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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78865953536d6c74dafc159990ecbcbef889d142c2362a6e3b1a7278ca7f5a8c. 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/aae92555-719d-4ed6-841e-94453bba1819.json and https://artists.proofprofile.net/proofs/artist/aae92555-719d-4ed6-841e-94453bba1819.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa931eb4e4534df67cd015e4277387ce27793ad79a01e4c2f683708e06511c713. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QM4DW1773277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe633bb71b2fa1f457facaec008e2130c155b095f88bab8cd6518817c62fbabe3. 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/QM4DW1773278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c016376e3b08d11009b8cbfc9b27fca4a3f2c502175d19b42919f2d811c3e9. 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/QM4DW1773279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69e7b17d7fd25721de08ba14b32bc0884d7c5d4ac4549c35a26815ca0cf9421. 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/QM4DW1773281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde9335dd955523c80fcfc53bed6f7019b8c84ff211e1d5655f576294810a466. 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/QM4DW1773282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc3572c897ce46be4e1c16db1557e9016770881fa08595e1e9f0802ed0e7621. 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/QM4DW1773326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebba1b381ac74b667d7b7228ab2deda36af126a6aa96b9f6febfd7e6029f929. 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/QM4DW1773327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1628eea46bb0f75cc1a2a1410882404a1440349bb9ee82ad5b90ac7e68a628. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM4DW1773328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba1305c2ecd6f707c1ed984823afcc8d9f2f3f9a5722f0fd75560ff188cef2d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM4DW1773329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073d7b84994b08ac2b4115d93fb0b3aa3407a743e2f9def1bc5db0e1f23e4408. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM4DW1773330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bab9d698fa2178bbdfd932f91a32879cbd23e4b0abd37af7e922d8e30434267. 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/QM4DW1773331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b7e19f870e3b8141c05c7dab7979ac1c18df33bd59a2ce635a19e1523c8c07. 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/QM4DW1773332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1607cb467f6c5729327a391b486871bd965dc907cbd54e2014bbeb0fe74116db. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QM4DW1773334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77874dbf20b655040f98e1738fe9369127b29537e6ad1339c0b5637a9ddc2a6. 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/QM4DW1773335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3582b214c622ebd4dbe5669e3c62ad41c29edb226aa2176315db16e9c9018089. 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/QM4DW1773337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058c8b9179eb9c50ebcaebd9aa756a99b29017e75b5f712806f8a7779b49b080. 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/QM4DW1773338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352f4500ba47f9ce11140316b63f0a3a35a76adf9f425463e746e6904bb344ab. 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/QM4DW1773340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba81069f2515f8b183daac959d0a35ca33464366bed1f4fb79feea07f9d53f2c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM4DW1773333.
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 0xb8630de78b4f6d6e17443bd74cf3484ce3a7931a710d4e30d91ed7a5b86de12f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QM4DW1773336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd29071c7a70e555c7ca87458db56f336f16ae282451f6e9e5f65d728d229d0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM4DW1773339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a7d95ae058e0cd77b882ac485aa3403064473a9bfab65ffc41f682df2bcb87. 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/QM4DW1773274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf33fcbd44579c4ea55635ca49a9aa58eb18a0d68fbe5c7592f938a1764d060. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:35:15Z), 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/QZBRF1802671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11afcc8149c60d2bf90219268c290be2420c909849133adde5b6d657a435acd. 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/TR0012200506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31905cb43826dfbd655e46dfe51484261de2090a8f77ee276101d5431fc32cc. 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/DGA062272929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f28473ef847baaa00afa2998fcef6b3e4d595b2246ed31f00a7f2c834b5f03a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TR0012300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982c23a0772b068a386bed6d0aa9a437bddb63fa764be3eb1a6f790794eb3645. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:01:37Z), 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/QM6N22427466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71e9574513292b7ba32ef985c00221a766d08021db57e84ade1c2628653dd97. 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/QMDA62465855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec99c6ec986a3a8e5c2562ea5612a5b5d79e43337769f807d9f883b2ad530b5. 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/QMDA72498371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcc2870efa003a3dbb509897ee70fa8145cff740b1445fd296b0fb6d97cf3b0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:25:23Z), 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/QMBZ92510629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5aad9446ed2e5beafdd5a298d0f735a5992b9252891b7acf038eee5652e4c33. 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/TCACK1594919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cf01794cb2459edcbb0c1b70732b3c1133895f0a8f72022c756246dc2a12fe. 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/TR0061300532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4875c3e7646572e26440ee4f70068ceb10eb0e1932815dc8fd1779066311c5b7. 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/TR0441210202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cfae2df0a02bc7d43a38cd76ca7be5ee657c0b8c27c57e0bf47916c72130b5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/EEHU32000386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329cfe5f7aeda377994ff924cb101245c963e7380ce8e21cc7e70c0d9bafd5cc. 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/TCADI1776217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9329f013f0390edcf6b044bc9443f09e7e788b0bf73f3a00fc935009e47b7173. 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/TCADI1776477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a03c9ee7b257c4ea157269a7ee589a1cea3776caa310c09d4723585233b90b. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/TR0061400101.