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 0x3c4565e0f4ac8883c2ec0a050dce738908cdd83981a763de042233f18dfed995. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db3d7cb4-e8b2-4202-8d00-4e72cf0e7dfa.json and https://artists.proofprofile.net/proofs/artist/db3d7cb4-e8b2-4202-8d00-4e72cf0e7dfa.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Sonate pour orgue No. 1, Op. 42: I. Introduction et allegro
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 0xa3f1df6d25e65fb9e866eee46b3020399d977d2ac61de1bf7c48fc9aa8737351. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX401300001 — a six-check JSON result.
Sonate pour orgue No. 1, Op. 42: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bddc29df4c7f757689b9130621f4d8c2442fb523137a28e3722c222536e875a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX401300003 — a six-check JSON result.
Apprentis sorciers (L'esprit symphonique français)
L'orgue classique français: 1650-1800 (150 ans de musique du Grand Siècle à la Révolution française)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b828106f806469bf8441dcc3cbac35eb363e6cdfdc5728c558b2c087c3c3796. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX400400050 — a six-check JSON result.
La route des orgues, Vol. 13 : L'orgue Cavaillé-Coll de Lunel
La route des orgues, Vol. 14 (Orgue Merklin de Commentry)
J. Alain, Duruflé, Fauré & Poulenc: French Choral Music
Cantique de Jean Racine, for 4-part Chorus and Organ or Orchestra, Op. 11: Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54825cfc73fe60a2ce67233cab7b062a9340dd9ec692541565649081e5e8b042. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ130010021 — a six-check JSON result.
Messe de requiem, for 4-voice Mixed Choir, JA 125: I. Kyrie - Sans lenteur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce40e04d4114a29e4cd61bd3411d3f3883fb1fd52cc8ccdc3366e99f0c7193b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ130010041 — a six-check JSON result.
Les grands orgues de la cathédrale de Monaco
La route des orgues,Vol. 11 : L'orgue Valoncini
Antienne grégorienne à la Sainte Vierge - Ave Maria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2f003ee0542ccab440193aee7780e529f02a52aa4c6d8d9632ad96720df09e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX400900208 — a six-check JSON result.
Bach: Clavier-Übung 0 (Un album pour la jeunesse)
Haydn: Concertini & Flötenuhr (Concertini pour clavier, 2 violons & basse)
Corrette : Noël 1788 (Messes pour le temps de Noël - Nouveau Livre de Noëls)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a1e493301ba1534b385dea3bd60ffb04bb5f6d086cdc1472e8680880c1439d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX400700002 — a six-check JSON result.
Choral-Partita, "Wie groß ist des Allmächt’gen Güte"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33c18ed56b16e378f27bc56542cc0c817b39a8a773870695b1592091ef74f36. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX400700003 — a six-check JSON result.
Präludium und Fuge C-Moll, Op. 37, No. 1: Präludium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee837682b0367f2086dc0d5c5027de074805309c2dd3fd55d6310fb13b4705e3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX400700008 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41df3c7dfa7f77e308c8c7d4b1548418fbeda52d72abe8abcd94d724458f5b97. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX409200041 — a six-check JSON result.
[Choral und Variation] "Herzlicht tut mich verlangen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7357f178b824196b10b6ac792d2159c5e9b99577c9b5e06c09be624c92fe09f8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX400700016 — a six-check JSON result.
La cathédrale de Tulle (La Route des Orgues, Vol. 10)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b66c14ac677925034fffc88f97c9feb6521316f3d3e2ce945c97782f6b82905. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX400601021 — a six-check JSON result.
Mozart & J.C. Bach: Sonates all'epistola
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641e00e64a24cccf139b00ad3956fb9aa9ead6be7f75deb89292b5650da02732. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX400400063 — a six-check JSON result.