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 0x8f015a119e7fa535f2af7bd01406c64cf92a762e057923fae4f8b9e9d3722126. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/771fba55-f17b-4abb-afce-c1bf5a03032a.json and https://artists.proofprofile.net/proofs/artist/771fba55-f17b-4abb-afce-c1bf5a03032a.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 0x892667eebde4702f7933abc3ef4b3c1da50e6d56ec68ca92ea54acb3d0b8a07c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZFYZ2553133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7b3776c513c01b0f7618e66adb8cb002889d63a7547800f14630868dc4313e. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZES72588143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6231eadbefac2c8b8dacff64d0ccb7ee4a2e7a6a1c6a9465954b94067db9b5. 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/QZHN32597069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8220f4a1a6da28f510700e2919ee118d0d7c977c91baf32432781e246c02f59. 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/QZHN92517174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262462eafece43a5ea0772daafe21a3572a3fc0561ee00ef9d0810d0ac42af1d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHNB2539972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6701469752cbe88816d0054d4608ba0184e5851ca9a5a21646702c61b427754a. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZK6P2553849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1333910e3ff6b45462f3a4b43e37ce1c8a7f6520b52563a59061ffd7e2be1d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZK6M2592341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bf69e588bf8a01e6ecb4886cb42ee44d92d1fa79a1cab477ba1f428584d05d. 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/QZK6J2585408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf25a0225f9d8937761bb1864a340b8cac4c2ec900f4e18803125ed68638b5a. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/QZK6J2585409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cce81dd54c5fc618da9392af8cc1dc76feaf5169034497add908e445f5fe1e. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZNWZ2525301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c7a4f7241da0c6e0d05e9775db3006e7fb89f0a6ba032839f3cbcd0c0f8fea. 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/QZTAT2564755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd234f5ee66544c33607c3b56381e3ff5ded4462430c486595796f259b372b33. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTAY2544900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5878342b174d21fab82e2c7a71fd91dd09dd714fab4dd17ec34e8b2e81b8c5c. 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/QZTB42546647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc009b01388ad9e2e0186ea6045318f74f793917852d6867d0ad9d061d2f000. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZWFE2566139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8584bc7affd4668e905e909c6b5f58c6718795fe7bc194bcc5ccffa48b4dd5e. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFH2589562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b417a8970aca1c1e0729e2a89a0e3dce9af2d6bab2ce7caa35d0ba3651b51d. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZWFM2533286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d53573829a8e2037f054c968e51112ccc2a25cbfa16fb25d7c2a7f7da8a40d2. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCAJY2527435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72083c078ab7d8fb9bd9030e5d31fe8019426d86c1c7569adf1b3852b7d66c1b. 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/TCAJY2574836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5278d386e6cb51879d92b5c9e73c3411d930dffec91ec0f9d1e58026e50f58f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QT65W2538297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75f913a6a694a98b5bd70183b104429f90ddd0cc58709975293c44e7b38fe47. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QT65W2598260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123dad10124ee1a5cfede783e7954b6fec372a66d8550b224a9b2fb1e820c857. 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/QT65Y2537336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cc8a956036259ed49646bad002cb27376044d41781d1ab436fdbdc0ec94725. 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/QT65Z2582813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98a0bbb9545198a34760983b35bc5f48b93367f5b6eb25c4ae798156392bf71. 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/QT6622572135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe547e9990666e3efd51e795854e16d8ed98cde0d99a4bc5f05bc0147441be498. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QT6632563070.