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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0023d668129d1795709b4a4a6962bccbef99755a1db4ed79b0c42bb12d8af5f4. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe40de2e-a978-48e4-87ca-76dc2db024c8.json and https://artists.proofprofile.net/proofs/artist/fe40de2e-a978-48e4-87ca-76dc2db024c8.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776d0bc9dbf09988ae1896c05dbe2620b34af2358ed29c918d8e06564a635f7f. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/US54H0312306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b3afcae79902b28f4982cdeb64ffa68fbc7ed915085a4e9a689c5d6e2e97b6. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/US54H0312307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd39fcef582e82538741d49f9b7ed911a91af07d04c688b4050d65afe0e87ca0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:40:07Z), 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/US54H0312308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14286ee9f2838e01003f9c906834ab4e01e46bfc29ebafb8422f8c59526b5113. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/US54H0312309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae02f8489e9e21a31b7565505e94f8767627661f75dc4e9e3133dcc9e298cf2. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/US54H0312310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2895a2ae963ba5cd9ce215a80c2a5c8c97572d4b863235913a4a4db522bd4fca. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/US54H0312311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f0e9718055c4f65404563639e99c1f716ed01d9c6a40af96ba6cb570e4c569. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/US54H0312313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb08ad0b5982af81d5cbfbc4f90d8a3dc5d1d60ea73237281b7efb303c7e2e51. 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/US54H0312314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492ac0e62ab37f03d7bb32704e87af74c0093d724f4434f9431fc681adcdcf66. 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/US54H0312315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c982bfa85eb0a28cbc235124359ee18db6348c17dd7667c4bf176748a3be1d. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/US54H0312318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdf74da29e68e3e87e1ac26167930da05da32902559b062bd58519715fc8174. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/US54H0312320.