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 0x55aa1e92d4f497b6d71c600c0e749b3158aff7a5cabae7a61d459e00f739a1ca. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5a94bd2-da3e-4780-ae00-d00991c0a0e7.json and https://artists.proofprofile.net/proofs/artist/d5a94bd2-da3e-4780-ae00-d00991c0a0e7.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 0xf4ec301c5d6d330d4a2cb7e50dfc12589d4c96855049208f41e381a046455aba. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USUYG1081296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bb39a9f8a670b0ff31e91b0605aa6ea32770d4c19e4f9c58ffd92b74e36546. 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/USUYG1081166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667800f3502fd8a0a6a2d2cce406ed0e0b67d846fdd9f727c45edaa88c62f2e7. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/USUYG1081173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025c2503bb561637a0ebf40efd48f90f2686f662b189c89dc0a5d3f3c6aae4cf. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USUYG1081175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18be58d196e521514daf9f9bc217c91815ae95dfea2cbb412eb67b3841cb6470. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USUYG1081178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b2523aa9e94e183c3b001f3d0d7ca1feb4495fa59fae7f632bbc52bdff43ec. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USUYG1081179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272f334b2c96b4bd3ffa960e1966d4095569a9d61cc1d1d16c833fda3d1c7238. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/USUYG1081181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9454423146a084c57a52cbed29f48d534432e5dc214aea02960a65c27481d3a3. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USUYG1081183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ba7504e8ba90f294a9989b838da0c4a33fae8a609d143ba9a8e2c2f335104d. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USUYG1079711.
Motivation for My Niggaz (feat. Lil Kev & The Mic) - Single
Lil C.S. Greatest Hits: The Classic Slaps
San Diego Got Heat (feat. Ecay Uno, Mitchy Slick, Damu & I-Rocc)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea0f47d9664413936607723c18a864ae959eb7f231c4520cc205e1c90d21c41. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USUYG1156638.
Rap or Die Presents: The Southeast Streets, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9709013ee88e13a017d2fb0f830b20fcdb392e94fdd0cda63200972c51eb8fc6. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/US4EM0710023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c99d2e5957f2c3faa7bc46569df278f53a92bfce15b3f12dad1b26d49902ec6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US4EM0710025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cb23a5a81aa690e7f366931945871486846ee3b8b2cad53a2be8b3a875d20e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US4EM0710028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084fec3011814aaf2ab9bcbb027bdc3a58cdd56a80768df88e362702f46bf60c. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/US4EM0710056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2382a034bed68049cd0d289f357ac3fac52a4ad32701448e3514298d29a28563. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USUYG1065643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69a68644c5282fe44c28aa1e0c918d4237a93a1e6ef4fdef8dd1220214cde2a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USUYG1065645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2fff58cb9aeb2e3a56529c16078f2cbd0b3b3db7c5038d0308f043abbc0ecf. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USUYG1065648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9786303718e69cdd157a9b3d0c9227abac44321f6a9d153ca3f4f42f90d070. 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/USUYG1065651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0731d9584f955f27a9afa7dedb1355a34c270b39b0873e7f0f7b98b071fc18f0. 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/USUYG1052880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc429cdc3b17cc8f0af3d11f9a71ff8145fe55f1b51ba3a357a564c2f5c24eea. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USUYG1052885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1386ff1579df1eef2f216d77c87024d040f629c82ca2a65badb8221971bbbf. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USBAE3365754.