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 0xb2942117aeb275e63ffb7604957333a0065e900b4d67828e573144b01d971303. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad751dfe-8845-42f1-aa30-7afc8a23dbd8.json and https://artists.proofprofile.net/proofs/artist/ad751dfe-8845-42f1-aa30-7afc8a23dbd8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Senfl: All Ding ein Weil - Songs and Instrumental Music
Morley: The First Book of Consort Lessons
Bellissimo Splendore: Early 17th Century Music At the Court of Brussels
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 0xd264d498b3a96c60139c82e448d897473479bd9252aa58cee429872a49cf7c03. 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/BER189919316.
Schmelzer, Biber, Pachelbel, Barthali & Turini: Deutsche Barock Kammermusik III
Dictionary of Medieval & Renaissance Instruments
Dame, ne regardes pas (Medieval Fiddles)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9941a5cffd48401a03a5183902f825c35f8e74edd34887d3a1f250993dbeba41. 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/MX2831000690.
Un verso de Morales glosado (Iberian Cathedral Organ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5d942a8f202a548e10e9257f58140a4f1d18bd09ef939e0b8ec61ed6fe1cdb. 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/MX2831000733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed0187233e93be40c99555e492c02b58d99fb782af04c482da0bf40781f14bb. 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/MX2831000736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1559e3d6df3b75ea953940a7cc920eba4e2618132123f55648a43961866cee78. 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/MX2831000695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dd66c32ca8c02f681f52387a25242e01669af6fb0cab0379b40cfd0f99650a. 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/MX2831000699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f41aef92d098e542df02cf26b0acc3ff72d20251892c7831c698889f210f84. 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/MX2831000700.
O dolce vita mia (Renaissance Lute & Voice)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc445d7c9d72b55a17bce127213b403a5d98693ec4e41a772e86e4777e197de. 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/MX2831000707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc561e1f0b21590be89615f77cbd957dae7753264faaaa044faa58ca5a92d3b. 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/MX2831000708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05c287e27e4517cb82d51317ce2582f883cc5b4d6a90c3ae0a957f3c9b3d035. 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/MX2831000714.
Gagliarda prima (Sopranino Lute, Guitar, Archlute & Viol)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1efaafc1a65ba126cddb8a72eaa15ffd0febeca73408e75f219c46d978b0e9. 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/MX2831000715.
In seculum d'Amiens (Ensemble of Medieval Recorders)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dabc86b277ecfe008658d9fbbcc05572fd82e9b8e7f6d67e56f4e4c8f6040a2. 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/MX2831000717.
Triste plaisir (Renaissance Recorder & Viols)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf1ff424ce67e9161f062924f761ceeb901a6e6ec09cff051bd10aa7905dd8d. 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/MX2831000719.
Correnta sesta (Quartet of Renaissance Recorders)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47462c13597deceb9ab62ba38f647e3f3e4292b8519b3e0496434e974687ab05. 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/MX2831000724.
Gentil dame (Renaissance Harp & Traverso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b8a4c91a0c07e8d79407f924b753bdff7191f298dbbb334fa5f3e2df4a3783. 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/MX2831000725.
Ungarescha (Renaissance Traverso & Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870f6c127847631a18c89ef6b54ac8ad6cb4440598b5e80bde858b39f160cee7. 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/MX2831000726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee65676de15cc0ad9a5ee9f56a71408adef885076101d7f46c76cc2c92c340d. 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/MX2831000728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f283a6d156d70134a14227d1295ceb47243cac8290622fd5ca3890f92ed43f. 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/BER181435209.
Trio sonate in C Minor, TWV 42:c2: III. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078eea25f67fbfbee9eff2151614ba31bd1826aeeededbd55639109587ad19ce. 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/BER189127010.
A-La-Mi-Re Manuscripts (The): Flemish Polyphonic Treasures
Missa, "Myn herte heeft altyt verlanghen": Missa Myn hert: Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3711106eef4d3419bce8bae3ecbe9eac7c054578ebc3678903730d6bf803e2ae. 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/HKI199929801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac66e32f0c29fc29dd9e191f373218c0f23ae4944660e2c2079bcc0999ec5eed. 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/HKI199929803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7561b2577a9af710be3d62001c9fae98b8e1d5df2a5d0d1208b0d165a63ae2. 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/HKI199929804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba4cd1067d0837d1b4f860efb7abe3ce5917c0d9cbd5574f4027c3f352fe937. 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/HKI199929805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a91396d85a9a2132bf3c74adebf7f1dda7e467c072e5174c349be02a4ccd04. 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/HKI199929807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd87d0fec1af5c6723166a47c66e5e49fd67bf5947fd443b195ab3169a68fda8. 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/HKI199929808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a478b3a727332492294ae5ab7d5c1bbf029a0334daba38475dc963ee49bba5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKI199929809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa594d8b9915d3fe48fa405bfa508369a569d44a9b5a589d665c3a382203dc0. 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/HKI199929811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1def5d3a0fc450c9974700265fa14dccfcbc8b99d963ec1756f17158f5be8711. 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/HKI199929812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd678586d3a7732a9460d982a6f84735072cc38a3c1b1ffee269c9b92305b58be. 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/HKI199929815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629dfa1700be69a09edc26c5a40d71cb7b99544ddb11c669394e9f9ba7b98ef8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKI199929816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f5550f8fbe8a1560af12616dc4f0e8e323528ef98683ea8dfaf1886dce3434. 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/HKI199929817.
Celeste beneficium - Audiutorium nostrum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2f15bdc329f2d1973939b64fde59b5f1a5a33df0670c3930ccb6cc20222881. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/HKI199929802.
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 0x0c67914a65b95d098003eb90f83cc3fb7452f400c0f06cfadaeef718efa9b893. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/HKI199929806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd308f083aec55d4b7e6cb7991c36952e96be58561cc01a860e71ea7e03eb32. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/HKI199929810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b47e03116b3a96c65452aeb8aea1fc917d8bbb9f613f2c29912d70758abcaf. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/HKI199929814.
Sonate A-Moll, TWV 41:a3: II. Spirituoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3947fb8ff87fb6787e55228c73d45841967af3cdad77227ee7af8b029baf49dd. 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/BER181637518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1c0732a554c0f02f0e2b93fc806b3676d803d3dc24c53f3c2f11b4559917e0. 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/BER181637519.