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 0xd7157917b59d26f12789e059d31b11021cfba57f936633e3511f03a50daebe67. 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/e15cd601-aa50-4f1f-a06c-46351193ca79.json and https://artists.proofprofile.net/proofs/artist/e15cd601-aa50-4f1f-a06c-46351193ca79.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 0xa6bf8eb4e204056d70c0dcd69b686ade3ade6b066d34daa8cc3dfbb199937204. 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/GBLLT2143358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14a4418ae5e70810620f38d826c955f2b9f37e47daee3cdfd1ad77285d71d90. 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/GBLLT2143359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c24ca06b7646454f509531a9dce6b5d1d3410a981883423dd65f4727300c688. 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/GBLLT2143360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ab65914cebe2329dfc469c3fdde74c85cae5ea0cb5bfd51f1d8fd6dfdf0496. 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/GBLLT2143361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c7c5368f5c97bc79fee893b760646f6a40e250b8eae802b375c1f39628a2e5. 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/GBLLT2143362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd538130ce0f3a1c393025d4e8d0bb99c16d7f994247cfb70ea7711a8ba9a29e2. 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/GBLLT2143363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d438834edd84b87965f808b39788d91e4ffd810bc5168a258f712bb1f381e3. 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/GBLLT2143364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633db23e8914835b9f0e4540f293759233b2d4e531d90bb9f3dc2b865dd2e413. 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/GBLLT2143365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f647f2f36a7d1c9aebc5e01d90d8d34dc7c058696e47258482859d34ae135d1. 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/GBLLT2143366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8e610a9cc1d2907b1fd30c0fff147a5f0868a370f0db7c18e5a4608517bd9c. 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/GBLLT2143367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9ce6a17aabb8afd05d091403dea9f58ddc7601d0c492c2ad2e65a0e517e891. 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/GBLLT2143368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddaa130cb3aff08a88445b330cbd35e6a75cbb24cd2b00c7d16a1c98daa9327. 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/GBLLT2143369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554115db213aa782744a6912a355e59ca33a9e95ea77183006197fe05e5f0c46. 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/GBLLT2008189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7053428525879a9d18013f17c1cb041fb220212d542fbae5ff3ce016871c105. 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/GBMA22065670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe961fb627913137dca4d5e2e616322119bb6356fa830eb835050b2e0ec7405c7. 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/GBMA21879001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a625b97c19d2c2a7fa1ed0f74600825ee7f51559c92e8dd05196ebf4238a6e4. 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/GBMA21879023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd849ec3ad20bbfcf4aa3e79d7c73b795117d47dd00d2c8080a992f02c12e2765. 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/GBLFP1860058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ff57776f09f1e4a20812f63b77ba4bc8279bd281491d0c3003cc31b67621a6. 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/GBLFP1723804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f60897553d020c8115083bc30ebe07f4088cc852e37e4aa1cda94b7064b71f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:39:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK4UL1568002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38256f15b81a493757da562ab5a431bf119e76d0c97370253b34b9b8625726a3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UK4UL1568009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82c245abee5aedacbac1aa7252891656703ec19554497fe13846d234a254105. 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/UK4UL1465004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288db90e4d491645ee4750c9a89c3d3cb4c19aace60d3f376c0547187e49e668. 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/UK4UL1465006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27290df42705f0c9277e4c2bdb621e54c6ec014d2e8fdb4158ca5caa1b4b1d01. 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/UK4UL1465009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e213429214597997c4526bc1f2c003f2fa68ecca84ebb3fb3dc8a725d03a682. 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/UK4UL1465011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd887bef4f6fec2d56396f25e371e2289d161a31919b257de9ccccf8eaf5384. 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/UK4UL1520010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570be7063f0632be784893110c34861afb56e865584994a2b9123af2aef13260. 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/UK4UL1536002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c27337eb3044144d2c326084e3aa99631d154aff86b6efe3dc6086988336b4f. 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/UK4UL1555001.