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 0x85d92b9835cd396e67deddc2ff6cde2fa0e718846b4fadce50df9c65a7945090. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da3c8466-b3e1-4b19-8b88-12eb65c73ff4.json and https://artists.proofprofile.net/proofs/artist/da3c8466-b3e1-4b19-8b88-12eb65c73ff4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Let's Just Do It (Feat. TLC & Missy Elliott)
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 0xa19e3a74508039730421f2e76dba4cf328bb584c61e94db33f43a30935295428. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USFJ50900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda510f6d2ca3a523f4d5f5e0d078cc703d8543c82980147fe8ad1800759731e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USFJ50900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9981dd362d2559afe23a41c940e25e6f6cb2a1b3cb8c2afe9d39e4d8c9eab12. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:44:51Z), 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/USFJ50900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda510f6d2ca3a523f4d5f5e0d078cc703d8543c82980147fe8ad1800759731e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USFJ50900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76f22ccf02fac676e583134138be64bad266d3ca007a3f87d0563a8fc776c99. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:03:21Z), 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/USCGH1344903.
Let's Just Do It (Eyereign Mix) [feat. Reigndrop Lopes, Missy Elliott & TLC]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422bca717c357044247ab377af9f32c22c14b7048ff46f549711c5896325e85e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDJ29800799.
Not Tonight (feat. Da Brat, Left Eye, Missy "Misdemeanor" Elliott and Angie Martinez) - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002b257f81e54fba6463c33ec76d4ea2481f59323551caa89ad2507d4c68fed7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USAT29801132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafac8750e93ae0ca302679532f541fc638e4b4986390cefb14a8ddd10871202a. 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/FR8GV1714490.