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 0x47a3fd0b5fb653df6c861eada3187056937488da092923f49de10e1ce5e46403. 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/84a350aa-c5c1-4790-96c5-d6e4be28b28b.json and https://artists.proofprofile.net/proofs/artist/84a350aa-c5c1-4790-96c5-d6e4be28b28b.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 0xac8a5397cb42b06b59007debc0e54570ea3590719e7d543641387ef4cf1330b4. 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/QZKDK2111060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fc90c1dbf1c07bc5d6b549dfba84d6d8861c2c7b7a4a540c536f15460ccf8d. 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/QZES72268771.
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 0xe1211e55e1421ec3ab48eb440fc6bc49c4ae27d9d59061d28cd3c21496555769. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZTAS2323052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7baf5b4d7e74449b08ba14ee55a81fe3d63349f93b9322ba0d1b02160a6bf678. 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/QM42K1969038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac3b43b2650367aba95d60d4d12f98a423a6bc527f53693e6bce7d9ecb476aa. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TCAFS2139821.
100 Years In The Duffle feat. Slayter, Nym Lo, Jayy Grams
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a914e0cc042e7eb55cb5139917b70d7640599c07519559d517b0fb4482fdf9. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QMKSC1901215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58460810467bc772eaaafd8ac61296fd760900722d0d5eba91778faaf5d1dd1b. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QMKSC1901044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ef2da21241aec769d3870656e6162ff72e11b26dcd20d86ca4a64a92bd5415. 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/QZNWX2281304.