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 0x5cb0a4e06ba7d0bf5de00383b5c5cc3465a2130b504463d972acc9878a61106f. 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/80d5ad27-475d-4412-b65b-4ff69985d120.json and https://artists.proofprofile.net/proofs/artist/80d5ad27-475d-4412-b65b-4ff69985d120.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872a094f130389540e85e0d4c6897465dc07efb7aaca86d6eb72a734ea978d7b. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/USLZJ2484716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa1f85cb91bbab22e56dde78428a7ceca122608ce473ed98e69f9515ebd4748. 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/QZ5FN2344362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a8a4adafbabd2138f1219486a21f080f2687800da60d778f5727915f3f18a1. 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/QZ5FN2342179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a105e675477e020963d5c58ccfd866ef68c1fd02aa6d11781ab60805c07cdd. 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/QZ5FN2342396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bde16dc0540a8b40c2c6109cab6af1c97869b6cd2186a36237fc97a3bc82ac3. 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/QZ5FN2342182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d288425eb5fe31159a44d6309a3df6bc927c6fd9169f951f6204e4b3e85d6d. 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/QZ5FN2346091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a54577f2b5a9f9ee94c43476074ce152049c782031707885d2b90426759e851. 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/QZ5FN2335566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97a23fe000de85b3cd024b661ac2b42d6d27d770f739275e4fc8c7101ab88de. 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/QZ5FN2346104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5076bc0e86b66a3e0a36a2c45faed456446c17ed7a1ebd4c3b15b95f7a67a75d. 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/QZ5FN2342166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18700d8b8950e1046dcd14f6e8b61337ecb8f4dfad73ec9eae5247c7f1def873. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZ5FN2342205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9160492f4f5f1b3d90e166bd567e2605a6d7f838cd17cbad8346bf1bf9a8ef. 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/QZ5FN2335527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd359da1ce33904268474d44c053ac234cf8baa65145db4c46753ab307f3621ad. 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/QZ5FN2335549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39d48b20c8e7b8b3cdd60d6fb1bff642dccdc2b1bd1c532231fff7dd5e37161. 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/LVL152202680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3d21df6058c00284ff4ea8e6f7052eaca952695cb480398d4e91e55b4f25db. 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/QZ5FN2335237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08d812429265169b86e7d4fbe9ff96726abf075045c867227fc4e5ba3928c3a. 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/QZWDE2403927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd276482d404fcb29a6b3ecb74a7d85c335c24a93cc7642985e13444017386f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBRKQ2471897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3337360073b40ed4f0b8520b333baa5ec1b08299a1b63f5d53a5ab1b4700baa7. 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/NL4WT2300247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa66286981406a06e949fc9a3d74a203d7f43893652199431fdc470e1ebd6deb. 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/NL4WT2300221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bde16dc0540a8b40c2c6109cab6af1c97869b6cd2186a36237fc97a3bc82ac3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ5FN2342182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9101e4ccd63645da65512dff38fe563b86b2c275bb5f1bbb8fb538dbbb535b60. 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/QZNWX2036212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0afaec16dd23862bb7e47b58d1a756e26e9524c879fa0f2498e8866b3d732e. 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/DEZC62371453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a0fb9ca1cd67ab8c9b03a86f7c765e7f6bf5b5bb20061c18c168dbd088321b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZPEW2519614.