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 0xfe1163e30fe59695abfa372996cb1448528596a56a9c920673a89edee8619c04. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4406762-c8c3-49a9-a25f-146d1e56f040.json and https://artists.proofprofile.net/proofs/artist/b4406762-c8c3-49a9-a25f-146d1e56f040.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 → 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 0xc995e61cb4fbea14689858ab3f0ec6ab4624f868065fe84450c01f799a39f1dc. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USQY51473562.
Plié in 4/4 - Go the Distance (from "Hercules")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52b1120ac8a80d90119475709f5c704536d1e80ee938006bf5cf056eba2dace. 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/USQY51473563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba53191782efb86540467607d062dab488a401f25083b02887df1195ed2ccc3. 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/USQY51473565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411a9b97897831b5fcc10c87791504ffe1128039bdcd88c8b6d369314d96d6fe. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USQY51473566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7de364cf7cd32d0190028b1609bf7d6ae0efcd9b07fe9ccdfbe3fef8b525b76. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USQY51473567.
Fondu in 12/8 (From "Nocturne in E-Flat Major" Op. 9: No. 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce7300ceab46a8f9ce63cfb78f2327364e7051b7a37863f7694c05167c00df1. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USQY51473568.
Frappé in 4/4 (From "Beauty and the Beast", Belle)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c9d001b2d32a29fd90e45e746138cc7066830104f05a9b426c6963c7d3f1bd. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USQY51473569.
Adage in 4/4 (From "West Side Story", Tonight)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b0ae5c9a3bf60ba3c0a9c071aa8a6b8a5ae195e5d5514314f3cc38a870eafe. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USQY51473572.
Grand battement in 4/4 (From "Rhapsody in Blue")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1834b51ff8dbb1abb5a169eac97ccc7601b86a54ced8a95be7c6c8beaaf48619. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USQY51473574.
Tendu in 4/4 (From "Nice Work If You Can Get It")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16182bec22728eeef3cd3e3ed74118067013038b52cb00fe54df9f43b93690ec. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/USQY51473576.
Adage in 4/4 (From "Mulan", Reflections)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c8dd0c8c4f7c2df2494496725aa6682e804472c11ca108b2c5de81a22ccf83. 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/USQY51473577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a4a86dbd9d0de9211d864af2c9c0ac7c5baf95d7aec0bff0257624f6547b93. 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/USQY51473579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b88ba56ac801c73a3ecd46eab0f503ee9d168785ac81f17c9dcf0e9ac621613. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/USQY51473588.
Grand allegro in 3/4 (From "Don Quixote")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1cf82c939bb00ac944b55963e6c495f0a19314e1e1951dce58e659ad3d332e. 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/USQY51473589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bc0ee88027a586c17f1a5a2f23fb0872d74e03e47c16a8b7336355997fa6f0. 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/USQY51473591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e8a8f3562e386a07fc7f4ed13761a4b4b97a2bec60d0df0a6c6ccc6bd5d0c9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USQY51472117.
Grand Batt. 3/4 - Masquerade: I. Waltz (excerpt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9720b5a872586beaa7c013a7a8dfa01c690aa6f0d822b4e466a1f2b4bb2ae614. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/USQY51472128.
Pirouette 3/4 - Künstlerleben, Op. 316 (excerpt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b07a57765df1fdeb93994b7e27c5af2f21d0a3c919556f2751eae63c02a840. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USQY51472134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44b98e6550278911451bd4d0033ea56646c7aff4ead47d31bf63d95a8c703f9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P1645492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1a5a4d9806d5251e02494f914c588dd9cf2e80443caf579b204a3f7a17786e. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USA2P1645493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d9649352efb7b88978c202b0426d22f1c9285e7fe9ee9c0def12de4e257930. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USA2P1645495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08d24c9684c5df5babc60c9a74fe5f627eae5c84db244530644cf161a29e0ac. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/USA2P1645505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd870228174da174c0bf8790ccf6082e8d42b2097603abb9ea3950e639ecb3f6a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/USA2P1645514.
Plie 3/4 - When She Loved Me (from Toy Story)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcaa298725b8ff738418249fc85c4763ec5047e10aaa8acd4f05654a6b98883. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZ8251715690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08aefd4a72f548829b5cc76ed4a37772416b07d9801807409743394fb4482c1c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZ8251715697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93581fc4bdf9c33e0e17c82727fc0111e91faa6dd7bd1260ceb93890b1f6b686. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZ8251715708.
Music For Modern Dance Graham Technique Vol. 1