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 0x53a6dc3b973f020de2031a22ca915b4c820098b38375bff94cf54860b3a61c91. 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/de276bf5-b182-4ab1-9add-364672a75807.json and https://artists.proofprofile.net/proofs/artist/de276bf5-b182-4ab1-9add-364672a75807.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 0xac3b561a75128a004831802d3940b73651bfc352699798c0a4080d1bbe518951. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZ93L2058156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6181f5a69bb4ef3be611dcf6c1a10930a1c76c5edf59a537762275743e62cb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZ93L2057801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a08c8235a0d4806b24acc0156471abaa7c749d2d2abe2c06ea4230ad3ebeb6. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZ93L2058157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b42ae1df65a00bf8d2f1b2630e7549d9c6637772d9173952983ff365fe2da2. 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/QZHZ42043604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d5272e72c968605f5e4c3a7cf0324513a9614dbaf2a94e328d05c183c4b1c2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZ93L2036402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ac1fbf1cda6f625a6f2c03ab4db16a62019ee379806102314d6cec0d13ab49. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZ93L2041142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a9e6d146c64399252456b843a55f8aec509bb9295677ec07a4f235c14d1b26. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZ93L2052104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fd3205a3d0562860501c34bc45949edc6d3f233ad6605c96980e1c5a9c9a64. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZ93L2055875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf5ea2794a99a052b604300028c663cc707821804eeb01772e306d1c9e64c0f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZ93L2057807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ef9daaa8baf89ba11b85770af5df67b8925fe99998c5838700b6ccb4994033. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZ93L2057805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa655b7b878c188651b3ea0df2e63d6bc9111f2e1629f85350cae4901eed6661a. 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/SE59D2116502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d8405353dce92afad37fe6e8a9bd2b525672ee49f7053758d12fde21373a34. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ93L2105339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abb50e9f1db3fde3fefbc8bda80f8b92b4939358d6ebe4e3c89cded318d979e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZ93L2111389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d974ebcf04da6706af74820c40bd17586fccaec9ac998ba160494948396c58. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/SE59D2133501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02f1bc1b376295348f5edeb2758725f58072a863d93038de788734fb56a35e8. 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/SE59D2133502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cb7d22f41964ec32207c57e2af1f657dbce2018148de27549441805a86aa05. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE59D2133503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc029441b7567c2b46d6412dce350cf44ef25fe9f3f4ab945e4a0d38e0caf10a2. 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/SE59D2133506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a3d9aed272ee2f7556f60979df476e1167c45f4623c8001efd68da8f12e5e2. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/SE59D2133507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceeeca5807f2c58234226beb672cf7d37d8108366d5fe6f897ca006f8d188044. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/SE59D2133511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c8e39599d9c0f97e1e1d487c28ef46fdd1ef31c24e64b66d782970a3edfd17. 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/SE59D2133514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dc692a78aa4ead5ad8ea638ac74efa2cf424bfb4e9ad4ccb6819aa1999fede. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/SE59D2133515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae46085f65aa423264e0221135f0790362b50a038de0b22b17f2aef6a0d441f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE59D2161901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa8c478f5d7cbfebee625eeab24e7789e1b75e4a9e106f2204a93273208a784. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZ93L2203198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2570e49bd0f7ed6218c81510c4110f79ddb5a501c4bcfc9d50201dd709aa5142. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/SE59D2212101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004b85dfc735e4cc68ae319251069631c364f04dbce8f9791fd92e65c9962f72. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USDA12200408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9999fad1fe6bf5acb6d92b5a11c3ef9cb1b927aacdaf93f8fe54e3bd5ad4da0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USDA12206253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f758a9ac5a2f61ec8aeb4583508fe1d650a747f21d3c0ca59ba0f294586cbf. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/SE6XY2288711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb1d631395de544af8bf227df83d13ac90872c149bc8307c9a34d63f3f60228. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/SE66N2222020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9a772202e7ee4cbcc57d3075bc4f835318950f3ad2609dc3294d96e0c43aee. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SE66N2271147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167f9baa46fe69cc5ca261cb914a500d2e2dd20a404e1ae5cd9c5852c8398a3f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE59D2269301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d64fd72dc38e35151ba84b8630c8d54f4ced7364b8d88bbe4e99e557852bfd6. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/USDA12304609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcd9c4a818fee66304c098f30cdae36864a30e1d707f9951f7a646027cbaee6. 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/ATAJ12300874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26ff0190e742ba413804f408aad8097218348b0ce9bc5786f7321e059518323. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/ATAJ12301045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f2f08e75142b459c9cb1626beb58b236ac6a1092246f9a331584f9058f799e. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/ATAJ12301412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18e93ed006803534add5e211449e4bfd7a97cb4e118d7c99721eb61464fa067. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/ATAJ12500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae22af5645418729cb6d80958381a28ec54489d1e2041958941474b0d61e0607. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ATAJ12500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebe1345c8268c90827220cc16740adc1325448beb6e1c90a0120ee2ddab1922. 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/ATAJ12500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78632eb8c5345c50d60080a974f62af6da26c3792a089a1a4b70ae840d7e569. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ATAJ12500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd98233dcc9345cd99baabb780b33e953c5f54a77869ff97daf3068df0e9c791. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ATAJ12500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b5c15a2962b820d887a5f7b2d4ca1bbfbeb5e4b30d7df2152f0dafea7fe039. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ATAJ12500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf2c6a9692712d693cf90609f7c1f2928d5782ded602b7f1e4714e82a37bd0e. 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/SE59D2253501.