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 0x7a2a1b4d48fa9350f383c50eca5e1baed9c456fad692c76ae409af9a40c1e446. 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/92c9d70d-5624-4e47-9011-7a375510e74b.json and https://artists.proofprofile.net/proofs/artist/92c9d70d-5624-4e47-9011-7a375510e74b.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 0x658721cf95b96360ddab6025409062e4d109c8176abd90ff50a45fa58dfa14d4. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QM2PV1818046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7351d1a0b5d0df80acff6d85c7fb0dfc29fca4a94c931d5b27349e3506ce3c60. 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/QZHN71955972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70ee8ff4e710a8f8a9f2ae4a199636832e274da8630f688355c6a1e2e0922fc. 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/QZHN71955976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ecbfd60fb299ad7837414898e5d091c47fda59d70f46f25603a33b75a84de2. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZHN71955980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52daefdcb80907fc0f3a76624eaad6b79040df6e248a64409b70fbceb4833ce. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/USLD91729996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cbe54ee2712b68ad359aba7730fd0a41c538e9f38bae45f139bfda4eaf1483. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USLD91730173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a02376f94f188081552e6b67b73583df9232c5de254a966e935cc73d7ed157f. 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/USLD91736229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65413a5b6d80f2d7e789768f255b8cf490f985c65af547a269e4a45ec11b814c. 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/USLD91736234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87be5190cdfd1cfde4c6f478d080457a6c7b1b0a4ed8c4500485037de945a79a. 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/USLD91736235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a090551a264736d1d35aeb15f79f92a0d7213b1be2ee4893ea0bd0018ed2244. 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/USLD91736236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f656736c9ac517a0c641d75dc234990d4f804b519d99055a9687c969ddc32c7. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QMDA62215364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e338fcdd81ddccc0b408441fa195024b7136d989f73a0592ee2163936f2af7f. 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/QMDA62215365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c2061d847a6ed8ab80d37431a664877c008d6cc58bf2b9ea95ea05c3b9ed3d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QMDA62215366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6e5f699ebbee3a5d611bf81497d5b010332375cf9a2b87422ddd8c8a6f4c22. 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/QMDA62215367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d571ac18f4516ce670275dd4f10fc239e882009a9434990469733fece702167. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/QMDA62215368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101506edb44f40d40882a54edb7f250415b079518f49742efd634faafa2679f7. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/USLD91754583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82b3087f11d5686ed8e98170bb2821f413d64a1c9d805dff79eff4f5bb809c5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USLD91754584.
Presto’s (feat. Free Creatures, Jordan Polovina & The Rap Hippy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02a8e90f2e4d57765f81688fdbd7cf905d267b4de4a5677904efa30d2c8297d. 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/USLD91765245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58d945f1a984608df467ced90a3f127670a5a58782582f9a349ff7ee6839924. 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/USLD91766840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25bec92aaf630c791226ca5f6041920062aae114875eaa4ae1a5f033fa50481. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USLD91767640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5f73860452350496ff6258b1ba4ba00f2ee0b36f44a39ad027f9e47248000e. 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/USLD91767641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fddff7f44be9a466363c6d6c684fec4e7d81851c43e09c337d28719a229c73. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USLD91767642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd1b61110eab846cd343895ed09a8c1be75f25464392d93043586a6fcf97bb3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USLD91778252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a946b1d49b67312783ea1f78d110d888302fade26edada30e9f7524d2d89cad. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/USLD91776443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5303c6272a83059da2debcfff6a96d9b4f10ba09bc3f5b77fb9a5f61e3f5cd. 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/USLD91778253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea54648303592ab5a9575872f9a5a1307f435b8bd767da20bca4c9bea2caadf0. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/USLD91778254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1608ea8d833cee324f00b2546d9ab029381a69c62b0b98808103ce2a8e01979. 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/USLD91778255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5021fe3d4176341db681ecf015542779823b0eaa591085ad95b91c949c18d93. 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/USLD91778256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006bfea61877d52ac2f10b4bbeb33a4438bef9c20a2d6b6669a50c0babc63b99. 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/USLD91778257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143500a4183fe489eb1c859d0f376052b95f6f1f973f6d34921fc773691a5f22. 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/USLD91773016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fea49f00f6298eb0a50d9a2c4bfad507a0c781ed1e0aea79425706e0a177127. 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/USLD91759727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6bd17f925e56e9fc8982369cb4d6ac6aa66eda2c9d3612630f7d64351926ec. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USLD91782261.