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 0xbd0951596f42d3d86fa1c1be953ef038f8c6bd339aacd6d6c98b2b87ba462d42. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3efbf66e-1938-405c-925a-8a7e2488d74e.json and https://artists.proofprofile.net/proofs/artist/3efbf66e-1938-405c-925a-8a7e2488d74e.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 0x1174503ee59f5fe772230e238f8b33dfe434b8c402542915fa3fd36790020e6f. 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/FRU622260401.
Bachianas Brasileiras: No. 5, Aria for Cello and Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58238e2082ac3a5ef784549c534aabe84fd6b68b6570737ce3c924d5bf8f3e47. 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/FRU622260403.
Sicilienne (Transcribed for Cello & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e87b13805122962a31399133e3bfa11a3ab1f05443dfee5a502d03e00447a9. 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/FRU622260406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cd3552549afa16e8ebeadc74a5d27894cff5c25cb304b420d6a3e722b0cf8f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FRU622260407.
Les Folies d'Espagne (Transcribed for Cello & Harpsichord)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bcd823167bffe1fe0fdfbfa43f21f95cedd44fa32b59b293a96e94acdab680. 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/FRU622260408.
Détail pour violoncelle baroque et clavecin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ca4df28dc88c7c08701397a02c957cc98a93f447c47a7f932fc9fc555ee02e. 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/FRU622260410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b3d214a93c1bbbf0b416eaf873a1552c25a1acc93718f28ca7975821b9734b. 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/FRU622260411.
Sicilienne pour violoncelle baroque et clavecin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd8e52d3ee01511926ee894dac357c97a7574ef70126b46fecfd550c9afa7a9. Chain 2 (Bitcoin): anchored in block 959147 (2026-07-22T15:43:44Z), 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/FRU622260404.
Louis Marchand: Oeuvres pour orgue et clavecin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50992700e24fee96362408d4d25aeeebb79886b26bd47de1521635f76ad3844. 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/FRU622474001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e481eec362d8d1a30b48bae290d84f7bec94c75dded8a77539cb33bb4104d6c. 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/FRU622362401.
Pièces de viole, Livre 2, Suite No. 2: No. 38, Cloches ou Carillon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070790959331cce722b7f6b4979cb8e09afe1461cbe7c336dd077dfba88b4ac8. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/FRU622362403.
Pièces de viole, Livre 3, Suite No. 6: No. 82, Gigue la Chicane
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48627d52d1dfaf2b9a926e869b1dc6c7444fefc577c0f98b6dc241dc4394b8a4. 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/FRU622362408.
Pièces de viole, Livre 3, Suite No. 6: No. 86, Plainte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4602920df13a288e928d5e20815270e8a5a8c9afb5182a924372989775b4ab9. 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/FRU622362409.
Pièces d'orgue pour le Magnificat: Dialogue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9aac8ed3c671dc6042b96ebff51f4bd43e0e595b44c583ef59dc11b95f11035. 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/FRU622362411.
Pièces de viole, Livre 2, Suite No. 7: No. 116, Pavane selon le goût des anciens compositeurs de luth
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85ca177feb047705716f1323744d9f495d586329efd454e7fcecfa5202684d7. 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/FRU622362412.
Pièces choisies pour l'orgue: Récit en Ré Mineur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e3182539fbdfd0587fb3b71c3ae880c7935a89e91294553753da1dd26dedd1. 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/FRU622362419.
Pièces d'orgue pour le Magnificat: Récit de tierce en taille
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3120d965fd51dce814346fd5efb1e17f35753ae7283e29d1fcd5b9e0449a0c5. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:47:45Z), 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/FRU622362406.
Marchand: Suite in D (Published in 1699): VI. Chaconne
Marchand: Posthumous Book, 1740, Suite in D: Plein-jeu à 6
Dumont: Bauyn Manuscript: Pavane de Mons. Dumont
Boyvin: Livre d'orgue II, Ton 8: V. Récit Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e481eec362d8d1a30b48bae290d84f7bec94c75dded8a77539cb33bb4104d6c. 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/FRU622362401.
Requiem, Op. 48: Pie Jesu - Version pour orgue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4645c6880d90df9f8feff81cd3fa8148270b117fa8987918511aa237a738391e. 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/FR00W2200014.