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 0x5f5952537ca82c5e8fb0d9f70757bec15658c3d501df833af5fb1e6fc9240afb. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50d68fa7-03ae-4c39-98a8-abf3712813e6.json and https://artists.proofprofile.net/proofs/artist/50d68fa7-03ae-4c39-98a8-abf3712813e6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Germaine Tailleferre: Fantaisie sur un thème donné de Georges Caussade
Fantaisie sur un thème donné de Georges Caussade
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 0x6ec2abf9aaa4469dd70eaf616ce2a59d17fe0258652d0f6085d5298bde92f359. 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/FRPZ92303341.
Jeanne Leleu, une consécration éclatante, Vol. 1: Musique de chambre et mélodies
Quatuor pour violon, alto, violoncelle et piano: I. Très lent - Vif
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73348cd3fc14f5b9ba3a86696357352f430ab441cff5c46fbc45c5f643309d74. 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/FXR722300010.
En Italie: IV. Les Compagnons de saint François. Lentement, et avec infiniment de douceur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0269571e927ab6e4405eb129a1932c36821e4a13670e4958df11dc1c7289b73f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FXR722300130.
Elfrida Andrée: Quintette avec piano: II. Andante maestoso
Jeanne Leleu: Quatuor pour violon, alto, violoncelle et piano: III. Allegro
Marguerite Monnot: L'Hymne à l'amour (Arr. by Gabrielle Panetrat)
L'Hymne à l'amour (Arr. by Gabrielle Panetrat)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f0276da669a4447c0411962ececeb67b85bef47e2801e5114b83d4b631a507. 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/FRPZ92303401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8acec455388f2fe75aee6a206b322e14e7b587b317a2ef3ce3020d9a32be7f6. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/FRPZ92200560.
Chants de la lande, Op. 4: I. Les Farfadets
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0f656b178c75bde12d5c87ddf93db84e6abd872bd87f41abf2f90f43b30449. 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/FRPZ92201180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e9ded48325ebba621c8644fc561efe6da078cf4e7831997e17c5327c981e79. 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/FRPZ92201240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d24667d44bcfea2de976ad2e7658fae2e6cd1a98131210533d3f56e0993dee7. 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/FRPZ92201250.
Quatre Pièces romantiques, Op. 30: III. Berceuse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286ba83bf34c80befdaafb050c7b9a8821dab6a3e6487dd3b6b1890b49ed3be6. 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/FRPZ92201300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e658c0b1336fea62709b7982a8cd296f965e73421d880bfcf8ebd4b66e3015. 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/FRPZ92201320.
Vally Weigl: Songs Newly Seen in the Dusk: IV. Living a life
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350b542f9698fe4511539f64f3f694876cdea62a594be1723bee0e8410d04e0e. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/FRPZ92303361.
Grande Fantaisie-Quintette: I. Moderato maestoso
Rita Strohl: Volume 2, Musique de chambre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4c9f46e664da4f1f8476b6d40ce3be2e8e3b9d4faeff4c5da8c6ffbadf973e. 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/FXR722300153.
Grande Fantaisie-Quintette: II. Scherzo. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d440c9f4813e590e56088ee934f31da3468542be160faaadb3c94e2bcf15ea. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FXR722300154.
Grande Fantaisie-Quintette: III. Intermezzo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581cf16c8b82034d80ca3af7c168f9a7ee75ef57bf7f07b968ee51de6d577ad1. 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/FXR722300155.
Grande Fantaisie-Quintette: IV. Thème et variations. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ec63727cc41bf4f6d069f7c6ed77f2fbbdf73146e520edd6b13dbe744ff7dd. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FXR722300156.