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 0xfb8dd0ef4ae4cf3420c859701bcedcc1985e1601d70b9ec87b18fd491ca1de01. 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/a58740e2-dfbd-4bd4-adef-b65d2278d06a.json and https://artists.proofprofile.net/proofs/artist/a58740e2-dfbd-4bd4-adef-b65d2278d06a.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 0x7ad65e7ab83e246cefc835b7bb9ac44f81de01f60a608cac85653f38ce66cdf5. 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/GBKQU2216339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4285a0665bb35c7c47a9a789171f376e1a510fc5a4c8f7717e6be2d1aeffd04e. 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/GBKQU2216340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f848108f66b4a35cab1e3d780b427ae658d63d06ef072d4520a6887a03045c. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/NLXV51300850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fcc4a9e37512a3d4c521ab005ca1b7c215fb023299964134159e60e22c4e79. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZYXP2362195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb79bcc88e5da7e2787229074065dc292d6e7d241ebbe7a21bfdf21379b69d78. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NLG3N2300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1944456242c4af94fe38af96871e60c53a696071d3841b32afd378b65b451f23. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BEIW12300391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ea74cd0bcd3bfa432b1b06e833184c84b22ada970358123d8ce86c305afad3. 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/GBKQU2355306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2482231b8ba1ae4bca7e4ed6226c8a3722051d24a8b27fff0602fcb771f3cd28. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBKQU2345482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd7e2b900c836e7b8ccb19611633ad02b4b33277e1a5cb3d766b40f97d46a00. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/NL1ZN2302235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5b182d1c3b9b05141110100aca7b18dd7877d4462de8200ef2f95e9008f75d. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USLD91745402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c4590691a4a0453cbb06ccbdf6ae8f581b8d15a10544b7e44c96a9a1fded8a. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USLD91744994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffab9ac32827b210beebdc806ad1de1677262aea7802cc80dae8a54d7190a891. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNW72203026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0895e17d957abc3d01f93bb0e2eee2161524dd1d462aa265ef5b4957831b3fa0. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NL1ZN2201910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc240d8b23595a3b26a79b1f776a37066a8842ab8dae7940225d7fba41386f73d. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/NL1ZN2201911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dab1db1263d1ba4f7947ccb27cd0c1cc048973976d06b7e164e604c160b0c05. 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/GBLV62202732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3265544eb2b6badae70638bed3d7aec39974f757a1d9e18112b9a93a1300a101. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/NLXS82200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6c6714b64f51f6be9b3c1ea329243dcb26489aa2cf867cd60898864d0d3a10. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/USLD91739665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf6fb9010244c6220eceb883152b41b50741a776f235c6307d97abca0ddbc9f. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/NLZ542200857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277d6718c7ebf69ace7aa44606cf885c1a87d7f1f1604a312567254398f40376. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/USLD91738063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee131901d03f916f4d2273231dd1e76f399e7b29c3fff2f1f3a914db5a7590fc. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BEIW12200272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd226c19d18ba7ae2a0fb31ee840c6c166d9e5c7a5b32771b93994424e3193fc2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN52239870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0926c7fef8da230ca87f6215dc5ea2592efb3c5166f530f9f1dbbe9f7fe05e3a. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USLQ22180405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7ed7fce9db40ceaea6599777ab2576905d6f16d33790bde78493fd453b7546. 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/GBKQU2239489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1897b9dcdad646b798a1fbd47ad7c63998dc7143e8117e0e2fd20bb82b338943. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/NLZ8W2200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9dcadf0803aad7ef8aadbea6c8a58044cbec11dc9bcb56006cd47e6625710e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USLQ22180394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0844980eefa07eb2e177e4cf2f94039d499dc8c3a0ea5ab0c0f89f84c6f9e7f1. 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/GBKQU2209407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6995f76b413c911a67963a2c5c3da99d388b4ddbcb28a8e5196d574d9094a06. 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/USLD91735975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95dd4d15b807514e332321ea8effaf320c1f9867f79ef3b969fa238400f09778. 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/USA2P2513776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8340211b019e9d76a28c25a8568e4d5185a7c9b9183afb5aa393a6598587cda5. 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/USLQ22107449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264def43bf180302bd0e002c34eebc92d5b1931a07d8e11e2dbfcbf3a8720786. 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/GBKQU2503913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bcedaba45a37f34c6ef773b1b532839f278007738f903453615fec382f388e. 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/USLQ22107402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec5deabd598ab61915849dfb551157ae905acd0252ed6710fb34aa59be55535. 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/GBKQU2490194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f00fdb58d4a150dd7aba917651c0d06cabb64b880a85d6faf3e13b38bc264c2. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USA2P2438286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601958345711f1c40bed84d283966026352f53717fd31412695e24477dc577ee. 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/GBKQU2441508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e23eec5ead7af20912fd0ec565dbfcef59320f7cbcb3463831937fcc30a8ab0. 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/GBKQU2434253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4425d940b686303511162df4299a74d8a34e98ef7cb9e4da1f578d07a48ccb. 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/QZES82471780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7274512919cabb4aa0591e5378f442c9f77738712b4bacd7f9fc1e0430bf1c4c. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/BEIW12400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5405f015e6267551684be72f5c3a5a33df22bd1aeb3d4de5b8cbc83268d4a742. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDA52421424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb7714f4bff1de8e072d0750d0c6873f85e4f727b867d6f4de4c562667d37a8. 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/GBKQU2403494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f20fd52b4c6867ac1577fc2390a511131019081f40f61b2d91a35a38b1e013b. 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/GBKQU2402338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4d2946d6b3baf728a39fd920294ef337a62cd4a69ede2c64209020f368f5b4. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CA5KR2319728.