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 0x0a02b380b25298771c3946c4a608fbf6660fb0a6f3506685ffed5030f3ba35a5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18430c6d-73e0-4306-ba2a-5e9b104050ea.json and https://artists.proofprofile.net/proofs/artist/18430c6d-73e0-4306-ba2a-5e9b104050ea.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 0xd10ea215f410244c9b1ef0a39577268147a460583e95ee28fb7c76dd63a2f192. 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/QZFYZ2293213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19895bc6cc390d30ffeb97680a4e7222d38d6b2a47df15e436a537db28c153ef. 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/QZFYZ2293216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca320af9b5a52b75071a2204a14347885f7cffaf7bd23d9bf208602c5dd1520. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZMEQ2214715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20a1afefe203044e66822d3642702153898d52adccf5a859ca2b77e91d81903. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTAU2256141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311aea5d3fbc18e1f5880690529cc09ebf5d5ec203cb13ee2ea778455ee2030f. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:58:39Z), 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/QZFZ32359632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a7ed9086d56e5e162a87f6ba075112fc301fd87a43f234c6a8fa948a48083e. 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/QZFZ32359637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13279ed7ae8ca6f0ed3308ea88ed6cc740f28653d7caf18b1c9626d4d02d1359. 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/QZFZ32359639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf314ca6f3d78e2420b80521593cc1ba57bb23834dd16c5a2b94c2b3a6adbbf3c. 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/QZFZ32359640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fe6c534f1b3cc1ffd3dc8732aecdac2a3b6dc59169bf9db682d1005f1e3c98. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZES62379320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39462b8d7c75fedd154dc9cbc37c6e7ce25b7ff3f3f909199b0a3dfcd37bdae3. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZHN82343133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf27c0040913d1a44f6018f49b6efd1d507318339deeb24e2c7d654d60bc3bc1. 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/QZK6M2399034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692a758b12e759c22bd3a05cc255f4d14a21f2dce702f55340c543e9153d1695. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZMER2377049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404d03f8dc493c687f2213a741ea4b5c06be3ea5ae15037864f1ae2e87d84f47. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWS2318777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f6d8744e32ec066fc9bc73a2b55e7162febdf2e12d147021df10fdd364e1a8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB62300585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20e66daee65d5227548a57febb4304079d0313612c2bf742aa4a5434ec46de4. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZWFG2396206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49bde7655f819e20ba629bd32e28a996b952822b9994424cfe28b2c29d1cb11. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZFYY2427740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7f931d1ba325279ee9e950c6986807868d8f489cd15102bac9d4667904539b. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZDA52471910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2ca7d195af2ecc260da0544e13daf6bfa7558ef745aaebb4076a95bbe3b7e4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN32475522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f07f3f4370d6fbb96c6f6a4d4bac13a151f97ede76e8ea09e07443631ae195. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:17:44Z), 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/QZPLS2405350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18a82e9ed59068ecf4813bdb9c8ca8a776e688457eda45000f29f6360ee8fea. 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/QZNWZ2435990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319a1b883b861be95c473ed13728d6a9b31ec064f7b4bd58021efd9324230e41. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZWFT2483331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361d5abd919de7be931e0ee319580d29850162751fba72685344e257f769f1bf. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ7T2417373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3f9b77dd047d5b8006b7a5834398b626f53e86e2096776a8a59c00f349b2cd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6Q2597392.