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 0x4facc428bd672459c26db98f822a991afe3ce746a27d62bb073a5ea283b8b19f. 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/de71c592-2c4a-4b9a-a428-7321e44df7b9.json and https://artists.proofprofile.net/proofs/artist/de71c592-2c4a-4b9a-a428-7321e44df7b9.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 0x67c37faa9ceb6ab9a530ce0dba3144fff978cdf7c998cbcd86ec4bc8d1a6fe8c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR59R2373354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd2baef6f33c8511f543a0212054b9d3e9b0c79b5f99b861e586cc92a6f5192. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/FR59R2373357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d56b0e4514311c376cad9171fa506dacc03464ff617db98142d22b887f01a4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FRX282369816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d670e012b2bb0b55b19e2c5dccb23f8b79e7e6b5d5c462e2e9854bce8cc9bf2. 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/FRX282369818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7537537d44beb641fb1e8269637d7f31bac7ae0d5d34ebef1f55ebb2a5266bee. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/FRX452302525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e180fa200aea1858b97091942fad48db82076b6bfc7162113c0d386725a4345. 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/FRX452302527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e4ea87fba3ddee0998a1604651889efe82629ab43b9d93b2797aa37d34c0e4. 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/FRX452302529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3014239fc7969c3efe73c0556d755b3133a3c37155407a7918df9b2e544842f. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/FRX872303925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95052c48d20b59e2f083e39c57cfe9d01dc0b04b42e4527d379566421828ca32. 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/FRX872303928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57954a9274320822f83be96a6e73e915ed32d391467948745791d035226e5eba. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/FRX872303929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765c4004be5a05d606bd7023f14a7a1bd57f25b9ab7d34b443d5d53de2a1b5a5. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/DGA052300704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca660f3729822ff54149c7590a32f03edca41b34894379d2367d9f3569d66b12. 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/DGA052300705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12974f1126470c16fb83a1fa1911062d5c901ca7bc50da9d6c921635511b4553. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DGA052300711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7242382a77e7592bb6a7e627846c451d6c0a4932947c9b725e768f5c664551. 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/DGA082307474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf523671ff2efecd8007f67b1d1a2eb0b68ea3a26acf554ba1e15564d558a2034. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZZ8B2372482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf304564d70ccab802890ff8b037461282dc703c3bb33a5a20cc72eaaa11fd6d5. 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/QZZ8B2372510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5f468a893719d0b12b3c6e6f34b0548c8562203a744ed5d2ee4d27f90b9b16. 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/QZZ8B2372532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d2b65dff88cff1106fd547f9720f4248e0c365e8b87dc7662f557ab4c7da76. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZZ8B2372863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9465d4ec9db31f1a05d6c43302c4419191a3a520099bd6ae9d9dc5de9ba314b2. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QZZ8B2372758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64774a5ddb8659ab360c73e2f4b186c85a6a45a07e824d5c77d17b601a922d0d. 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/QZZEC2318806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c57ed5e14b86d5672ea09eb83128267efac34a3545237ba2c8e9ceb39bb9c1. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZ5FN2419810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019df92e19b9fff185c338ed40704e740d8ee29162c1eda2acefc88584b00202. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZ5FN2419817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785c37e4fb7b3ea201bd33620328c15efab4908fb84877e6dce9524517cc5fa7. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USLZJ2417384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf640a125597c718e46e04a75f2fe4e7053ac8cf5aa707cb6a5174d301115100d. 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/GBRKQ2449292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec63c2169293225814864ceee14292de1da83d9e1d92b5602d752860af498fa. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBRKQ2449296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa094158f361daaccc2f8296c63b2bf185c000018496a8f60bf053d5a2636f3af. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/GBRKQ2449305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2b36c3f72d5272b9b02e1f404e910cd6ca7fd78d820bf2357775fae72e5b32. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZTV32435836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db2247a07e5979937390c38b0dfecdcf45e09ba61361014adf23bb7a6b5b303. 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/QZWDE2495956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0f24e442d658f83e04b49768eb8e8abaa6e4b57c58a8724c4cabfe11a7177a. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZWDE2495961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeccdd5d808cc6f9617a181477e88a9edaa57ea7a55ea8f6446c8c384791ee0e. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZWV32464827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80baf2b5e937b095aa036ce8b90f1164e7172cef4dcb3984d1a4450d4d9b576a. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZZ8A2411630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3de418dfb83bfe1f92f20b5da956549f16c23c569be4ce888c17a027ead0b9b. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZZ8A2411631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726825a144f27680ea34cb7c529e157f290faadb329c089277012c3fe2f8fbbf. Chain 2 (Bitcoin): anchored in block 958399 (2026-07-17T10:39:51Z), 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/QZZ8A2493276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191e65694d5497f6f957964a23ead797e1ac838fd293070379cdde7c7007b71d. 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/QZZEB2401350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a1ff455dcb882387c1489230bbc3579a111226da011b684e8d9f345f1ddbc0. 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/QZZEB2401351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6c52c57cfeedc186cb84de8be9bc8ef65ef7e6a6334753e6d0ddff113f3cb5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GB8KE2507760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e38a5a84f75c2b23e5b0e2891876bd4ab3c57f6cc57b77a979a85d722383898. 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/GB8KE2514530.