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 0x4ef625f791848c4408fbeb2c3e4e6b45cdd770a62d43199899a7eba366ad8ea8. 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/7aa85762-04c6-4a89-9c5b-80c03ef2fce7.json and https://artists.proofprofile.net/proofs/artist/7aa85762-04c6-4a89-9c5b-80c03ef2fce7.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 0x20f17f6a922833367147f4bc740462b8ade7ff2470bfebe5fefb63ee675ea7ce. 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/DGA052415051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d9c26dc6855dcb052c6b4f8a3a69b7f76545cc0102fc83ec11128126692c01. 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/FRX452484271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9310325bc62f1a7355ca62497ea6d658186295995ea2094ac872218b16e9c5. 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/HKG731679198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82fc51916924170bd32e83e0e2e80538737258291f63a8cdd1f9beefd16dee2. 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/FR10S2434522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0a71c1c93948759f17a8c7f162e52cbd6637c5e38f1886e857a710b4acfeae. 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/HKG731684672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4829941e1948a242868d09b3f24c0ffbb9f46438686dbcc8b0f5d7ad3779e3d6. 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/DGA0L2378698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e02581057110747522a04e3c9a3d8f5e03cfdf90cf7e1b3fd92eb242a4acc2. 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/HKG731648747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cdfc9cfd7ef8b595f19580d5a3aa28f404515bee7a51c8f2bfff3a5b3d3107. 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/HKG731682006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889152000742e50a2e06377d14dc4f257fd149974250a8519b01c9be519b84e4. 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/TCAHN2344358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bb9656fb2bf1722c07410bf84809169ce688a82c2a4b1d1759647978dc6211. 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/DGA0H2314597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cc18f2a4a87076abe0c4b1cc48803aa1996fd8ec277530d02f2e8288435c84. 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/DGA092360044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c6b6658469213b82ed82fc5b65ca66c501bfc3a5b05b0933d73ec86f0a5735. 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/DGA082317405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e37e7aa776060676d20763f552496ff4f17514fe0dd01304d75b591ccdf8ba8. 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/DGA052317486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca019243ae1bfbd5ab0a98dd55a1a0ecae5e40bcddcaf50dbd0e2e178e918a9. 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/FRX762362103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2775ccb2c27d3849ca65266e69227754d078889bd297b2ab0ffbd3e3d6203814. 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/FRX282366555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefa764185c2dcdf7f6ad39b1ea951680ce91cf0bb408beebd92b35c030138a8. 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/QZXLZ2326901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867a0c6c53242a44748dd6ce6fad9f83a735825d605931b4abad947bb4bc7151. 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/QZXLZ2326903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5a086be8966c35bcbf52978cfba80779f02e1774e4e493ffa1a3bf528c1522. 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/QZXLZ2326247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1625f22e4f4eab1ebd269cb8d9211fd1710c6b18319083f4ddf8d9218806d75b. 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/FR59R2309323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1844f0baeb240f8458e824f6b0d665f589a39661b182eaa9ee2ffa2736c2b24. 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/FR59R2313949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96ec31fbf19dcb4068f396b1be6cf5b3029792245b72d4796ad8fe4a6205761. 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/FR59R2301394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f9e4bdad7c5aa50070e21c00ef228cb0661afeb078248fe5683960be1a38f3. 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/FR59R2301395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596cf9cfa0897c4bff5b05267eefda2c8d9cc458cb0f27bbc5bf319065cd5983. 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/QZXLZ2326249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b93fbc68f32e012b94ec59516f35c98aa9a85b30f7c7bcef80a1b31b99f45fb. 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/SE57V2354301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e3ac9cbbde2f52629e2910ce94e990d2a0c14f37c9618c3344181a586f9cac. 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/QZXLZ2326251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5b4194d129ef1fbcaecaa8372a273a4c778340d2affab3b9ce50409dbefccb. 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/QZXLZ2326252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b99d75f0d8e1ab5a4e633a0174ea0a96e5315a48e87f34c2bc3e6bb831a3a3. 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/QZXLZ2326254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d16fea043177f6d577606a108fcec62ed1873408d26a256364e4a3ffe1a285. 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/HKG732314771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a6993da8853e9c5d219bed095e75ea177dc8b0b589495c1140c9ecbf96cda6. 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/QZXLZ2326256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9670165b900643f2f94d42b498d3c8d0f5cc0a1f4bef14a96026e0877e84fa41. 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/QZXLZ2326258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb15327f6c2c645cff8cf429194024936355535a81ed467d3154cb18561355b. 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/HKG732272295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c69ceca3548c5938887eba4694bdb818bc4af5111b561e4832ffbb2dc81d04f. 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/FRS182124970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea27d9ea41a6a8aed910e3a6c49047deab7f42c6f2623c86d7346f53b1f7dce8. 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/FRX452197240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131a76525e0a110a855123705552264ad62cef717801cad4912100352fe8413a. 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/CNZ632100515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a515db39ac190a5f63bbe292a52c686d29014f67171343f424c3120c91dbf70. 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/HKG732120341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb266383ef44e860858c298a5dbf9f0ba932155127760f1636810a2e9dd14d68. 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/DGA072195103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66db70820f628fa00b2ab814fa89eb949fb2f5a3a3c3dead7cfd15984032dc22. 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/FR10S2177676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adb3f2a3576acac9012ddd5fceff9c0f1bff6990192d5b4b0484bfb61e1313b. 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/HKG732130880.