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 0xeca7daba487f8b9825478d6bd0798141e9d69cdb8e134dd29c293dc18d0933e7. 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/5958f0ef-fa78-4cbc-8621-c075a077a1e2.json and https://artists.proofprofile.net/proofs/artist/5958f0ef-fa78-4cbc-8621-c075a077a1e2.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 0x5b338a93d31de1986067c62d6c60fedecf43b89eb887a19e0a4ec7d1c3366a6f. 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/ES79A1375003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412c5112b456495093204e392cf09a9d5917a19c6676a3f97b64b4d915cfc351. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ES79A1408408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141af25ae8af2136794c1671b63860aeb7b7c906e2b79e0587c967cbb206757a. 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/ES79A1408409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc8a63415a2238a08fa3f05433d3bcd69e5aa34a67ef736beb0dd51d111278e. 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/ES79A1610201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9b946a08d948c33c821baba153f763a8c4f789aa3da4e649fbd8b7909dfb0f. 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/ES79A1610202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2709d6d986967cc08732dec44d32a6ac6d97fc04057ad3dd369d680b0c967f49. 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/ES79A1610205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdbc878eca2418e419dec9b334584f541a97a9c65153144650e93bd5bec7656. 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/ES79A1610208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cb66165f935870820c708c6472e443dda5447ccada69f6fe0a934a28e921c5. 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/ES79A1610209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e01a4131d88b3b4f5ad421f686d49e0f5aed0477ab73ca87a90e5f78ac3795. 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/ES79A1610211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9438ec240efa04be8b8d1572ff5c6de7e66b5d373c933ef2fefb6a101da9a00f. 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/ES79A1812708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d57bde69244459199bfc623fbc87dafca70406c30dce1528c9dec52a748fedd. 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/ES79A1812703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c1a4b127d0f431bcb62723ce9dfa9b24d322ba4b5f23b8c98979d5cf7a9f89. 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/ES79A1812709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b9c7f44344d543973c0def000965ec11876baf59087257222ccbd4f0435759. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/ES79A1812710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662721d402a74fa5508456a08dc964a725e22f0ecc29c30a0edcc1d7e04bf3c3. 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/ES79A1812701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89dfec5e01ac17333f801e91707de1fc7bbe34d058a3ab11169895dda1dc475f. 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/ES79A1812712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3556757f92236206824ce9beb9abbd452f93b298366e90f7f325dc838aabea8b. 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/ES79A1812702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b768024a00cad62a26ec9468688a587269fa4b06f533a9287b258e951d7f82. 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/ES79A1812704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c817d0df29ba196ad6f11a5e7b5306390eb745107fe693c513c80e82e75de1. 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/ES79A1812706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286398c3a9a8ccd27043c905fc43db6a4a7b0fb23f64b39c0c40341603b7b323. 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/ES79A1913702.
Tierras de Aquí, Tierras de Allí - Sesión en Tuetano Estudio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ebee96d2b1c2c99f977e8e0b93c1eb36fee290978e5a50a9b1f8adc0da3356. 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/ES79A1812713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8c9d692580846e18d3d0d5bbb6668c5b283ec1569c58d61bc1c80d5d256d26. 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/ES79A1913705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f236e4ecdbe978b55a768382ffd26535c99cd5e97fefa91989ffbeefd14f190. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/ES79A1913707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13b69d34747df27800ff61ec3ecb63403ec233d9add567c8a7d1e0fbed3389a. 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/ES71G2056354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3695e5d610146da6c0ad54e97c25697441f0e9c8945ffa11f8becf689b1d253. 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/ES71G2056352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e42aa2012b815e641f3ce8ac11befb0fc758cace796c70ceaa8173363e4603. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/ES71G2056344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f386d829de554798dc80caf23306d2508501ee42c0a239edb8150e1db9322a. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:38:00Z), 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/ES71G2056345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b3d87290dd5b8f4c42557552e45e2b27c83daa874b2000db543ebd0a60c7b3. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ES71G2056347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb66ffa6f9efac10995eeb59bcac2b7adb37f8ba60cbf08025256e0887a0100. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES71G2056349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08defd6bde2331aaa9af5014c7d19738fdf9afab8b65c969cac27ecab687c776. 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/ES71G2056351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bb50fce00ffbdf7679761c0d9be186f987d00edff9538d095ee94805010d36. 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/ES71G2338237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa194502d329540e58bc87c92b82251b866081095907519822d41c3e6d9120d90. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:11:24Z), 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/ES71G2338238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1461c0068b34d58855d897228dc3f6e8ed240ea5ac5d4444485f34126b8ea6ab. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/ES71G2338239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bb50fce00ffbdf7679761c0d9be186f987d00edff9538d095ee94805010d36. 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/ES71G2338237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f95cffb43c07d3015889fd85b6ff8cab310ad37e880bd5a6ee70b870c786f3. 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/ES71G2338240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7823f56736a7ca1da561cf8926bc6ce21bfc50247776042e4a53e8ac1ae2838. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/ES71G2338243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2964207feaee34201cdfbe1163f6f5811216a3533c80ab3fa791c769d0ac9cfd. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ES71G2338244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0687d3087a1f99dde5b3143290c3d1769975ade81ecc84f441cf6435da42d8. 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/ES71G2424942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1169e62fde8f63febd3597cf902a98d512e50d7fb10840b7200f67b44338796f. 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/ES71G2422279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a205e635c8115f8fb565f24886b6a9c173d2d6764cdd05b5352ae2dfa244bc. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ES71G2427638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7722649b860f602ef447932fb0aa8167593687e560cdb0799eb1d8eb5b29320e. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:48:52Z), 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/ES71G2427633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfac1de6e139caf4082cf265b9f459f85cd8b1347988cea6db82fb0e2c5dda1. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:28:36Z), 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/ES71G2427635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3a2e4e608e944f9e16f517a23356df07b9bf4983c5e8d107013bcf6a30b7e0. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QM22L2411357.