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 0x6f980dd36d62fe92fe05ef50b1c3e5ebce2fd3bdd5be691a13ba4e2ba513e56b. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb40b8e6-947f-4477-a57a-7727a0a7a910.json and https://artists.proofprofile.net/proofs/artist/bb40b8e6-947f-4477-a57a-7727a0a7a910.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 0x8f8f5f9e5b85665e9c74cbd078bfec740179b032540e13d111ebba0adf3a43c9. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZFZ72436784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e307343a0417b5f0ed67ef06d615bcc8c90d2722f34b6c5aaf4a0bacf3d0975. 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/QZFZ72436785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8eb9a36ea891615cf364ac04896b69a18092f13aaec0dc8a0f21529277bf7fb. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:54:51Z), 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/QZFZ72436821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea68a782e4f05d5734f2c34eb322e179bb7a8ed57d064a8e7437ea110bd5ca4. 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/QZFZ72436824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2a45480cc88aa6c2c7e668e5b7d7f5c56f887f48513eb6759233706883f429. 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/QZFZ72436826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6430faa7c1ca27e0b959145d90698275b27e84d7fbdd5bff2714b1e92c5b4f3c. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:46:56Z), 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/QZFZ72436829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c849d3e25fbb5f132749fa0cefd99169bedfe3abd33de65debe7ab7e009cc0. 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/QZFZ72436831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91aca156d7480a23923bf5a12f466cc5f29dbec3f9079ed68eb3f87f848b329. 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/QZFZ72436833.