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 0xa72d56bfd8165fe63453607f6d612b992ab209fa6b9c6a0abda3cba966faed7f. 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/304541ef-91d9-4ca6-9774-3a9e2dedade0.json and https://artists.proofprofile.net/proofs/artist/304541ef-91d9-4ca6-9774-3a9e2dedade0.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 0xa968b27bccd4f89eb76ca3e0c83ac2004645a4b5fc439266b5e4e7980e990030. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6M2230341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368e47a9330a90607207715ff385149387a63bccaf5fd020120e34c1a2101447. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2374327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d66ef66a64aa01873dfb2dc92789571cba7e3cf4ae58542b9cc74227337fec6. 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/QZNWT2468143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d553646e945d0bf78246965918265adec8bc30c99c24955d3fb045d29bda23. 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/QZHN92415522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0566bef253e6afb87964277d382c67f987ad885d70d2be42990b575d50720b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2401265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b212345b7e25d23142e9a382bea0a924592e9965688423ead5a6d71e7bace2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTBA2328918.
Hollow (Abandoned + Danny Olson Remixes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b886fa220e0da2d4186543de1488bf357c7db540717793ce6cc78782788187. 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/NLE712300576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec894873bf4915d47da4667f694e2a1fb4ec559663dcb54233721b3deb1e7a6. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/NLE712300577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d5d248e36f7ef70dd898054ffae34f06ad53bca38e39729533759ac14f84c5. 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/QZK6J2313871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4fb7d11cb4419ce60db679636c07561dd4f721188a91e0fd7d9971d45985cc. 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/QZES52323076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb576378e107c6540b0b592b046d7419679860c6eb52f3de26a0aa697f568098. 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/CA5KR2304780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439d979c0b5a36453ee522926c0855439e648b757a60ec292f7ad3158954233f. 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/QZS7J2216577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdaae592698fcf09192f3289258051a8f5409f33eb1a48db07af8ab0fa14ad9a. 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/GBEWA2204667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f724dc5a9a83933d35b2b344acc30506aeba56ff5e5254d9e0442dd2a9468ba. 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/GB2LD2110402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabed4c7593d0ecf83a5ba22c061459cb3038871fdf89cd525d86583db67d16c4. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/CA5KR0024859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa721a88cc11b8579a7d26f9d4aeda1a333f8c01faa1cecace492f8e3289d0c27. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB2LD2110149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5335a7fbd1b9912ca7118a8363e214aa22d678e4336ad4e924f4f88a0951464. 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/GB2LD2110086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da1721d1bb0e48e12d41d0a8457e8a67f86955c0be0707e6bab2d5704ae989f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB2LD2110042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391760173689c5f090fc2f385b033bc9a4517cc554a528e2ea9d7e38f95cd0b7. 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/GB2LD2010305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12547f898df1e862b6f00ccbcf929b9f877dad7e5e2090919b01141c949ab517. 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/QZHCR2000177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ace56b1c320aeedfb7a6d86dc12c3218070c44aa608d69016403640ceecad59. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU8846072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a19be0bee623322f83a447f440f4bb4fdc0777b93618c518630ea8a72034809. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB2LD2010160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde72644b911f8e34d5f20f9bc03d9e1359eb6d8e902d3f54128e1270461dff12. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB2LD2010022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5155d85f79f87dd4d878951c69c43f13aeb4a32ff7b835d490b55bab10f2124b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB2LD1900377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532727a0d7469845322ad395df90d7e9cb2786ba5211f415db15e9e42129b992. 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/QZFZ41937954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53a85c9ed70c5a4f700a157e0b595281bed34056fb0c79170cc6a330e4f1c30. 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/GBSMU6293506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067d9ba320418368f471f09578819dd446af5879fec08f8294002c53e7c75248. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU5950110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e08479e5554b55cdbbb36f0f820d3f6bcd590946f5e2d7b1f0e847540f34801. 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/QZDA81859582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c3ca7cbca7d7ec9dfefd6c51074e7fa72354fa47ed7c1c0862292f4b0d0ce0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB2LD1700420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1c09eb598837faaf9bbcdb03009766df50d8d9ab209e51a70be0fff1a78c79. 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/GBSMU3314045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d5bc65def0543daa2495c7a494f69893977b1e5ae9017bf49e974b030bf0d3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMPKX1759043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5196eedf1df7ce0fa087f3513b5eea436fa179b82161c6bc18e568c9995a8e92. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QMPKX1711841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb83515779e6cdac8107373e9d3cdcfebcb83bd0f2ecd073e9633bf50b2e157. 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/GBSMU2824607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cbe83c840e912ee26d8247522cba183d31c584dd8b348dbfd61b79be80eb66. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA6D22200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fb74cc3068bce46d952dc609597354e57025eccdc5e4df402aa360a691be3d. 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/CA6D22200443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82ec839235182aa9e3f2ab289f004c11a4cfe7124c113b1bd5a09782effac70. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB2LD2110013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b886fa220e0da2d4186543de1488bf357c7db540717793ce6cc78782788187. 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/NLE712300576.