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 0x68b262fcc526a20f56974d336db5a90d10930a60709916035677c00058d014a4. 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/23192d1c-2032-46ac-a976-5572ad237099.json and https://artists.proofprofile.net/proofs/artist/23192d1c-2032-46ac-a976-5572ad237099.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 0x85e982d2334d184a73c4cfc8efd61b9302f02bf5c72de07428a49e4ec03353f6. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/RUA491310350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd9af8dbf655a89fd1398911dca34804415c7d043baf745a72bbbf473613c3f. 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/GBKQU1554317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc278855a068732ac2db0519a05df55b0c51fa2c26b26520eb9c030675ccf60. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/GBLV61611449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ee6d7cd672587df94fa61719069b637b351aa43f9bdd8e754ea1594ff63f21. 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/GBLV61611450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7538bcb54177b95bdf5f749ce2051fbda360372a032420a2c2c983df84b074e5. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/GBLV61611452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd311614f28df87f17ecb653662ab962b5c5f1e9cb0984a7aacb418e2c65b2c6e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBKQU1760359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e81591ec11f22b13fb84bdb2aaff17c205cb035628138e04fc7b6915c61082. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBLV61719056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df15ad9b747a6a506bc45a7fe896af01e1385130ccbccb6f51caeb9f4b96bee. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBKQU1882344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5de3bbbfc4a2065839ed3bef374fee0e2623caaa389f5539664c9b1b67ce33. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBKQU2031849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe909266db85f41d39ebc4ca4f966adec3a082fad73e5b7c97d1523f1af575833. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:35:50Z), 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/GBKQU2058765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06636a5bbc5aa502b790bbf5a9b6ce9b847fe1d0c9d4b8c0bad4c096043dace9. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:44:57Z), 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/GBKQU2086595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af1a8cdb4fcec564f9d983c6663c2318a3762f7ef6262372770720438df2681. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/GBLV62008519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b9ad177f42bd3c679fce00d775551270b367392f8fb2876a0c11dbb008bd94. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBKQU2165940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a35f665705822fde9568f9e0b8a8a45a9eaca392d0c7fc1ce42c97b5a98d1b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GBKQU2177736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcaa1873237f8cef1e8aa4c67df2c825a59e7ee0c9bc28f8b37a2e4f91c6fb5. 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/GBLV62113255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa585bd8304c4bf0967b81f508862ba4f64fc79b6362b6fd5152dd752c92a53b. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/UKU932260061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621afc950365174b2d0c3d06078c7380b14d6ade04ba37d787c17d48843e908c. 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/GBKQU2278954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c588844cd076080cb77db4d434d5cc77332599d9ad187f831a2435d8af4339. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/GBKQU2293082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06a935d16bbf79fa0c36e187fff9d2137ee4cb8bf5d35884084b11aafa66526. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLRD52319552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceabb2e8111ac911dd88130d3dcb4edb47e9cc09acfaf020161e634471cd39f6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBKQU2402293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091ac2b890238b3ffa2c2a07da5d2c0b59f233249514e6a54dca2a105605bee2. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/GBKQU2412913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda2a767d895d8d27a61aeea21eae3efb02419a9b3a0f83985d1e32b8df2f304. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBKQU2445834.
Sol Brilhante - 4i20 & Capital Monkey Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c13fe08c0bffd59878d75db36a027a7b3e45c048a16253e51d261faa66aa36. 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/GBKQU1927961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73961206c384fc84a63f8448ccf80793bb6152571abf62a819ebd516b4417e7. 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/GBKQU1532519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ef475dd14bd1e665328ba83ed7be88777972f8bef4eb188cbc759410ac8e3c. 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/GBKQU1763546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27b15c2a739f266597ef978faf7a4f4fffad6b9a5381905577e560ea4523534. 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/GBLV61637832.