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 0xa3b5efccd85a91d4f89ddbb657abcee0d2bebe736ad14d9b5448b1cf19218fe8. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/637bb6ea-3ba2-4c53-9583-13e703fe5eb2.json and https://artists.proofprofile.net/proofs/artist/637bb6ea-3ba2-4c53-9583-13e703fe5eb2.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 0x79f21441c79b8cca806d5c2210fdb15f553394929f9d98a578014b53d29ccf0f. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:31:30Z), 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/GBCE41800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61404f84a481ee56a76d7864b9255339e101cfc9ad8d499778efe366242d2bfd. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GBCE41900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a93ce56067851ab72edd378cea9903f538644bb916a54fb36a47cdaf92f97a. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/GBCE42000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b8bce73c3e0159906eb16b9fea36ba1ea92c67bfe337dfd69ce25442f41391. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:49:48Z), 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/GBCE42000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfdd267bd0d9207a4addb4b837638e6e5b393b36469ce0783dce61af55d1be2. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBCE42000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69d635ec561c73530c2f815891797df621e3822af41639cbc196fc7bf9ca917. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/GBCE42100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553096132d70e4a979c6257893673bd8dbb1477e4f6fc7c81728d82fdff20ed1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBCE42100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfdd267bd0d9207a4addb4b837638e6e5b393b36469ce0783dce61af55d1be2. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/GBCE42000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61404f84a481ee56a76d7864b9255339e101cfc9ad8d499778efe366242d2bfd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBCE41900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a93ce56067851ab72edd378cea9903f538644bb916a54fb36a47cdaf92f97a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBCE42000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b8bce73c3e0159906eb16b9fea36ba1ea92c67bfe337dfd69ce25442f41391. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBCE42000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f21441c79b8cca806d5c2210fdb15f553394929f9d98a578014b53d29ccf0f. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GBCE41800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9bd313421fa01b9ddc23775dc99afb4643156156d170d00b9b48cb009063de. 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/GBCE42400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca4da769818f03b5195c7349ff68b0c81d33f59e8cde2f3b1c4aae1d33a9477. 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/GBCE42300017.