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 0xf2cd58fa5bcd81af5ee4198b874fa2127b4864e165c080c55a841dc2ba87fb35. 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/316db40f-c0f1-4ff2-82e6-8444ff339b1e.json and https://artists.proofprofile.net/proofs/artist/316db40f-c0f1-4ff2-82e6-8444ff339b1e.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 0x3c48599d6ea8d7fe78ea39d8b67652442e1c834683ed3d074286889159603299. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/TR3431801320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9065ff23aa20551ed34d4ddb0ed74a00df6da8f40ef1e35773f50a384a3dea14. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/TR3431801323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321aecfd1b4ce0a1f324a6697d8f63257a844ac5280a0921098462d0a5d9d466. 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/QM6P41915725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ac9712fd8a7554e557fe7e1a9b8f063a90edaaef436f48fbc5944ad527ac93. 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/QM6P41915726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb39adbdb22446ac88176bd6a96729fa4f28a27eabd160cc00e2d080142c6e6a. 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/QM6P41915727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc2397eca449c77ffa2a2b67454cd5456bcca056e8ac24952f224e90d4913ec. 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/QM6P41915729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6d86cf059b42f0e47927b7b9e7333c9e54fbad6f8afffa4fb9bc29c9aa4e70. 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/QM6P41915728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab72502f12caa5772c18244c4f5e289cf4decde6e18216b2d4938ca7736b32e. 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/QM6P41915730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71374557f0a053218372c24fdeb2735f1653966646c242f1ffc58328e8d875e. 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/QM6P41915731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ff1d7bba3fc2b86f807f24cae2b67a894ee9bd074d8b4feeef6be71c911409. 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/QM6P41915734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70094bd8231a6ee881420de6dd9c0dabcee19f721c2089be85fe69018d309d4. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QM6P41999687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7be330dbc6c6fc221570698ac5c6c2271f893cc4d9515064d01f4644a06ec2d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMBZ91935528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8425e18904203eb342b1d84c65f437acd1e7961be3ca761be271ce007bd89d72. 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/TRUM72100139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc44bb7f4b0e754f51c74591a23f81094662a69488657845f0810fd5a98202e. 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/TRUM72200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8425e18904203eb342b1d84c65f437acd1e7961be3ca761be271ce007bd89d72. 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/TRUM72100139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df7321f000c5855c5aba9bc5d122d9ba102e87e429563ed985845e447ed66a9. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:30:18Z), 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/TRUM72200797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201eb3045d5a5fd47e7b47f1edbb8514642ea3c9d5cc519b5c9fb271cd45303c. 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/QMFMG2374045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd0f3b5bf12ad9d0c57347666c55dae20bd512350c3b1de44d8fc5bf23315b0. 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/QM4TX2425794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201eb3045d5a5fd47e7b47f1edbb8514642ea3c9d5cc519b5c9fb271cd45303c. 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/QMFMG2374045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4503771ab79ed83bc3d86061758d3427bb2353cbb10342fb79c104104d695c16. 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/QM6MZ2425461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4922447437967fe23114eda2cd68840926c93d137ef65d996db10f1440cb6051. 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/QM6MZ2425466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd0f3b5bf12ad9d0c57347666c55dae20bd512350c3b1de44d8fc5bf23315b0. 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/QM4TX2425794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613c9f4981b473b1e32ed440b27cd022acee99d5b6beb11a09c21243df7c19ce. 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/QM7282582604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15d17deb35e5bbc24bfb4cc5c93629b7bedf9c6931d283d0eb4899b0c1a81d8. 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/QM7282582605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b175eb06955130c8ce65444a8b0b63968747f9250900e2259572811b940514b. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QM7282582608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ebf2b05583842ce9d2369dfc9fa9814ae2e01ebf40db471106be3a869ea728. 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/QM7282582609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23df5d94ec24dd182229480c66b90843b6c8c5c1ef8362eb6da597d762bcfea9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM7282582611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695b91f94be4b70f08abcced1817fd1c3b8dee7d2bdb6487a4ce511eb8eb77a2. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:35:39Z), 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/QM7282582612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de8e2f902b84fdf1e70eb8595d6e4e819bfbab44dea0d674d2c894dfab9a0aa. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QM7282582613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5864b0ac1746afe888cfb0a686c2f43fc95c9e4e6916729735fe0ca14bf25395. 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/QM7282582614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0a84a07a84241fbc057500bf2df316e332035c5d6973ae80411cb8119493d0. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QM7282582615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a99b9ed2c38fa954a69e79530d84e03eee7324b937a9a63bdde5e2ba897aa2. 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/QM7282582618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1ae586f24bedd72fc2bd90a733e75014250541cb907a669afd6ed844927faf. 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/QM7282582619.