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 0x5b9056a4bf9e6e7d6d8d50dcb16afc139c7f0fb2c970beb8532110163edce947. 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/97b70619-0d61-4e89-b5b6-5d00dcc8959d.json and https://artists.proofprofile.net/proofs/artist/97b70619-0d61-4e89-b5b6-5d00dcc8959d.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 0x434545e67e509c9075a0a4105e94a284de67e44c7ab07f1ccd85594ac94ff252. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FINT32000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0a0ba5c7b0a2b0d68c29890ec220e43c7e087bb80748c1efe69aff32eb49ca. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/FINT32000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d22a58338a65e64c2bb2f222e9254685f3da282b3c366e08a885dbcdafc56d4. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/FINT32000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3f0f24f915468d0379c5c238a34df1c813ffc711c0aa6d50399ec2d8888505. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FINT32000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a382311a371d12c6ec6818408e31372ac071e7bac3875511a443d04a835f181. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FINT32000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf6ebc166c1dab6889dff61c8094cdaa35e59ad492c69f232d73fcd33debb72. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FIA3B2100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36531d0ebd78b41e68a658eecb84fe663831c5b65b9fb128c8c875d7912641c6. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FIA3B2100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0ef98284e861105c51baf9d486f2dc8e9f2873daa63caf5ecd0adb5a6d8f23. 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/FIA3B2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd1468b9fb267d7b6613ceb890f18cd91989c0bde56b87d47f8447b0618de9d. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/FIA3B2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc303e27d0d6b6c25b33172f280e5d92446d1e0f59c3a223bc445494cfb0c56. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/FIA3B2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cf7544464dd81a73a83ebcfa1aebdcd2f9ce0a3a8c77ebc2351a5491b8ec46. 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/FIA3B2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe973d4e2d3d1f8d35a910aca900bbb96a276939cbf80d3a7561e562ed13f961b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FIA3B2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c69880030cef7629906bbc442a1eb1c11661fd8fdce438679cb2b602eeb093. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/FIA3B2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c8852498e8600bda84001d02a05db3ceb9642a50daa00a28b6b05c8ee3d9cb. 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/FIA3B2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4885425def23cedabe9b46754a8bee1f3165eb8cbd9768fd39304c65d3c1d198. 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/FIA3B2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226cd6f096eec2f11a6a8fb2cce8af3511243d92b93331ba18704ed65af6a3fb. 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/FIA3B2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55fc4f369c3ef84462e10b684120b2f027d58a9ad7d5de5bcf5fddd5911cfac. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FIA3B2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc50dee324592431555f0649deb98df8cd303b937ad9606b9d763d3705f8ded. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/FIA3B2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272a637925c765d4ad1a31f171c8aa7f9ad11903d11c6ac6a0eb153a66b76d94. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FIA3B2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7a51b33ff25ce7f72e07f5c58089bf66f56ff6b2e1593266cc6bc2d97d25d9. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/FIA3B2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9a9a1f72bd484a4b941b30257f95aca7d2a9c26a83a9fee0faf33d4f03a1c5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FIA3B2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdf99b21b58555b3858dda3ad34d828fa212075cbaee9b7d98d6095bb9b330f. 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/FIA3B2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c63421e8120b0d89956715898e46fc2224fb1efc6eb39bb1f41b9b30236428b. 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/FIA3B2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7ee2d7fd6a2d10e9d580cdf51d235b1b831cc50667a4a8f82d89d841adcf78. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/FIA3B2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f40928eb95b752dfdd6a6ca01591cca9b16b67402ac54f3470ed12930201a08. 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/FIA3B2200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea44f68a078d9a53c3417d4d1d15d984be2efdf7b2cd2555a3ededa51b7a08ac. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/FIA3B2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84afb44ef2b96beef9c3eeb72f0044f19a47ae2a161321512df11f2dc6c5a0b3. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/FIA3B2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa260562eb887be682b94ef75bee953f1f59f5c372225d5bc5b64d5e6ae01dc18. 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/FIA3B2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbc8ddea2a8065b84c6cba065d25ab84c7e00be0e3e7e072a0a01de6163ad7e. 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/FIA3B2200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b1fe49608b2f3396f07513c52d2193eb44defd4e9039a9c1dd147259b6d97f. 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/FIA3B2200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e98133c5e47357068225c596d45deda7e2d553f33ac7272806644e04ea8125. 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/FIA3B2200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6d01613cd8f8ba0061644e115169bbfe41af39e4cc1a9de52a9de1416d8de0. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/FIA3B2200027.