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 0x271e8650156897f1d08564182929694a176494d44e301ba7b14bce3f61f2bba4. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04601376-4c86-4c61-a103-8bc7547cd77c.json and https://artists.proofprofile.net/proofs/artist/04601376-4c86-4c61-a103-8bc7547cd77c.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 0x03c0ca024e5ad9cdc967158d39a6ac40e40082e7e4f350f4170078c2ad95f3c4. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:31:26Z), 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/QZHN62306224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7fc704e58a389d05121ee74392d3d450fa3721db702bbf48425d514c5c7e9c. 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/QZHN92595983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b83d656b58104b2fed450cad86e4b6bc8f4f6bc354939e132ce7ea0521dac5. 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/QZHN92584020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3560d4ca13aa51797a101af5e81a490787cd70a8cc18c9b4375faac51e2aefea. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZHNA2545100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34ff3d28c598e63a0f8265b89b309a3397fedc8cc9412f4a36e801ec06c0139. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZHN92598814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b7fad5ab3cbb80cf959b7f8ada9f848c283c2b221356d9524607eacfb9df23. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFV2457132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339dd3dab963fd4b8d22de9cbd2d5abee1b55e61918eff0e02b6f8a08d39c2bb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN82570382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1c77dc3da415c07348f5b3fa995dd182d61323c8ab2119ee9ebb369c406dcc. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZHNA2587719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6937ae6467dd45afc44935a070d6eb6558f96e74d09092b421a6b3cdb16e417. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZZ7N2521417.