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 0xb758542267458aaf2fbcde05814baf37126ca46078e16c0f43aaeda14a322768. Chain 2 (Bitcoin): anchored in block 954063 (2026-06-17T07:49:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46231d41-5004-442e-a403-9b39cb801ce5.json and https://artists.proofprofile.net/proofs/artist/46231d41-5004-442e-a403-9b39cb801ce5.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 0x974a6ab154600203957f69b4735599ada9f2dd23691747fecc252c2449298348. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZPEW2510067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd62c1438d78adf4f934caa5429fa2ba98801a801bbfd2e92ff217a709e9cad. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZPEW2510073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7d632ac1ce83f0788495ca9de692f63cd05e689e92e4dadb0c6922fd72f96f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN92497054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb441573ee456a45f6c4ef10c129c80d0cc48bab40b488d75eb9d2e15b021a344. 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/QZPEW2510064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d26483b95b9d2e59ce7e1f795bf2c9088a192015860789725315bc9fe580f2b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZPEW2510065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeedffe89fa5e63e7f4d5971d26dd215f18c0f1dd1c3bea9c645fbf086ac4b9e. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZPEW2510070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefeabf97276cf0d81e4a834383703954e43c566da7039a73ec17f227ce653c3f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZPEW2510071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd62c1438d78adf4f934caa5429fa2ba98801a801bbfd2e92ff217a709e9cad. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZPEW2510073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a8a399198b38170f898f7a369f655adeaeeb7731f6dce352583dcf48be8db5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTB92571538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02f4b632ebba901c6ad2a866ba1f4478e82bc4b6bb02ba7c17c331431077a02. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:22:03Z), 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/QZWFV2558372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ab372bd6cb69724e7b6411c5f4966fead704c76cc710f657ccd4e7e9c50aa8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFV2562537.