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 0xb12d95789cb82cb9a4cf3147eacbfdee225c43cb8bbe573370026aaf549a4764. 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/0d8e127f-aa9f-4d80-a50c-c1dfb50132e9.json and https://artists.proofprofile.net/proofs/artist/0d8e127f-aa9f-4d80-a50c-c1dfb50132e9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Just Like This (feat. Big Head) - Chopped & Screwed
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 0xafd51e331c3696a3532c17bc1062d81558d280b2165180e49f63f9bb41c8cf5f. 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/USLD91757174.
You A Trip (feat. Big Head) - Chopped & Screwed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c665b6cd87d385802e6772fc93b04e9019c539463d09539fcfcd4ccc7d54958. 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/USLD91757175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af079a5a16eca8c825001acaf489281bfad4acb58b60b1e38019007d01a41cf. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/US7VG1534048.
Bank Roll (Part 2) [feat. Webbie & Big Head]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc56b9bc13266790cc24dac6200dbb352aed97858d441e1429fb702cb04ad415. 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/USEA21000138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc56b9bc13266790cc24dac6200dbb352aed97858d441e1429fb702cb04ad415. 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/USEA21000138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33789f1806e37aaa2e0f31b2fdab966683feeb23bed91bfb583c38c0098d32f1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USAT20800782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1288ff34efd648dc27aa6c787d9d44cd208b7335408024e51343764f8cf202. 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/USAT20800783.
Adios (feat. Foxx & Big Head) - Chopped & Screwed
Survival Of The Fittest (Chopped & Screwed)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cdcbfc4cb00ede2c5f0a442fc64d8edeeba57d6c834b1f09934470d467aeef. 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/USLD91757137.
Politician Networkin (feat. Big Head) - Chopped & Screwed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfe6e44b3a9abad776bd855ccb6163ddd21ebed292cc9f402e503006d6ce531. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USLD91757140.
Same Old S**t (feat. Big Head) - Chopped & Screwed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5785fd0a7ede279bdb319f9cc0c411398a1aafaee32a47885b747847a4694de9. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USLD91757141.
Say Round (feat. Big Head & Foxx) - Chopped & Screwed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bb042c3003df242ed639d9206a8670fefedacf6c365b02acea3ffe95a2a0ec. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USLD91757142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87466448581b71d7b33ff738387c484b7512b5400b6904c4f3069474e1e64f34. 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/USEA20700290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494447cab7c6b5edf7e1bb3a06d3e374678e936a02d68f8c50e418857838b73e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USEA20700292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf132133ad1209b7a8c3488afd487ff4f8c13749efaa1be878ebfd987f80401. 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/USEA20700296.