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 0xd18f076ef612a78962f0e224de26d685f1feeaaadfc818231183ecb9ed131f09. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48857fa9-098d-44a9-a36d-7981897671a2.json and https://artists.proofprofile.net/proofs/artist/48857fa9-098d-44a9-a36d-7981897671a2.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 0x5d43075ccf33a901c30d3a7347776a05c94f04f62f43bc465fb2b3225f64d766. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZK6K2437994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89dffe7d40b8c9e87731ea47b92f790fd9d5bb7485c409ad1c0a843ea1e6d84. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZK6K2438010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf505a832cb68d20238287a2952cf866b001d622fc0e9ed03c7b37384d98a0d. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QZK6J2464128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1170ffd2997ae0b79675adcc062357cc077d309763a8c2ffac11df7de1ab05ef. 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/QZTAX2415776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed9ab39f8fa2e009599d751472421a58302fb07b4512c1d2d3d0f72f331f896. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/CBEYJ2456707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f18693e495bcc94ef754ce74a20a47af9b651a7df3d044077fd0dfdef16d469. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/CALVP2491348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7879989303adec288c048e9b152f457de2ff0ba51e350ff4d00f1aeed1d03590. 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/CBEYJ2429149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb384109d15721a6acccd26c10d5d97d304ba4f0e5e34c6de1cbb4bb194b1ef. 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/CBEYJ2456718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226f69557872690c8cddb5f0ef69241d736b1a261a81a8d55a49d41123f790d6. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/CBEYJ2456719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf703466193813c6e49b1aa99a815fc68f08d8a2b9b3318e7afeb7d69aebcb1. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/CBEYJ2456722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed337451fb43c52a5189729a23286301542ea179a7b51bc5d3a96e9c329591f. 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/CBEYJ2456723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaac5dd946c31937cbf4b3856271803313784643735bf9800bda879935b32980. 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/CBEYJ2456725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06adeb4589f400a41e93d605f7150f015aca1c8cb6df5584692d31561411c9e. 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/CBEYJ2456726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f94908c45846b7a9351b7223009f6d8a7d199e3f1f1ad85deb505bf246cb8bb. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/CBEYJ2456727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d57c955e451fe8cd084e55c0c02c6ca1fd69b82959fc58c1e6dbcc545cff0fc. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/CBEYJ2456728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bb45b81c7dbba7acfd9cdfef16aa6314c198bb3e5572b8a6d11d1945bbb39b. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/CBEYJ2456729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c75e95717e963792c9496c5c1c131b81bd8771a28537672ebb376f469ae0ea. 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/CBEYJ2456730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88dad7c08cf053ff830a84f7a298f9f14ac32f6d92d20b99a9ee674a528ba9a. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/CBEYJ2456731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad63a10fdce1974e2abfb7a802d9197b1a77adf4228b415dcd54d278af8478c5. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/CBEYJ2456732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e48b3f36f1f348e8eb8343a2de143b2fd4a518154a2aebfd6dcb93418e64e8. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/CAHQJ2521165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1704ab1de154050bca3f94177f064530cb9c8d2e8d370af889f54ce31b64ab8b. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/CAHQJ2533059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7464b08fc9179a3a7424e5ff14f4c691fef9d04622ef11df563154a753b9fd. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CAHQJ2533060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd40c99a865d71e30a95f0ddd605580b46c9a7b22105da6b00e9e89c8b0c4aa. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/CBEYJ2477649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521d0b19d216dc2f3aba57b70c6b75bdc4f3fccfab8579a2d94843b95ece3e7e. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/CBF8B2414555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd922ec24c0e70c72602b227b58fd0d48a4f1ce57b095e3f4c4245c46308c6f2a. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/CBEYJ2490561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa693c9cc4e5e268931597a08be515c731e68bc9d38d69b58ae56a543ce34a44a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/CAHQJ2533062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db2272a77407c957cadd0212ad32d97cb64341dbe3b934fb67816d52b176e75. 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/CAHQJ2533065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3c53954bbfadfeb5b50a613b9887042537410d399515c812eb953f2d10cbb4. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/CACWV2564762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59450bfe78cbd3643bef1439d47cde9d7926970c67d45fc5e3adf7dffdefa28. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/CAENV2503513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea938cf61b29b30494ad120613f7aa58c3bf6e3edfb2a1634a43daaa3e355762. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/CAENV2528332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be706e9c2b305c5d05b998dc5a828d56358ce991a5744e9cf369b129f0a120a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/CAENV2528339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15dd8be0988a37d6932fd4a842e85d12b9b6f230979a68cab01f85213021bd0. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/CAENV2528341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea12e5804e7859ebfbd3bca408ae9dc314707e70c940aa9d92ccdb50d0a5aa3. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/CALVP2532108.