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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7ed35cd3bd6ad9c32739cd21f2af22f3cadef1e11d0ff69c84d4a4fd3e9d45. 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/0cbf7e0e-2d38-4ecf-8631-bcc83312685d.json and https://artists.proofprofile.net/proofs/artist/0cbf7e0e-2d38-4ecf-8631-bcc83312685d.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a58ed2d854de2b40cb2d3d1052e37238cc33db59e5071038729f9a128cc4ea. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ITK201700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f08425580d0401d8ce77fae7e5da4b8f9174036ff02e47b589427018ac9f947. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/ITK201700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa508599a4d8f228920f8c6b228ae707625a8593725516dc6c00a3bdfcb191516. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ITK201700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd662dcefe89920c00584dddd988e0a4403f9074cb8974cb6e1b556c11b7e97. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/ITK201700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23bbaf8d5c939c9c1acbcfadac8bb27edee4a3a3dd5ad52ebcc52bcfc2394c3. 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/ITK201700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc734bb633b7cfa354d009cb092ff829d9ab807845dff7be544de45ea48c2777. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:01:23Z), 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/ITK201700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3a2ec55c7cb8fb7421acf4b3eb3d5d9722b0aead9ae853a015ea6ed2d7abfb. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/ITK201700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4e1e85aa709590a7c46d26035c120d86541f0ce79a89f72470f28331b3f724. 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/ITK201700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296ab5eee0f084faf66dd4a78fc039149348b028cd40bfd22c3749e56673be67. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:54:32Z), 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/ITK201300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c4809afb47cd2061832e32fa5d73a102e6bcfd6bfc01eb9fb94bab9789e5c8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ITK201300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dcda0091d5d871b6af048a312cc2d8f04e8b08c012e39c74386d951ac7dea6. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/ITK201300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa713370d78f2e31a1316ae393e938c1333be0293bfd1a67f447cc97d1f6c7766. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ITK201300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324fd3218c32cf0530f727def5ba559aaf3ef8c2742ee2939fdcf322bec716b1. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ITK201300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3038c3abfb97ab7e1c9a7f8e39a9757cfad4008db588ce42197ce9124109b254. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:43:55Z), 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/ITK201300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fefd2d6fd3fcd5832f1180d91e97a034a4a3eb6f7ace5fa1cbcd667d72babd3. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/ITK200600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35a1d86fc32751a1fd30bd570e73cc51b69ce9b6c0c984586237da02d145ec6. 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/ITK200600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa449a169e056011164e53878c55965fef62810bd17f57aa2dc7fdb6b7178d0. 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/ITK200600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c2d1232f1ad8638db3e859cf3bbf577473f0ec70bc804acff223836ee48946. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:34:00Z), 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/ITK200600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e40b3165e1a33959317c2ee76f9b3a83298cd2fa4da779382f3359ff1cca01. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:09:16Z), 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/ITK200600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111495e4ef2eda4372acb0ac005c25cef5d6c5e590a60a6666e67478203f2d91. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ITK200600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf09e0b048fdd045871b75dd2e74e5c88eb47373f3ce706794ce86b0113f6fe. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/ITK200900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8dc031ab72b55ce3f8d6e1b4519a093fc64440ab95bad24ea23c10482f00473. 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/ITK200900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a2a527a0213e00574bc375911a92c6750d502d6f977a8c99cca170d78b5afe. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:04:55Z), 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/ITK200900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af537624d0a6fb7b92c1aa9c3de0705f93a37d9913e552b616e2ec77d711eae. 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/ITK200900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbeafbf843a0dca44c2fb7e428e85061a7d3769ab8ef8d454af8ff588683b92. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:08:59Z), 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/ITK200900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b646c1dc586292ad2ea90ebaed9aa8988a271f86748cacdf944c4f1de359ec. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ITK200900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a7fe8a40bc30b98eef0eb1336a457ad3ff3948d955b606011bb1d1cf346bb7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ITK200900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50bbcb60e5a6908aa0afe1a00f3d091005f9599034f35f29de583bf48756e00. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:50:06Z), 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/ITK200900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e64bfb3f331f1a30bde98bad86a92124e977f48d90c720508894fbb9b07fc15. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:32:20Z), 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/ITK201900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9f20d5c0bc0b29cdb0e05391c56c28c545347e05c036a4fc7afef0fa2eedfc. 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/ITK201900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d081dace91fe29f5c68c7a100dc1d704c0cfe32848fe7f273fd0da96eb82442. 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/ITK201900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402e519d67175c76329680abad966ee098cb748f6ca1aec54305e2a71a2cb689. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ITK201900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f05dedc5b156a24d01ab43a2238f44e6270d360e7e39e7091453c26d981f6d8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ITK201900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a3a44df49fdb3488abda16173cd71bb6b452cef867894639f9cb1942840fb9. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/ITK201900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8026efbf8f65dc68f60dc15a712ab6f79433d74093db59e6d98824315383ad8c. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/ITK202100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1956407aa1b2869eac9fbf4476e7fb6030fd70bfa5ce1af362acc75483bfd4b3. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:34:52Z), 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/ITK202100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402e519d67175c76329680abad966ee098cb748f6ca1aec54305e2a71a2cb689. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ITK201900007.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0db9682f2d4740a2a057af81b4c08b116847caa3ecd43dd449d850e80be851f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ITK202100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef26cefefa5d426354f0947f2218cea47635cd179a908106b30807ea3f69bc1. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/ITK202100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab8491ef40eac62fdac2b277063fcadf4f3cfcd6be074d4d0f73e54c30ecbd8. 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/ITK202100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52fff2541d8f5d273b01768cf476e0022b114048b1987ad412504e224273fda. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/ITK202100007.