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 0xe27cc75aeaeffd75c3071ff81f4cb248479f6377924c67791a98a53ba821be00. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/489ff4e8-29eb-42b9-9fff-9c6bbee5ac70.json and https://artists.proofprofile.net/proofs/artist/489ff4e8-29eb-42b9-9fff-9c6bbee5ac70.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 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.
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.
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.
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.
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.
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.
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 0xc0c7ae544b5e42057282a87af77e07c8d590b3c0b657a52549abd707b73c5e6b. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/QMKSC2101555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b2a44aa366de4dcb06be2cc60fb9fbf5a664692b7b7183d01b5fa8e15a33a5. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QMKSC2101558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6139f495abadf4f3e3ac8f38103397c90faf327e753919022ada5facae96caac. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QMKSC2101557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db67ddd2d1f1ed2bfc574b7f35a65d2f78558bd081781908dfb60f4c6886472. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US5ED2302933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4eec103ec51a75e0195915f97586a5c1d8672ea17f99b8b59727138f143d99e. 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/US5ED2202067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33224d1149c351ae813b3d9ab28bf94079e706c6e585b99a05ac3bd8af2eac0. 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/US5ED2302936.