thumb|right|Cardenal in manuscript BnF fr. 12473 Peire Cardenal (or Cardinal)His name is spelled Pèire in modern Occitan. (c. 1180 – c. 1278)The estimated dates of his life come from Lavaud. was a tro
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xfa2c44a18ee34f72d405bbb205d4b3b149d5f9c235410904a4f35a4a2b5bf40d. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75efc274-ac7b-4fb5-b462-e7944551e0ea.json and https://artists.proofprofile.net/proofs/artist/75efc274-ac7b-4fb5-b462-e7944551e0ea.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 → block OTSBitcoinBlock must exist at that height 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 0x18e1d4e77aefa46ea0ccce8dc5f9a08a6e63d39a878c10ba0706c537a297d0b8. 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/GBAJU8300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9146d70cc79f2b2c72c138d96ad94b30c7676d8722fa3e618f37b51f1e8c6352. 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/GBAJU8300037.
My Vielle and the Rest (12th and 13th Century Medieval Music)
Aissi quon es sobronada (The Chosen Flower)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51347884e86a29cdfe3a5132e0a6b2236df6289b2b457d873a12f78df9cfd489. 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/QZNWX2216438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd5e4fcb7545a7caf2aadd00ca5b581eff3e856b372b7eeb6341eade6481bbe. 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/QZNWX2216441.
A chantar mes al cor que no deurie (For There Is Reason To My Pain)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e27c268ea364bc19d7c0762d804b7af9ccbdd6eaf951d3960e765c0c15b93c. 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/QZNWX2216442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe103cd22aa95095750999536be92a2dc023310c5f9662b8bcab324f6f6d5d734. 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/QZNWX2216444.
Un sirventes novel vueill comenzar (I Have in You My Good Hope)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51223997c03e315ba923668b0035a94418508118fb8f207801ed4cc579f483d. 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/QZNWX2216447.
Efforcier m’estuet ma voiz (Hoist The Gall From Me)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dccb9d81ab0b7cb3cfed91431d5a37722894e88b48b05cc6916b620680f50b9. 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/QZNWX2216448.
Edi beo thu hevene quene (Blossom Sprung From A Single Root)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67cdb257a2e41d66ddf194193bbd60374b322f02493e54e7f1ffd53d5e618da. 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/QZNWX2216449.
Michel Piguet/Ricercare-Ensemblefür Alte Music Zürich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63451ab29d889c6149f04c1f5d3f478c7ab616f8509d800775b8a52a8356e24c. 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/DEA340001145.
Non Perch' i' speri, donna (ballata) - 2000 Remastered Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42315668dfae6944703c370a7e145e78efe0d22a2db55716d2cb1f4e0ee57a1. 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/DEA340001146.
Messe de la Nativité: Antienne Ecce annuntio vobis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ab39c945bc0dfa6ff1302188bafcece56822ffcd9fddab02f04ab1f988c8a3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBAYC9400613.
Estampie - Istanpitta (2000 Digital Remaster): Istanpitta Gaetta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc591278c6a88c8565eea0dc77b130941a809e60eb50181ad8ab1842408dcf408. 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/DEA340001363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa687cd3f02bf64655274224973cca271d3f598d55cd06d2c9aaecfa82c577b83. 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/GBAAA9901598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85509ea7b77270ee3bbb8143576f0ae6700016dab482e72d22d95eadcdc479d. 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/DEA340001148.
Purple Classics Presents: Unicorns & Castles – Medieval & Renaissance Music
GBL Add. MS 29987: No. 91, Lamento di Tristano - La rotta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541116469248753030e730d929a99b0926741c6d405538839c3487eec368939f. 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/USB8U1611246.
Domna, pos vos ay chausida (Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09ce0419ef5da23688ebcba7159d152dce84e67d2891a3d1e3a97670307b045. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKI199703302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdc5213c83327e6bcf19210b8b15675890bddfad2ecda52e148c1f5c836d598. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/HKI199703305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ca745b860a5ea33b69e8e459ddfda292186eec79240e1b419348e2e95d0991. 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/HKI199703306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864065c98c14a236d70689c37ad9c734975b7653808de2fe20a575dc2dbc10e0. 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/HKI199703307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d870f7648da3c1f071c9e0914854ed28d33e5a59e213f65d32e344cd58598b. 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/HKI199703308.
Humils, forfaitz, repres e penedens: Humils forfaitz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1b4da5a3736f1c15ed9845db8eaa0b6dcb032609e4f944c951b7aa110429f1. 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/HKI199703310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa538c57bea360abed1437b265926ec9c6f8223262449080446d41d68d73e9322. 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/HKI199703311.
Early Music Recordings of Ensemble Unicorn, Vol. 1
Moyen-âge, chants et musiques du XIIIe (Medieval Music & Songs - Trouvères Et Troubadours Du Xiiie Siècle)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d676ffd433ddfac2560803ef5ccd4e6a30115673f68279225d86f35364d61e. 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/FRX199421454.
Presidents in thronis - De Roman de Fauvelle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d8fd9296d378d66f0f903c9e8a1481ef76f3d20808ac7cc64d0b99231c64e5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRX199421456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc093a959b51089e0c0112dae5c1a129335c35cff668d8af4987c9babfe2bd431. 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/FRX199421457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb25abf5760285b7677939e908b6d3ba1423a952928d03c2ff500406d17aafde. 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/FRX199421460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ad79ced9e76aa03200c565c30c78b4b85d20dd2afd7d9960b73a41e995533d. 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/FRX199421469.
Lo gai saber. Troubadours and Minstrels, 1100-1300
Musiques a la cour d'Aliénor d'Aquitaine