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 0xf36b74cecd333342c73a7c25067604b59e1fbad38ab963f7ef9bfed29044bc46. Chain 2 (Bitcoin): anchored in block 953879 (2026-06-16T02:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09cf6537-d82c-4aa5-b80c-264ece8130bd.json and https://artists.proofprofile.net/proofs/artist/09cf6537-d82c-4aa5-b80c-264ece8130bd.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
William Hayes: Concertos, Overture & Sinfonia · Capriccio Barockorchester / Dominik Kiefer
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 0x0be7136c570068b42ef42fc6c1dd1a34fe19d3b1d1c5e00f8b1a1d4b5d57e9f4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB6CE2000005 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe139223cdfe260341596873422ae955e94e463c28dd7298a2a6ced67ddc9bc44. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB6CE2000011 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc172dfec7a438017f02b1607f609c137334dde5bc07a8c3d75d1465743a43736. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEJP2118402 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685fa400e948a9392bb63dfbe5d8033419a816096c5792e70c7fdf5c8e797d90. 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/GBEJP2118405 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dafac8669112a21986e9e61d54b8fd64cb71e851e5670ea30ad7543dae47559. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBEJP2118406 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f1e4f6c06a24b02a94d9972e98e28b4e58df859f1849bbdfe8a114e26b8656. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBEJP2118409 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93a1ad3683a1232184955e30083c3eb478fa3f41c9e5d92705a2bc47bde3800. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEJP2118411 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fa9b166d4df8d1a2b45dfa5e97ef68266dfdbadb03c1766bd34431f2c08783. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEJP2118412 — a six-check JSON result.
Jauchzet Gott in allen Landen, Cantata BWV 51: 1. "Jauchzet Gott in allen Landen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cce4a978592ada42008eb30b952bef75b17fb9641bb82374e2bb6e7d499ccf. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/AUAB00650401 — a six-check JSON result.
Magnificat, RV 610: 1. "Magnificat anima mea Dominum"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de10bdf28f8ab270b1f2df50af4137420089d3a43938a96084dc9adc447bfb0. 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/AUAB00650406 — a six-check JSON result.
Magnificat, RV 610: 2. "Et exultavit spiritus meus"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a9f92a622995ee102e54f38eaec6429bfbdfc64943070f2b3a41eca758adda. 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/AUAB00650407 — a six-check JSON result.
Magnificat, RV 610: 3. "Et misericordia"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde99cb4d005e5d3aacd22295576fc06c13e578d59ab7bd6f9c4519d75d72b6b0. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/AUAB00650408 — a six-check JSON result.
Magnificat, RV 610: 5. "Deposuit potentes"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3b0960c756650c720c1913fe53918450dc9faad843d4194afa94cb0c6cfc78. 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/AUAB00650410 — a six-check JSON result.
Magnificat, RV 610: 6. "Esurientes implevit bonis"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6f5399917d09c43c5894c8f794c5be8788505f027a12aaaf67675cf53ed146. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/AUAB00650411 — a six-check JSON result.
Magnificat, RV 610: 7. "Suscepit Israel"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375635aacf67e05a5ef3c198313b4f20fd6aa9529223d32392a528f7d52ca313. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/AUAB00650412 — a six-check JSON result.
Magnificat, RV 610: 8. "Sicut locutus est"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26641948f90b56e5fc1c11ff0a05d5406ecd5a50a47f1ad354b8ee9d30183b67. 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/AUAB00650413 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36476e9675b4809fcedd6d712a9e1d5c09f415174de2f01c3aa8d296cc8cb7c. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/AUAB00650414 — a six-check JSON result.
Hayes: 6 Cantatas - Orpheus and Euridice
Ceremonial Oxford: Music for the Georgian University by William Hayes
The Passions: Chorus - Thy wide extended pow'r
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8cbdab84eb4aa532d6b1394dede12513d4b50427105a6acf3ecc62f96b7269. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBBGK1753402 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580a96744e3536066e1dfc7b27ae6451bf3b05fc8cae86542faadf2a90ca6533. 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/GBBGK1753404 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b32cb587dcf6063da13e4cf3ea6bb36a07180e3d8d38e688e0adb7aed41dcee. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBGK1753405 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ba5612da9582cd1dba0ec021f99ca0c6f1c96b9e91715e5b28072d445c30c2. 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/GBBGK1753406 — a six-check JSON result.
Classic Country... Polka Style (feat. Bill Dodd, William Hayes, Donna Little, Phil Pivovar, Keith Schwartz, Julie Tabaj, & Larry Caggiano)
Susanna, HWV 66: Crystal Streams in Murmurs Flowing
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f495db0f384bcaa4640011ae85b0e39bdea66942fef6606b566fb19ea5c2b9. 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/GBLWD1801301 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1fce74f638d7ea97f9144b89a6cb70cd5b40df39387253fca267d8191a8699. 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/GBLWD1801304 — a six-check JSON result.
Paradise Lost: It comes! it comes! it must be death!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52396e111658f0e60eedac2b39a997168906db08c49639b1d36510b44d33f1e0. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/GBLWD1801306 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5169bc2db437cf15f6e4e1e1c00211353dd922398af6d99b1c4f8efdf6972344. 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/GBLWD1801308 — a six-check JSON result.
Theodora, HWV 68: With Darkness deep as is my Woe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44414afe12424562cd4401401b5598807f3e8cbdef089da0d125e0206f7c0da0. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBLWD1801312 — a six-check JSON result.
The Choice of Hercules, HWV 69: There the brisk sparkling nectar drain
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600325e340c14bad0587a50b5d19d50507c741658ae3a5216084c2c2aeb9a86f. 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/GBLWD1801317 — a six-check JSON result.
Jeptha, HWV 70: Farewell, ye limpid springs and floods
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65e934e4bdaf38eeb28481919b35e59ae66de8e3e7b6d0585df5d1ade0c5c12. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD1801319 — a six-check JSON result.
Solomon, HWV 67: Will the sun forget to streak
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290db35afcebaa890613de5f75ee99dd19c4c4055f07f63230ec2412174623be. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD1801320 — a six-check JSON result.
Litany to the Holy Spirit (Version for Unison Voices & Organ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a28790e2f60184d912999fbf5ab24cb637eb5ed0e1f64b4bd12ba4d454e195. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USR9N1023812 — a six-check JSON result.