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 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, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be7136c570068b42ef42fc6c1dd1a34fe19d3b1d1c5e00f8b1a1d4b5d57e9f4. 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/GB6CE2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685fa400e948a9392bb63dfbe5d8033419a816096c5792e70c7fdf5c8e797d90. 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/GBEJP2118405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f1e4f6c06a24b02a94d9972e98e28b4e58df859f1849bbdfe8a114e26b8656. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBEJP2118409.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEJP2118412.
Magnificat, RV 610: 1. "Magnificat anima mea Dominum"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de10bdf28f8ab270b1f2df50af4137420089d3a43938a96084dc9adc447bfb0. 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/AUAB00650406.
Magnificat, RV 610: 2. "Et exultavit spiritus meus"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a9f92a622995ee102e54f38eaec6429bfbdfc64943070f2b3a41eca758adda. 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/AUAB00650407.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB00650410.
Magnificat, RV 610: 8. "Sicut locutus est"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26641948f90b56e5fc1c11ff0a05d5406ecd5a50a47f1ad354b8ee9d30183b67. 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/AUAB00650413.
Hayes: 6 Cantatas - Orpheus and Euridice
Ceremonial Oxford: Music for the Georgian University by William Hayes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ba5612da9582cd1dba0ec021f99ca0c6f1c96b9e91715e5b28072d445c30c2. 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/GBBGK1753406.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBGK1753402.
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 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBGK1753404.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBGK1753405.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD1801301.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD1801304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5169bc2db437cf15f6e4e1e1c00211353dd922398af6d99b1c4f8efdf6972344. 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/GBLWD1801308.