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 0x513ea3201fe6739e592f8a2c71154fdb3913a86563cc70a1c3b588be5185402c. 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/67fd3d98-da57-4035-a91c-acb38e0fe592.json and https://artists.proofprofile.net/proofs/artist/67fd3d98-da57-4035-a91c-acb38e0fe592.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 0x779f3933db718a91685f1dcb1b432ddef2fafe12e6402e25000a477dfc605dae. 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/USMH92319581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd8841f38d99e0c38d447f2b9239b05df60b8a679fcadad19d59207cd3adc2b. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/USHM22310015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01dc1fa76181830f27f6dc992120cdc42ba8e52b46a76f04d6d655c76625180e. 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/USHM22310016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d17ea559786f3aa46c7ee6495c0e980ec2888b7f9a0a2867e437bbca38d782d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USHM22310017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453b5a289bcaf96259834a88fcecb39b8cbcca1ad391dfebe5d535379d8c0b4a. 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/USHM22310018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cd83a1fd76b93da4d7420e69212372d71c3678c64c0e51d2f9488e54fd459f. 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/USHM22310019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee89bf03aa7ab644a63dfd880d746d8ae3ef10a723e138ce92d92b35f0d444c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USHM22310020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d1af5f6a08a171fe1a95cb69095e0fab05946de94da879afd357b74bf16d53. 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/USHM22310021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a34a4bd4eb6666cf0adc26b3fb6b6acdc407f3c1f01ac9a2f38210e89c4eccd. 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/USCGH1852736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8343bcf67e84c9b8d3a03174fc5a3a4e3e3eb06e74035b865c9a78db26a674e. 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/USCGH1852737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3d5bcbd0cfda37c95b1299e61e0c2b15903476527efec13fdc1fd2154f9920. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:44:44Z), 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/USCGH1852739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651a35b7d82f69a60053066693b7b6f4bf0f2668a19ac5dbca0b539bde71490f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGH1852740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e9b0d30a75dfece9da10c5122596cf1d35c8b2296fc00beb2a48f3a04364b9. 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/USCGH1852741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeeeaf03da3b3053301a7b30b393f625f45fc7488819f8cf9914426063857528. 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/USCGH1852747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa8e79545d169f56d5c89854ce8dcc1581c70a26da9f86ea6352f1df1afc706. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USCGH1899296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e1ee8ad903dc642b50181c5c3f2fb45e126060fc45e0f984732e042ab08420. 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/USCGH1899298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7372a8f50f95533a89bb8fa52530e2b91a029d8930f8fd13c4248b3dcca505. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCGH1899299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84f83dcc6ee3c4dc797c5fda9b70dbed8e480bf9192f37788c4ae8252e759d1. 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/USCGH1899303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9be45a7d289fcf47529900ab5cdb6c8ea23870f28ee02d7ad6d75f70df11c2. 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/USCGH1899304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b765e26d72596535daade22d75e682168e134ae7c1f0c5e1c7e4c8d8e5ec52c. 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/USCGH1899305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75279ebb657566c8d8a74a3518566d2992df4fb679dd4d0f064304efdfaff1a7. 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/USCGH1899306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f89246016c1edc3561bad8a486f5f8f276ee2567241fbd25caca70546642b63. 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/USHM21768202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4fa1d8b1c6f999680afc5f484a67cf8f169c4d34a04d5693baf39fc24e05bc. 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/USHM21768203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75b1f56bc0a0e98f329467b87cbb05b42d4106a749bbf30d44b13086d1b4fa3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USHM21768204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa564cd415f83cfb7e67b8f2a4679299b0a8add1c9f87d187c7766b0c1aa539. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USHM21768205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6318e88fd06ddd69fda9e9c0695de60497c2382cf15afe03c6770d22ea65b524. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USHM21768206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda350268c9452097c2add821a69c0850137b421341959b5fc6b3bcf893876047. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USHM21768207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b22fc94308ae6795c04b96df0acc82c97383159d46935f654e535200c6bf0c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USHM21768208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60b244c07f1a588acf60b81028a4a9f2a738ca6165f84e4eb0f4c2a7790c443. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USHM21768209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c99fcb80022b3928ca2b9aa6652129b14511d954095c2d9801b3dc3640bce26. 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/USHM21768210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53c93195ccdc6cc006844db95a8e346985552aec0fd998596f010cb4fac72ff. 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/USHM21768211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f14433d5d399d019bb62ebe01ecaf4d91201c35cb13723969629cc10eb92d5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USHM21768212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823262efdda33ec9064fa8521a4c52c884a2c3dbfc5cb62a8778e4e3a23e7cd6. 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/USHM21768213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd1b09080fcf6eb1da65cb99d9bc8e2dbd0c853239aab43bf0af8e13f8ab861. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USHM21768214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5ed97eda7f7abe5b8fe82e5b613516372c3449773dd1df773c63104aa09eb9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USHM21768215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268e8fc00da88900eaa39b86899d9825c110c544e191870b31324ece1f38e803. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:47:07Z), 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/USDY42484894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63a10aa4c1e111e587a04cf4db2b6949f915e3bd5265b0d53ca26d28aa58651. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:22:50Z), 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/USDY42467059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cbe725d4e12fa16578a9f96d6571cc99cee69299ea7fbe82fb6e271b24a6a1. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:49:31Z), 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/USDY42419130.