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 0x9200dd75643f2dcec3e904b3255e69d527a9e37cc3c110e81c2b36733d9bbc50. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2f8b97e-a055-4687-92c6-91f16f25993a.json and https://artists.proofprofile.net/proofs/artist/a2f8b97e-a055-4687-92c6-91f16f25993a.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 0x247d80a5bb7ff4504c361d41e4185ac866df01242dc1ad0fcd644c0e8f7adb7c. 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/QZTB22575468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbda2f47e41ea03f4d8b21d14b044b11ab241b18e17603557a3721e05e78823. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTBC2545127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e1f10bbbd61a555a0ca7fa82ee692f908edfb3f4f7b639bc8fe9e2d523140d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTBC2545128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5835fd0b2a19c12a79d2ee60a94ef77ee7eecb70a6137df243d21542ebd048d. 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/QZTBC2545129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45619d1f49c4c29a9441c1772355f24ff554f232d0f562a70becf5f09fb9ffb9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTBC2545130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0553fea1b1068f29c616808f47f729c161a8b23df37dca3116fd93eb7f18a8. 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/QZTBC2545131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5354f6ebd26b112279bd3e91157463b69d470d9a624dbc31a0587131d93841e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTBC2545132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58b41e0e4e8466b1508ffb400f99d993eb1a00325d7e9d888c6810c01bdc122. 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/QZWFE2576557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bee425fe8412e9267019bf680b588f418063e3205e4e6c2e61165e9e4fbcf1. 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/QZWFE2576558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24549069fd1e66b3675082cbfffd2699d4407929aaf6c9560ab9f12dce57efd2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFE2576559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5f6670909e6e263d6944c19d32d3cff23134966bfc8d3f902ac6fa09485c10. 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/QZWFE2576560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eee6382f658b2bb76d6469852ec3f027dd3d6c0f262931bec5dd21e411fe329. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZWFE2576561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbd5e9c08f3eccbf29776672832e664b6881932d0adbb3a5cf02c8cd42caf32. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZWFE2576562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3876717bfc4f2712718b826e0b102033133cc97682938e40fa681a2faeb1da. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFK2517610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd2afff32864d0a0087b51e6faf147ad0aa6ce49aa2e00984bdbf9e0e05a707. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZZ7P2547477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c464fef8a0098fb8425822a9c289a48a15bc1bbdb87d9bc487ffefba6503e7. 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/QZZ7U2574172.