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 0x60ce78dda67336881865e417b7b6f4fb4de52d60fbcb1d1ef776bbc19fbe5d8f. 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/d675643e-47ff-448a-b837-f538df37e7e6.json and https://artists.proofprofile.net/proofs/artist/d675643e-47ff-448a-b837-f538df37e7e6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nas, Foxy Brown, AZ, and Nature Present: The Album
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 0xf8dd9f772cda2e465221e7954a836fa2e2ecabbe94086f32155721c5bb0063ff. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USIR19701512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfef242930a49d4bf1fbbba1bf77e6ec2b7cc88ddbdc845ebf8a64632cace3d9. 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/USIR19701513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40081db041b3b6625fefd8dade7adc83be9c349599696c3bbf4a4a7617b75ff1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USIR19701514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfef2a6bea66aa627ee4ee31f6e89d7508bc5be227505795bb9f883c6b8cf521. 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/USIR19701515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe286ac0ebba2cc3d973d9ae6c3f6e4b12cdd8f55eedefbb8af69ee374675d44f. 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/USIR19701516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf332952aa3f0d97c71fc0b403dc3e26e48254153a0b3115b1b7ea4bf9eb7c597. 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/USIR19701517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e38bff3d16de99f98b959dfb90da3260022c64ee0c4eabb6db4f8305dbcf6e1. 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/USIR19701518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb589aa8d441a49f24b014a29edfa79e2c852d61d3b8fd27c6239a16b9b647ce3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USIR19701519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e1af5c4fd84ed1e339f69f0a44ac5d565af60ba79120c7c415417745c6c7ae. 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/USIR19701520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1697c24c7e63b3c17a268c8a05c8e04ba9c3c395726a83ef153ad4c5f4986a5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USIR19701521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885dfe23c108abc9bd1fefc45f3168b25f7b7c349860ee8b5d631353d8ff3b20. 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/USIR19701522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61cf8c5ab906f48324cefeb5a6f644af30f974a1ba0a1285c3a879cbb0a2c57. 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/USIR19701523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1c8597e4958b094914e6c9765b14e77841945bf35007864127b6df64b06c53. 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/USIR19701524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d55bba96a1d56eb393473d94a98f2a5f258e74e1353b0572279e7a4adf85fc. 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/USIR19701525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4daab72ad31379fa7daa665e9733cd99747f6ec441cc7143baba20936f8ebf47. 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/USIR19701526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7048f0e3cc58cf4f001f50f3b8abd94f70e91c4f86614c0667e18c94fac650. 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/USIR19701527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eced6e918c94b38323f9f1dd537193109193bbe9aad5fdf3f2b47b3b58f7e5d. 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/USIR19701528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c59698ab4824b806d5097f29ebbcc5c9239735b21eb54fd404c8f03b859d81. 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/USIR19701529.
Full Circle (feat. The Firm, AZ, Foxy Brown & Cormega)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7887111cada391b775ac80ab67deaa30698911bb03ed3aafb238db9ad272be. 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/QM8RL2001085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7887111cada391b775ac80ab67deaa30698911bb03ed3aafb238db9ad272be. 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/QM8RL2001085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0d15519798e7be17a9242f901e6bc9f248a4cfc0b95e349fbe3653a5ebdb05. 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/FR8GV1830080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9df86fdc3da0bed731a55d3eba93492a9fc373aa2dbb4a73333e0b072e967e. 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/FR8GV1906730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdcde8f57379e1b96e4e9aa2507dbfcddb94422d6277dfee355b917aaaab8dc. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR8GV1906740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0d15519798e7be17a9242f901e6bc9f248a4cfc0b95e349fbe3653a5ebdb05. 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/FR8GV1830080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0d15519798e7be17a9242f901e6bc9f248a4cfc0b95e349fbe3653a5ebdb05. 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/FR8GV1830080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdcde8f57379e1b96e4e9aa2507dbfcddb94422d6277dfee355b917aaaab8dc. 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/FR8GV1906740.