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 0x7af0a70cc6e80c5a7acf0913c260117be26e585f98b54e4c75b2613ab4bb07ec. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/250731de-a5f0-4374-a2c8-e9b7f70613df.json and https://artists.proofprofile.net/proofs/artist/250731de-a5f0-4374-a2c8-e9b7f70613df.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 0x84b9c3a3b2ba36025d76b0b547b86898814ede4f19f02af972c8cddddfa58fdf. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/SE5BU2443867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912bbe7d3b32a41559dc78b4170f2245f20186471bfa5d00823fbaee8bd6201f. 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/SE6HN2473480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5502923090bbcca859c2143a6241c18b39b776223374f7f3809f67bcad75380. 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/SE6QE2434912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc90907f494012240a2d05a7a039697bfbb9da3f1043d94232433ac8ca2fbe8. 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/SE6SA2435864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5e0fa5e14a87343104440480989abd0eaf8867abb6b9b7dfbad5b5115110cc. 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/SE6XW2418759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4a66a028b0d4061845480101a205730e1678a495c492c5c64f4d43bef303e9. 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/SE5BU2524122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24454fff2af91065df732ea24f093dc0f541f0e358964fd329996d0071a0a252. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:19:11Z), 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/SE5BU2546507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4a66a028b0d4061845480101a205730e1678a495c492c5c64f4d43bef303e9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE5BU2524122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24454fff2af91065df732ea24f093dc0f541f0e358964fd329996d0071a0a252. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/SE5BU2546507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5e0fa5e14a87343104440480989abd0eaf8867abb6b9b7dfbad5b5115110cc. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SE6XW2418759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44cf47607304014fabf5c3b204bde479976d1e30aa612ffeca5376bddfd6076. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:23:08Z), 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/SE5BU2570154.