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 0xf3dc083f4737861b97cdff4270c52c61508c8455bc46ece11a3d0c7e37d0cc11. 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/c2de3f1e-67c1-4fa9-ba2d-8186010dab15.json and https://artists.proofprofile.net/proofs/artist/c2de3f1e-67c1-4fa9-ba2d-8186010dab15.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 0x42dfbf4be26b201e47f226db7cab1d84e55776a69e4ca61b62311e7db4b7d53b. 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/QZNWQ2432750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787c66bda99c8fc39c8af8acc0421f16fb72853e913c7b0a9f25379d6185041b. 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/QZTAS2491734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f0e138cb86e07d579e5e5d472c2080e55805793de21d9415e80a0751401ccd. 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/QZTAX2418392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a7c3ac17990d60b7f41a3d8072276c4f3f018e5a85b555cf2e76dd122c23ea. 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/QZWFR2433167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabd1bfaa8761231a18d6e1700d9bcc83aca9bc5febdd29a1a6efa37ce7caeaa. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZQAY2504425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e4ffab1978d24bae51d524fc9d0580f2ae7b9239748d2e68a14ebaf0fabfad. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:52:13Z), 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/QZTLA2571728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ef888f43d01f50093e5ca97b6b23d9951c9e039a7aa7170d08eec92817bd7f. 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/QZTLA2576675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc257e55098e1eabb910775f927cecb66e79629b24727cd184cecf0efbee62714. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZTL92558125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61400767d15901d09340c30e9e36bd08ab29a826b60140258ef3374a284c75d1. 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/QZFYZ2588253.