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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cb5a48b54e322ab5d764b6f460abfc31a419e82b5421c9c77c4ea7dcf16557. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66307762-4418-4d6c-917c-a695fe81b3c3.json and https://artists.proofprofile.net/proofs/artist/66307762-4418-4d6c-917c-a695fe81b3c3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
In The Ghetto (feat. The Jacka & Rankin Scroo)
The Block Brochure: Welcome To The Soil (Parts 1, 2 & 3)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485bbdd6ba000864960fcfc2256907a7106fd791332698725f863bb78057b86a. 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/US4KV1200032.
The Block Brochure: Jumbo Pack (All Six Albums)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485bbdd6ba000864960fcfc2256907a7106fd791332698725f863bb78057b86a. 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/US4KV1200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e12f86c85b7301b71576f626a7d316d6dea04fa672204ce0e62370265cf2a6. 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/USBAE1203516.
Gang of 'Em (feat. Beeda Weeda & Rankin Scroo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ffea56711dced8d246e5b59713183e54a203cef322997bef145ae7ef9e812e. 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/US4KV1200234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ffea56711dced8d246e5b59713183e54a203cef322997bef145ae7ef9e812e. 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/US4KV1200234.
The Block Brochure: Welcome To The Soil 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485bbdd6ba000864960fcfc2256907a7106fd791332698725f863bb78057b86a. 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/US4KV1200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e0886dcb5bb660006c49788627f13357438eb1dba07da6d992c55b24c22c57. 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/USJI10300303.
Bust Yo Shit (feat. B-Legit & Rankin Scroo) - Dirty
The Best of E-40: Yesterday, Today and Tomorrow
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075547aa1e9d372642ae12b59bd06a17c29c07dc857dda724da60dd259253528. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/USJI10400745.