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 0x9f4d0d32a145af433fda9451773fc5ea8cf442e331fdc9199566cfb127500577. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/031a93fa-5a07-497c-9a51-2e61a17c4b19.json and https://artists.proofprofile.net/proofs/artist/031a93fa-5a07-497c-9a51-2e61a17c4b19.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x38e4debc3c9e4d0e7ddade96d7b323d00f7684e0cc801d2fbe4ba406791b8c9a. 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/USA370522466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725e66e50596e97892fdb6fbe6497bba2f286f3842d81b1393718fc6ae008202. 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/USA370522453.
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 0x42c78d17b0430a71a150286f21a63d10b1ff59e793df310dbc3d17479392277c. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USA370522477.
Cantate Oh Di Betlemme Altera Poverta: Introduzione (Allegro-Pastorale)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea33d1075b51b60141b149385e4f92ca73c302784b8bf0eb6408910d2908ab6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USA370517295.
Concerto Pour Cordes Et Basse Continue En Re Majeur: Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56f9cfff836ffd0fb7ab5266be06e7eb090e0462514591398b0acee12b6e3cc. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:50:44Z), 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/USA370517305.
Mensa Sonora - Biber And His Contemporaries
Sonata VIII A Cinque In G Major: (Allegro), Presto, Allegro, Adagio, Allegro, Adagio (Biber)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe51d0b3f093c3dd954978456444880f9388e21b4f32e7151ffc0de25914484. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA560609702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616ff89486320b2922d0187119fd438ce22cb61cc462c79a739a2d6f0ca24115. 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/USA560609703.
Sonata II In G Minor: II. Allegro (Muffat)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cccf54ac8d92682daf5c8f6b44f2a2c28d6fc0c87ef568285490c6980c6575. 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/USA560609704.
Sonata II In G Minor: IV. Forte E Allegro, Grave (Muffat)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ad8eb19f749bdf2995fb9fa3298acd2818919bc559b44f79ec08133507f7ae. 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/USA560609706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cc76bcf4bcd6fe603141f824dfe61fdd2aab58958d15e2fb0d3e33fa6bf917. 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/USA560609707.
Sonata II In G Minor: VIII. Borea (Alla Breve) (Muffat)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2713d44b77abdfb262dea2efcb2bcd5a53454916ca915178f198ca1c6ed280b3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA560609711.
Sonata A Tre Viol Da Gamba (Excerpts): II. Allegro, Adagio (Nicolai)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6708b90e6aa4aa52ac1982062f2ee5f20825ba51178875b0e8fb0c97034f708b. 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/USA560609713.
Pars III In A Minor: II. (unspecified ) (Biber)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906b1bceef303c1509ee1055a484dd522859db176ae31268ccbd5346598ec07f. 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/USA560609716.
Sonata IX A Cinque In B Flat Major: Allegro, Adagio, Presto, Adagio, Allegro, Adagio, Presto, Adagio (Biber)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ea0ae6e172ca6686caa765d7abb71924119464bcc0f3324327baad3127e4ab. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/USA560609722.
Pars VI In G Minor: III. Canario (Biber)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab445c4a1d76ff78a4fe849b699a45f04b645ca74805179b304f0536e724a02. 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/USA560609725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931a64ef2116a161fd551617b7d1cc34c36cb33d99c0f84c73519137bf44f088. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USA560609726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043ec41c24c29e401e342a5ebbc1e1df874fd4aac0aab9bb4a0138dc848b7bd2. 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/USA560609728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfded71cdc275c112f4f5d9e3094fd72cfdf7e334709b55ad43049cc1f0ad57. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA560609730.
Sonata II In G Minor: III. Grave (Muffat)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244545c1c343fbefc3c0440726b0220d760722677fd53215e6f73e74a815d836. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/USA560609705.
Sonata II In G Minor: VI. Grave (Muffat)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bdfd1c0ec84e40acd3e71d71310ae3e8662dfc784933ff51dc5e38a5188bbb. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/USA560609708.
Sonata II In G Minor: VII. Sarabanda (Grave) (Muffat)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c13f3f61a2d5c3ec2e5f2ce28a95840717eb026411a70e26acab5cb404cd13. 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/USA560609709.
Sonata A Tre Viol Da Gamba (Excerpts): I. Adagio (Nicolai)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18907bfcfe89150fa327a301881e88d8d3c841f4350095b2c7deb56f31ad1266. 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/USA560609712.
Sonata A Tre Viol Da Gamba (Excerpts): III. Ciaconi Adagio (Nicolai)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02a8d48e28a9346cf8511c71979348a2e655dba8bc27401f27b7e4b42bd8577. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USA560609714.
Pars III In A Minor: I. Gagliarda (Biber)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98583bea0e259c05199cf302f3e781d2ed3c7124f676a5913bb8a386ec9c7838. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/USA560609715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfb26d2d901d4df24e77ad4b84f09ea1c1687ba1823ec438db34502824d13a8. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USA560609717.
Pars III In A Minor: V. Sonatina (Biber)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30480e003571078ef1246b08f06ab8e6a1d4b4eaf7d66b9518a65cb1a8384104. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USA560609719.
Sonata VII A Cinque In A Major: Adagio, Allegro, Allegro, Allegio, Adagio, Allegro, Adagio (Schmelzer)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a892a820e46c251cf542573faa49858af0d3b70589a0029ee9a7cad5796a0f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USA560609720.
Pars VI In G Minor: I. Sonata (Adagio) (Biber)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb1d65881c369fa8bfb7be0e895b6cd2d76420bd4dd81691e915981ab29ee86. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USA560609723.
Pars VI In G Minor: VII. Adagio, Presto (Biber)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb254591e7cca528588ec64c1804b36d327dfe9fdacfcc75ecf5ee45cb3743e. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USA560609729.
Harpsichord Concerto In F Minor (BWV 1056): Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c776ba16eed326df665efb6007446e335c7ce310587d2d08cf37e0de95a11b8. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:52:46Z), 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/USA560681585.