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 0xa658a7825a26db27a1b387e552d95547d36bd97e67b754bf1b90d6f8b437211e. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a163032-4655-4327-bafc-46b5b66e0a6a.json and https://artists.proofprofile.net/proofs/artist/9a163032-4655-4327-bafc-46b5b66e0a6a.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 0x4cd38a45eed7611ba6c4472856f52cbd16edce448ee5b846183a6c8e30c767fb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DE1EJ2402966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d8b275de01543de39cd9108d013c627ef6cb5d88b21a595c16a27348a914c0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DE1EJ2402970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea0037bf78df0e66b0488bb4433cae5d4c9532bee110889796569e41c450104. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DE1EJ2402971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3deac9b912877b42b791bf1f1b7e5ada16589c75c71d13994d2f1a656c7ba0f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DE1EJ2402973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9af4031f3710e9d7337efbfb9775ac59763f5b42eaf7be02ba998994eab3f45. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DE1EJ2402979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadae1d357a558e717fe794ddef1362dca4e563000f874047a685285cfbf3bf33. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DE1EJ2402986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a562cd778fbf2a1a5fb0cf409ba38572be87322cfc9b3f1dc508879f604e44. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DE1EJ2402987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb3afdee5875406fefd5d5e3d98003ad898f27a292dced3e36f3dd409ef01f3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DE1EJ2402988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7fa4b662b56f22caa365d33d9a940018fea7b66390454c738284f02e01e0a4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DE1EJ2402992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb544bb3e67034dd08caa9f50b1c5dcdbdeece949efebd5cd496d1aca31b484b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DE1EJ2402993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9b110aa24419a373f141818a336348c585ac8476629d8ec6ec94d08752b1e4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DE1EJ2402995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6401803b257030d7ffffd540ce11a649edf70b91242221df804bc31e343ead6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DE1EJ2402998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7035f14bb1e0167166e97a83f2c54d5f94a5c18ddd642fe23a1de0999261ff. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DE1EJ2402961.
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 0x740178b1766765737e53d9bb6e18397d5497491b9916491fd00847f64e196526. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DE1EJ2402962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcc40c9c0d7e199e9f1f76fffa8f35b1ef855cc6f2b242111252810a33e8d5e. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DE1EJ2402963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587fe00c4da649cb39ff3bb4cc1a30035a9d2a0b7a6a78e9e9990f955469c5db. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DE1EJ2402964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7b0d4ab3e75ca3a9c1d4440f70b4850c862e0dc8cc61a12ad475a3cdc7b0d9. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DE1EJ2402965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06f6a6957cb52bf18d5345534a3ae60090254fc2a293d5b64b97f9cdc7e5713. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/DE1EJ2402967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67d791ea4ba07945228c0466ccc3a9cdf8de4c845ce3d09ea2bd2eade36cc67. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/DE1EJ2402968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc372c7f9db4b44f177e78c9173bd4def58149903b6d1fe61a146dfdbba508b37. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DE1EJ2402969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943ad05602d3b97731e74fa2af00f2a8d73f212d7bdb7ce6062d05a9fb82e813. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DE1EJ2402972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08ca1163ed03a721f19e038d328a599a47963938eb4dab249d993c39a4baf61. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DE1EJ2402974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5feb882f4ac7ac278cdc98c3202467c2dd44e6a696025dab58ddcc70d6b7220e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DE1EJ2402975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f12a00cde50e9e0e0f464fa806892921893e4b6d51de09d506b0bec29c6547. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DE1EJ2402976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ed6c943f4454dd2f6797c109ca687bc5a1fddb4b8c3c1f3dbafb00cee822c8. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DE1EJ2402977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ced6e19482021c1c5ca21e005332175ece9cfed2f507e84eea5d75830bcb167. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DE1EJ2402978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9250de97c0db438784d6d923093a85178b8ff222fae2cdfc0afe0a28a2455f3f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DE1EJ2402980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7888f5efe4ccd21db954f6b1ea2a2ef3deea647b938507d1e84802cfdc9f975e. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DE1EJ2402981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda19cd842dacfd1dcc9200096cbeadd56ea1f4d457ff68ae0d0e1d225aa6f90. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DE1EJ2402982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d10d2b9329cb8c41efb2177904037178809b449053670c15bb891b0202f014a. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/DE1EJ2402983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35b71ae8a6b575534210f1249e61b04a1ae9ee3163c8769480f9d15b2ee53b2. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DE1EJ2402984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67685b0f4802933f6d5acf646517809f4b0954c8bc8999beec2315d7b4dafa02. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DE1EJ2402985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8420ae6352419384cc9c6002cf517ae958018c3d01aaca681828194815a48c. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/DE1EJ2402989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd05b73cf83ef47df2090dbffd22bae31877603af5c141844fa4493f42cd1a7. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DE1EJ2402990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00c07c6bcec270bd8fca84a6a74afc51657021d5fc5cb6b15eb664146ebf3b9. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DE1EJ2402991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42019218f3398f507afa72fd81c0daf7d6cb82e7aaa93e9367c40a3351237d78. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DE1EJ2402994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ce4171592d96eab1b4adba49bbcaee2050f44d331fe63c821da19b46541c58. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DE1EJ2402996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87502595dd6ce0f33050901648cdd5c4acc32140e0a117cfd129735b734ef08b. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DE1EJ2402997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b7d6921934ddc5d082b1fd3dccaa1d8f15e7a70f449049c4b7907ef65cf3c1. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DE1EJ2402999.