156d2dbd6e59fcee321c207127e9bb22c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ES5086700254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a436c10dd9cb6bc19f36a02af503194d23bcb81ed70e1fe0c66f4db11206a5. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ES5086700255.
Soler: Piano Sonata in C-Sharp Minor, R. 87
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c05f78d1c556aa9eac7a2ccc743a45b036c162905dd725f40b3e10317ee0baf. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ES5086700257.
Soler: Piano Sonata in D-Flat Major, R. 88
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab81e3da761de848323be5963bc70a1b7d5115c84f8daad4040c0480394de95. 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/ES5086700259.
Keyboard Sonata in B-Flat Major, Op. 8 No. 2, R. 98: II. Minuettos I & II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898178e6206b62532a7d7d2e3d6891e6483bd2593e529e4a2a21f38eb1f1f133. 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/HKI192145310.
Antonio Soler: 127 Sonatas for Piano, Vol. 4 (R. 84 - 97)
Antonio Soler: 127 Sonatas for Piano, Vol. 3 (R. 64 - 83)
Antonio Soler: 127 Sonatas for Piano, Vol. 2 (R. 34 - 63)
Antonio Soler: 127 Sonatas for Piano, Vol. 5 (R. 98 - 120, M. 23 - 44, Fandango)
Antonio Soler: 127 Sonatas for Piano, Vol. 1 (R. 1 - 33)
Padre Antonio Soler: 6 Conciertos für 2 Orgeln R.463 (145)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2ff939393bb3a6d79981bf6784d604aeb909e6f5a46a00de900bcbc52c652b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKI191726908.
Fray Antonio Soler: Villancicos a San Lorenzo
Antonio Soler: 25 Favorite Piano Sonatas & Fandango
Soler: Sol de mi fortuna, Sonatas from the Morgan Library
Soler Complete Keyboard Sonatas & Six Concertos for Two Organs
Quintets per a instrumets d'arc i orgue obligat, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba640003926882f2fc5f9ac4024a70faf2b52aad478b55a413e624c63480448d. 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/HKI191350707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d54e2d360c7b6354c4bcaf51c1bbdf13ccd1b8737ffc1b67d317564cbc46950. 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/ESAAI0202450.
Reminiscences. Hidden Treasures of Classical Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91b76a0b783de03b1a362fc65947d5a2f09cc0b360705cd949a31364369db35. 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/GBPFW1100646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b56ec503295bfb77cef700e2b140ae7cec75621cb413be0ec37f14b105cbdbc. 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/DEE862301375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1306be0c45e655fed229fd45f9f2e0c4886c68310fb183b153fe2927be6197d5. 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/GBAYC8905086.