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 0x2b88d96f841cae8f8868a8515e050567fab4b379bb424230def3b6f06d7defbe. 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/8910a5c4-35ec-44e3-a5ba-7c2fe303aa69.json and https://artists.proofprofile.net/proofs/artist/8910a5c4-35ec-44e3-a5ba-7c2fe303aa69.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 0x19fdc7b2b7ed56ef2e22b12f1f5adb4fb7004c5bec649251e8695fd21f296d9f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN31966859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbb69d24bc1ea4414c687a37158989fbd5b834c0410107c501d5e214e3247bc. 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/QZHN31966862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677062a52be4db369dc6b22c1cec3abc1411797fb0c2ad5c2bee76d9289ef1e0. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T21:01:09Z), 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/QZHN31966863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e15bc9d89ab05e055bbcde26e07a14c4e0059166677a372ebee7fcdf5aaa86e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN31966865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc8d04d6d0b95d6eaa7e336f37f113915b151067c09b3905f5cfa29974057e3. 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/QZHN31966868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6ee40138bf8b8712b5a2ea8a3d053fc24f75db90c435faef5bad325331eb56. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHNA1970657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbf7c294c6f1a81a1a301779150b742a54992779126675eef6b445f325f67c8. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZFZ52084235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728b8a26cc7b8eb460296195d9f493d981b9a663e9750471e698c15e209e1490. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZDA52078380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c32e03c54f93f0f444f62c0508ccefcae27b588a62c09570a1f34492899478. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZES52076020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac25f606354fc6978030423b16604120edb94a42e71a326ce29a49085533f78. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES52076022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a9487a64c73c887848e6ed471368fa2c66ee6f6782da8ea688f7123e372a4d. 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/QZES52076025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39668e625bca2de716df50f6b12f77694e18cf3f92373b553b071cf94166d1d2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES52076026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476ae919430ea44da9238a73f222b2bfda12a63644da5de8eff476c106ae7260. 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/QZES52076027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6531c0e1c4d15dc033590c803982f60cd9fd6305f8fef2b479651350d5ceafbe. 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/QZK6H2028301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048e289a41040326ef3fb97b5a9063ff82e91ed537d36a7615d203557b50ebae. 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/QZK6F2028529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5170793f2029c2e8e6d7a95aad6b7d45242c24c606f9f9c21d430f2093ec5bbd. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZMEN2092823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7519a0465952c06df9dfe2f35cffc937d167d61b84f1a2111d594aa0222f88d5. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNWX2020589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa227315f76cbc20af95aaeb135482bb6c67bf4680ba9bb7d1764e7d451a0772f. 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/QZNWX2020590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2dcb5687081ddcda1decbf4fd90aca2b620f38d74799eba8fb10412e8d5899. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:13:45Z), 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/QZNWX2020591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169a9b9c905b7bce94e8d7274dc219f55120b0678e48d1f831d63e6a844929c7. 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/QZNWX2020592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb080eb6c209ebae0b4494b9f4197ea5f0911f0c861aa322e9ff803d5903a843. 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/QZNWX2020594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d332359d200a5f922e7081d86c935dae539d67ff9c1645dfc926327ba723fd9. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:46:31Z), 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/QZNWX2020595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ab5f8f2ca8dc62a9e905c15d37d39145f62f42b52ec0a9abb702c74d021f1b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWX2020596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd56b791922c1e1840aedb2760181eaaa3f7f404d2a28eb7e1a5c08a658122d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZMEN2186837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29243b09b4237864ca302c23df9528afdac8bd93c98af6b1c12f45f7826f52a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:52:12Z), 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/QZNWX2145699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab409fc30b26690826d354787637038f9936ecc6cad1e8c6abf87264edcbe1d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:32:09Z), 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/QZES52281527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2913ee06437cd36283be5892fbe73a1402d757dfe817cb0d808252fda7702bea. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:33:38Z), 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/QZK6K2253186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f0fa982ecea1348c595c8311cdfab224a51b4ab13d3f29c82ed8c188962edb. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNWQ2251330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b9ca3c2dd087194a8dd49f5500c3e99333889f501d8fdb4a9190ba053bdfc1. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZNWU2237873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacaf49e8150b8fa0423605007a0e9e4e431830e703a2f0813f875f1c5871523. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNWY2292438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83fe4f10c6299c5603e6bd27edeef7dfbf03482093178490d9fad7b4a115b5e. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:55:58Z), 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/QZTAW2228300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e64211d1c92618fcef348419724e227b12f170695a0323493689ef32e0e440. 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/QZFYZ2380622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742e90af581304ef294ea89469934604d0627f3ddf55b062828a7e7c3cbabb2e. 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/QZHN92324513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d55ac5c17161b3bf63548291b75b3abee00e785d18126281c4e38289dfd1026. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMEM2495116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287e759273d0131353b04c97ecdafa1c14776b603e87d6288cc9a4f7410a743a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNWU2496189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9369767fe9ed6b3a8775620fee7c87d9d07444b37afa68a7b2404c387cee5b. 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/QZWFQ2494390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920517c8b5e1fe985c6efcefaa335f5a7d8248d4bc5bd6d5a932061928c9f514. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNWZ2552651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72835af43bc82b03997fc5801a0ed04a73858193205b2172321860f64fc27ca7. 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/QZNJV2010135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b87c5836e90109e07eaeef5801a4cfc14c6ca0b7fa2380e204362245b28d1a2. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/SE6SA2225995.