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 0x0d5654229d933027a1a50d6a9ccabd143c450c88e3255f9ed42c7ecc6fb8b10d. 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/6988fb15-d564-44a5-9cb9-b80e001789b6.json and https://artists.proofprofile.net/proofs/artist/6988fb15-d564-44a5-9cb9-b80e001789b6.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 0x33780b9b1137c5bf48bd3feba7c55490d1165837dfc6c6811089e3c4b1882a1b. 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/QZDA52376902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba80541852aa60407adcbfcf3658378e802e09d8057fc27e84d7142d28e2bd7. 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/QZDA52376903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cdbe6a9e1969d057a203b2115620cbeb55acbda1c8ed8ebdba58c4e10a247e. 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/QZDA52376905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7baa0b0ae22ca12d1752c6b06d31ebed7a8da210b1cf8abbdfac1697f0a6e83. 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/QZDA52376907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b36dec797a8362079260f78ba5f935fb36de53c8397c79fe0d41c8b13b8491. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZHNC2268881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21d8c4b1560c7e1b37a30a4279a49b1199b7fd28f16121a431c5dcf8cb5a424. 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/QZFZ42245935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8cb7234feea66c1096e44bdc018a3d56161bd8e6ed668f69a3bc4835270513. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZHNC2268882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867a808f3d352611becc03a3cff68abfb7fc5bb05393438644dcdae7e965c5f5. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZHNC2268883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf581eef68480e70e0650538f7296227dd3a94f9d35d1022da39dc1730431dbe8. 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/QZHNC2246147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9203236c62a90faffd680ca153c82056edda346a04c74a3a6e56a2498e0d020. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZNWR2282862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbc261e3f3d8cca1a57d0608f8d7041405e8da838dd540ad4ccfbb465df6f3a. 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/QZNWR2282868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd274ba635eef55df214a18d7c86b95647d6aa0e47f632df9203905499f2804. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZES92386774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe492182d4946d37fe8f2ab01aee76445fe544ec1355764e213dd1fac4f7b2c66. 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/QZES92386773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3d7119ac8ed3ae3fdfdc8d7a109dd1da1583b0c33838fcf8e31bf0902cf503. 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/QZES92386772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceace2b3536be2b6c2952f716dcf5caad249f631d239e5192ec39eb2aea1214b. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZPLS2356947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf271c1f1c4288832da7ce877993250625395815a42f6b0b6cc9ef1b54033e492. 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/QZES92386777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f8ad50d71c633c95fd613be2ab0b5a109630ce510d6ab0682dfb9d6dffc522. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZPLS2356948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876202cd818a886281cc538889de9b1bac5532e27c951a7a5ac4089e47509028. 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/QZES92386778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6912a263b6f46b065d953a1e8913410332f27ccd7c21356919d541e677669234. 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/QZES92386779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf4830134159e8ab71ff4d8ec7e6420af3cab93b294095b137a3d2f51d74d18. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZNWW2358561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3c4b434607286fafe3f0ea4f79ac49a707ee387a597183012d24ce4946d483. 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/QZNWW2358563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998b9efd22d538d9c22e71c69e74430ddabd322a04a1c872c3ed15f20554ed85. 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/QZNWW2358564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf91a2cab0220f1e5be5e6efac1367e6bc6c3a6844f9534de6dd251d3e3bc752. 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/QZNWW2358565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2b7845fbc367dd2f65b6760cc37cf62c38de75007cc3c69b461ff6c5192f73. 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/QZNWW2358567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d94251b16f997910d2b5eb1a248aa70e6dbddd1b26c9973045f208461c6440. 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/QZNWW2358568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55149a51d22b6fbba0548d543e2fa1565f38098aea240b4b898ff98304170384. 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/QZTAT2336888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e8abce0858779b9411df121fff2d87c416024cf6a30c6ffb7e1c41d3c1be61. 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/QZTAT2336889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b39155c682bad08aba6f3a6a709f3325fb44ecdb7aef110a66d6ebe09124fe7. 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/QZTAT2336887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04b416cf4c21635a23f707b34f52f704f3806f33339e85873452162e6d36be0. 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/QZTAU2315988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b39155c682bad08aba6f3a6a709f3325fb44ecdb7aef110a66d6ebe09124fe7. 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/QZTAT2336887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafb324024e1418eff581c0fceabb352e7f558dd24ad5b5ff5b2f9e25579b176. 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/QZTAU2367372.