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 0x1da8fb33d9203b2ab897168ed49d081b7145264ca925aee53b0c0b7602779370. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d2abbf3-6d60-4866-b79c-14c18bade885.json and https://artists.proofprofile.net/proofs/artist/6d2abbf3-6d60-4866-b79c-14c18bade885.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 0x1dfdafcb9dddc20f6431878a7f74845081d53ee60fe36b5c83f7d8a65d411c9c. 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/GBAYC1900187.
Monti: Csárdás (Arr. Berthollet for 2 Violins and Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abc7097673a69439470b0af05e616ecc9f9a3b38f9aa01527622bcf4d28a823. 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/GBAYC2301869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c426b3de7dfa48d03beef8ec78639bb6e7a3d3a13917e692d767d655b12b8a. 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/GBAYC2301864.
Gounod: Ave Maria (After Bach's Prelude, BWV 846) [Arr. Berthollet for Piano Trio]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79098070f21f29a8b7691a04053514a829bd6e404a25de5ece47abf462f533b7. 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/GBAYC2301856.
Popper: Hungarian Rhapsody, Op. 68 (Arr. Berthollet for Cello and Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d203b33a3f9a297883ecd45742617a3fec5d7982540bff4fc819cf7fcaccb86. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBAYC2301862.
Chopin: Nocturne No. 20 in C-Sharp Minor, Op. Posth. (Arr. Berthollet for Violin and Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f071948e90692ca710ee98ac591cee627219368c0f2f4fc38972b459cb91c7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBAYC2301859.
La valse des noces (Arr. Samuel Pegg d'après Le Beau Danube bleu, Op. 314 de Johann Strauss II)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e9b257f827493669e165e7a48e7d1270ecf17ca1c17c27f513a79cfadd050f. 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/GBAYC2001808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfdafcb9dddc20f6431878a7f74845081d53ee60fe36b5c83f7d8a65d411c9c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBAYC1900187.
Le ballet des épousailles (Arr. Martin Batchelar d'après l'ouverture de Guillaume Tell de Gioacchino Rossini)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf423663ca023c8f67aacc9e30ab7f2837dca7355ddd33d3cec424c063e5904b. 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/GBAYC2001811.
Les Noces de Feu (Les musiques du spectacle, extraits)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf423663ca023c8f67aacc9e30ab7f2837dca7355ddd33d3cec424c063e5904b. 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/GBAYC2001811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4fad96449f93334b8c221a49d500ebcbe63607570e2eaff0825640815be5ce. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:31:15Z), 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/GBAYC2301857.
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
Tchaikovsky: Suite from Swan Lake, Op. 20a: I. Scene "Swan Theme" (Arr. Berthollet for Piano Trio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f4e32eb04050dfbb6179eb813198d97f9591ebae4204d6b815e1963c23bba2. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GBAYC2301863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e090896450b2ff2aacdbd6c1947043e363ad558fb60b3bf96aabde52692988. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBAYC2301865.
Beethoven: Piano Sonata No. 14 in C-Sharp Minor, Op. 27 No. 2 "Moonlight": I. Adagio sostenuto (Arr. Berthollet for Piano Trio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55dc00d110a67e5f07b9f1e32a9edbe1750e9a990f800e73cd4d5824a03f9ae. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBAYC2301866.