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 0x31e7e6ec71938d9d26c6cb5da465c3bc66f9a11925dca73628c0957a1f877fc8. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9db56f8-ea14-4198-b7fc-87a7400b6d23.json and https://artists.proofprofile.net/proofs/artist/c9db56f8-ea14-4198-b7fc-87a7400b6d23.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lost Is My Quiet: English Music in Purcell's Time
Come, Ye Sons of Art Away, Z. 323: Strike the Viol
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 0x5e68470bb524ab53953224a299ac4845e59085cba57b400a35bdce76ad41c9f1. 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/CAJ720330013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50260d6ad4b0171bbfce6aedb03709dea776dd8ce1327afebf98f822994297c. 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/CAJ720330014.
The Prophetess, or the History of Dioclesian, Z. 627: Since from My Dear Astrea's Sight
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfe15c951ea36449c71cf7a9dacd5e98cba255065adce5542981c12ff73173d. 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/CAJ720330027.
Charpentier: Motets pour la Semaine Sainte et Messes à 4 choeurs
Montréal Baroque Festival 2005 - Fruits of Passion
The Back-To-School Study Mix: Choral Music Edition
Rise O my soul: Gibbons, Ward, Tomkins & Bull: English Anthems
Matthäus-Passion, BWV 244 (1841 Version by Mendelssohn): Chorus with Chorale "Kommt ihr Töchter, helft mir klagen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2996afb351e4574b6f0a2668f1c27daf5f440fe475d8023583e099e922c5cf5. 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/BER182395301.
Matthäus-Passion, BWV 244 (1841 Version by Felix Mendelssohn): Evangelium. "Aber am ersten Tage"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6626f02de417f0473b553d73b98b66b646f66275000bf9dd74cc41047ce8f02. 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/BER182395309.
Matthäus-Passion, BWV 244 (1841 Version by Felix Mendelssohn): Evangelium. "Er antwortete und sprach"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abbef6333e26d745b9b26b04dd82afa89c07b18ca68e33baee712523acde93d. 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/BER182395311.
Matthäus-Passion, BWV 244 (1841 Version by Felix Mendelssohn): Evangelium. "Petrus aber antwortete"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69daa50f44ca821fed9e7587bacc521d33f74f2f3b00a2d6f65a1355a4db531. 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/BER182395313.
Matthäus-Passion, BWV 244 (1841 Version by Felix Mendelssohn): Evangelium. "Petrus aber sass draussen im Palast"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd933f30971fde99681d2d3dfc7ec087016103fd10928e50fc9e77dc73508f9e. 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/BER182395325.
Matthäus-Passion, BWV 244 (1841 Version by Felix Mendelssohn): Evangelium. " Des Morgens aber hielten alle Hohepriester"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c621f2628e2610e03c3e0e84667714c79e55440986682b17d6b124efddcbba1. 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/BER182395327.
Matthäus-Passion, BWV 244 (1841 Version by Felix Mendelssohn): Aria. "Aus Liebe will mein Heiland sterben
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301c9d014a492da3226d23f0f15c52a01a40b377db1c280aa6426673531f23fb. 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/BER182395331.
Matthäus-Passion, BWV 244 (1841 Version by Felix Mendelssohn): Evangelium. "Sie schrieen aber noch mehr"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f6965e5ac5e5de2d3ef5adf2631fad9438640ad0a731afaa50e701509ff4f5. 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/BER182395332.
Matthäus-Passion, BWV 244 (1841 Version by Felix Mendelssohn): Evangelium. "Da nahmen die Kriegsknechte"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026442753aa367fde7822b8f01099cc9e8b4a46a73ba2f6238379769c88ce522. 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/BER182395334.
Matthäus-Passion, BWV 244 (1841 Version by Felix Mendelssohn): Chorus. "Wir setzen uns mit Tränen nieder"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9686dd911c4f404493b529ca13878554bf92e8918886d69ce635407f5a8b9c. 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/BER182395345.
Musique sacrée en Nouvelle-France: Messes, Motets & Pièces d'orgue
Le chant de la Jérusalem des terres froides
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ccafa250aff5ed7d5f6fc8ee28122faeefe1c7b303d163d019a58aa8381234d. 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/CAJ721465302.
Sacrae symphoniae, Ch. 41, 12vv: Plaudite, psallite, jubilate Deo omnis terra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15232e721d3d49a4047d4f1c4f433f0dc4c729b3e04062786b7e82896bd456b. 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/CACA30410059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15232e721d3d49a4047d4f1c4f433f0dc4c729b3e04062786b7e82896bd456b. 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/CACA30410059.
Roma Triumphans: Polychoral Music in the Churches of Rome and the Vatican
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d8ff1ccdc82d2f271f8b712c1842183e5786b8d017f65bc1bdf878bc0f2b79. 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/USB8U2011646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b7efff3c9f804201d277ddd09c6bb0300fe2aea9fcd91d32063bc725aee097. 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/USB8U2011648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058c0bcc48347a08fd3a45de1b5ad777a6ee7bdfd7f1375deac6ef89cc6ae691. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/USB8U2011649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2e99a134a1aaa37b0eb3e75ec4ef8969b4d9b30c44ef16d3d782f26af4cb31. 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/USB8U2011651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9924710dbca706b142858cba3099d25254cdbe095e7aaad19f088a2383bbd8eb. 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/USB8U2011652.
Alleluía; Remember My Soul: Sacred Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7979ed2cdec66a999bb0a97e1331235a3f929052ad07c148f998b13b8635c647. 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/USA370578275.