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 0xf3ab78b6b26d281c9110f41043baf85346cfa7e879ebdadb2dfe72cba2a5a2db. 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/d1cdb2fd-fda2-4273-8414-0a3a9c18b522.json and https://artists.proofprofile.net/proofs/artist/d1cdb2fd-fda2-4273-8414-0a3a9c18b522.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 0xee10c999a1b3622a0c3b85bdad7602d923ae28de8d0f9558dd89bcfdc30923f8. 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/ES11D1900240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3f02ccdff0aa55781679126811b5e3aad4d3625421b663aa0524956fffb44c. 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/RUA1H1800321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74726f78b58f21b23d1e80e86db1604a8e61476de2e671b975ca10f301801ae9. 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/AEA0D1927476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95aad82487e8f376c3aa10f4f514fb22b4dc6e2af75c095536209d2931c3b790. 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/ES11D1900238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94cd897a73716c719252d4d047d9db53ac9f76750503ca3746151a875294319. 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/AEA0D1801447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5c85b1dd06401da50d7ee4a66edbef7719fda49f36471db9d1bb55d4ec3cb0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES11D1900239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e05e611f51438efe7a48c82b86a0c361455c7cdd9c9fdd7e78b968645e9c160. 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/QM6N21997688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee10c999a1b3622a0c3b85bdad7602d923ae28de8d0f9558dd89bcfdc30923f8. 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/ES11D1900240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b309306aea48a93dcf6fc855a88f5beaca8d7ca07aba69f0c442447e830738. 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/ES11D1900241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30dc357486488819f66f9d2afcb96b0cf3021e3741d77968ec756629516f1675. 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/QM6MZ1953290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1ffa936334630accbf2cbd6fa9d5856fbcd982c2c33e8b3d4e28bc35ac2724. 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/AEA0Q1816803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1af72a2209b93ccfce13e8627efeb2712978d23f82eaf85ce57a3138b979a4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ES11D2000293.
Cap. 1: Fanàtics de la serendipitat (feat. Smoking Souls)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb71a622fc3d4b584406e71c115aa4d50674fe67b181ec3a7ea62f8106b0862e. 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/ES11D2000414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df2aaddb02f8b5811c4804a2cabd098cc0e746dfa1ac817bec29ed52b553942. 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/ES11D2000416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cf1f3f1e296c44fc606d3ddbb0161c9025647b6448711b273933bf0a0187f7. 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/ES11D2000415.
Cap. 2: Havia de passar (feat. The Tyets)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb71a622fc3d4b584406e71c115aa4d50674fe67b181ec3a7ea62f8106b0862e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES11D2000414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cf1f3f1e296c44fc606d3ddbb0161c9025647b6448711b273933bf0a0187f7. 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/ES11D2000415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df2aaddb02f8b5811c4804a2cabd098cc0e746dfa1ac817bec29ed52b553942. 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/ES11D2000416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5de02bdf6fab5a52dd6a2580e83c10f6adb22d051c64940772bea10a89fe61. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/ES11D2100535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe430a90f6f087b41e6527a97de6494c1eafe3f275d0bf72b2a04bc7ce294415e. 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/ES11D2100582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89e146e4b9619b78a461392b22c69046f00dc9552623fe11b82701cfbb4caee. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/ES11D2100649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b74bf4a7146e7a82c69bce171d1df984aaa1f23b0747e801588b3e9630aba06. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES11D2300926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cec28df7325960459d1ad9a78dd51ee87a67c5b929dbbd2b6181c3dcff7d439. 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/ES11D2300899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08a5a65b02ac98583c00f124fdbac964aaee8a9d16e12f11bc41c1c464e9eb5. 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/ES71G2401696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58df577d25818e38c72d3e19a164b26b5f8f30cd58285d8c6ff26d219eae62b9. 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/ES71G2401697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f46a8bd79c8be0dc04fa4505e04c7f58a090c6d11708d773e0adbae5f811e76. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2401698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd010d3ec2372f0ccb23ee8d1adcc3cdbbb9ea753f586a2cd7af7f8c01ea6f289. 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/ES71G2401699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf3da0dbe7b81c22dd1d31e2d7292f85e1c0fcc9e6e20e7ff892dc285231af5. 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/ES71G2401700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cd7a45a6fdc80ec5a9137fc95e9c26d693dca54145d4b23b169e9cffe4ebf2. 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/ES71G2401701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbcf6be0a82b2e2b82aceb723b54b2433755e120d28271bd7859bf52c9cc20b. 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/ES71G2401702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c31108d248487aa00c25a8bc277262408ab10c2657fc80bf97021e74dacbde. 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/ES11D2301031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b39ef0d186ee1b91582222273c4f97bfa74333880b454dffc89a78e48338d7. 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/ES71G2401703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b74bf4a7146e7a82c69bce171d1df984aaa1f23b0747e801588b3e9630aba06. 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/ES11D2300926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3200892f69a8cc027b3b3e0d34891ee2deb2ea9fe0dc9e44b1ab62803c3496b9. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QMDA62505429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116c991a0a9447f0d8218c7c1559d35152626afbd3305d8c31988cdcd10f49e9. 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/ES71G2216657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb20cee8348402bf6ed99f21961314fe079661b85a660bc84fefbfb23ca8792. 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/ES11D1900259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b3402ba4db21d729211e3e576c900d27a1a080097117d1c9e290bc3da86d5e. 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/ES8022000193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b3402ba4db21d729211e3e576c900d27a1a080097117d1c9e290bc3da86d5e. 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/ES8022000193.