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 0xb2e4a0d9d9ab27465465090e1516818c304313ac1231e763e0131a7698ffeacd. 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/f4be425d-d0e3-4dd6-96d7-7b0ba10b92bb.json and https://artists.proofprofile.net/proofs/artist/f4be425d-d0e3-4dd6-96d7-7b0ba10b92bb.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 0xa25413b0b8afc7b4952eac96edbf41c645db65379261460df8f949a97da310fa. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QMKSC1800253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087d2f84411ac7e324e06e46bf31de5fbe3c41df68c25f02de949ec1730961a5. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QMKSC1800254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855744fb38a2ad4e8894270067b9cd775bcde89482214c3bb80ee419938052c8. 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/QMKSC1800255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4727c3dfc6a9677b7bc78ecd358e5e7a4c3fa37734b3f24ae8f238e47b988c3. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QMKSC1800256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1206aa5d335f57488e0f4008401694efcdf69e90114306c11b27d42fa6b7f8. 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/QMKSC1800257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc724a37b5a008b9f15436fd56173f7b549871faa20d0e6c8196cbba35c3f78f0. 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/QMKSC1800313.
Hoffa at Lums (feat. 183rd & Ot the Real)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8699820a4d0d06d1f676601a0f61f293eb1663bf728592ed424c01c2cceacb. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/TCAFI2139648.
Lavish (feat. Conway the Machine, 183rd & Ot the Real)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3a0274c6fa22cd52a7ff6bb36f551c2083238782c09e0b114185eec4536e38. 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/TCAFI2139692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86e65190350960619e87e2b152c92e33e0f7cc3d300c2150f4211c26ed6acc0. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/TCAFI2139621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f3900d59ff29ca09ac69f1840e0b858a6b4122797f2d78484587648f7f2f1b. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/TCAFI2139663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382370789c16ed42fcb7610abe05d0a0567baf26e355b6e31f42f304dac53089. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/TCAFI2139667.
24hrs in Harlem (feat. 24hrs, 183rd & Ot the Real)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0133af404509511f8297a0e41f663af13caaf9131ab235a1d05cc62b8060aa. 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/TCAFI2139714.
Wishful Thinking (feat. 183rd & Ot the Real)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649aedd5e1b4ac2dff75089afedd78252dbff0a202512726666447c1e6e30dc9. 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/TCAFI2139702.
Last Man Standing (feat. Cory Gunz, Numbers, 183rd & Ot the Real)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb399e479a86650e41ae38cf78594a02b9d91be3a4de5d1186640ccc9a03813. 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/TCAFI2139719.
Speed Dial (feat. Steven Young, 183rd & Ot the Real)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e48c4ed4c94472286c74bc6a1767647eb9b1b39bde8fa788cbb77d5aadde7d6. 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/TCAFI2139724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0324d5ae12a7011b66afecde3787fe67fa1a9a1b833262c1780de06a42439989. 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/QM4TW2269785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80350d59d80906cca111a9bfaad83b2fc4ded8b0d958db6441eaba6cfa97d65e. 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/QM4TW2269779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5b4ed0f62d7193634516b7f7eb0a2e11bd39da5619cc44e59abd9e403a4b94. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM4TW2269780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6b4a31cc0892dc908157ad55f4b117b95a84da35bd0a70983d3e178237922f. 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/QM4TW2269781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1022f337f7873ac0edeeff832f9ee8a9f22414182eafce0d5f777b2050d2cc75. 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/QM4TW2269782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb618590a39bcd4019021521150bc836da4cab2ebda0229f83598fb5b6752c35b. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QM4TW2269783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd128133fcdd52e3dce97bfed8e5a7d4b8968a79d68bfee6100504052b1e54c11. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/QM4TW2269784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecba5d6c579c42c812174337ff36c7e57daa98710840730154480c8cd745778e. 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/QM4TW2269778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc962a756a984e14cc6948226ca9fabe47ed370600051ba74c0c84c8f1d40d8ea. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/TCAFS2139695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a5c6c725f3dfdc85a8473dd78a2f24bb9bb564bede85eadd698fa55bc9be9b. 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/TCAFS2139713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab16048a87758a8a31d2e72b2e28108917d53b99b00bb0c86b48cb05b191df6c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/TCAFS2139721.