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 0xcbadcb8bcd91c8ed2dee54261efd3ad1e0ee599f834e0e8d3174ef975a868090. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1f1f90d-ba71-47e6-ab83-a8bd62b2183e.json and https://artists.proofprofile.net/proofs/artist/f1f1f90d-ba71-47e6-ab83-a8bd62b2183e.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 0x40e77190e27846a87c604e45b04c9021d4482dbf4c0e14615f1f3ec33a2be837. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SEYOK1605670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06819e03f5797406d464c203d3cadeee45410332bbe0db4ba77fb199b32e4862. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/SEYOK1759395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d38f57a1b6600f4a455f09a1df49c566f40a1b11af6ff58b7dbf2c4759d7510. 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/SEYOK1840346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300e1d1f4355b8196fcfefd52612094c113e837afc7dbb788ccd34c50adad5e7. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/SEYOK1852947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2559be3c52c68635d602b128c7d069826116ff2d90e78206c365db2e3f9902f1. 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/SEYOK1526606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8f754ee41773e665defa7a7532499f469780ca87db64c06e82cb6f02803f47. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/SEYOK1837941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf196709a3a7a96ab5f718fdebe122b3ad01ac332bd3daafeb6afffbecb1977b7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SEYOK1605079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41e303968f32446416f5b9ac43adf08e4cba017bad7fe1b370bea77008b76d7. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/SEYOK1420041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7d07007c9a346bb54ae8db509e53ae75ccbd8205333a4fb044e5f03a2bacdd. 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/SEYOK1610286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaedd300a35451946eb7ff8d1d38c334fa19b1d58514cf7971b4b909ddd3d51f. 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/SEYOK1840345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ace1417cc40ad1a0d5b48ba07ac5e51aa35b311df55999954e1305fb0f673b6. 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/SEYOK1708034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c2f1c4b2356adcf9d8de6525c536f6a17ea98f6642ebf3836463dd0c7a1660. 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/SEYOK1619469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5524dfe4f4f05604284494c296921898b51763ca828c3ea7df44bc2585a1edb3. 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/SEYOK1704504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d955f2c20a7dcee36b2ca714251a35f8a3d91b81863b3825fbf1988a009a76. 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/SEYOK1837430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc538d28b2e39bde7b702c1a44f2d7978a54c72fafe7e8b1248dcb04bf4b8d1ed. 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/SEYOK1837434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0ca6dc395aa5b1676da1000184d27ca00872dc0f612f013700dcd19e4e196b. 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/SEYOK1714995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5adae40da66973e3cddba1a1899868d45d5b82f0ab74b1995e402953b06a3b69. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/SEYOK1524070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad5912ebbfd058dc689385330556082408b9015c79090cad9dc394ac7c8c63d. 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/SEYOK1649426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc820f33ca3d86786d31bb440ece3ec7cd3da89900681a95927d4bf317ef17c0a. 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/SEYOK1406543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11b4a58950a088e6917cb3c846c6a7785222894ae51516de0f198979b5048e0. 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/SEYOK1413813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8a3535b0cffda803cbf50ed9abbc184e6dd6bec341578f21c388d32b23b41a. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/SEYOK1538877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64799e077331e06f9979fef37c3124ff1fb044474503a6948e8731a977e7d9b0. 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/SEYOK1626222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c4b873d34c9ee977d4675306e961e154f7b36b408a4e2b37268877507e1707. 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/SEYOK1807969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a885a345e0e1434b1d9b559e64bf25b18af078e5e4b405fa7f8593d881c3343. 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/SEYOK1710774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9783383a2f7c2fb2ee3731ac73d71391a8789ebc49a1d470e6d4abee7237978. 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/SEYOK1606560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2f85c82654c25b636428de2ec6a148a925191b735181d25ba4fdf06dc2ffb3. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/SEYOK1516336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad5912ebbfd058dc689385330556082408b9015c79090cad9dc394ac7c8c63d. 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/SEYOK1649426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60778335265a6876116aa41b15341042f4b5af0195add5fb25bf8511cabb9aba. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SEYOK1649427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332b8c67f9219ee678bc56cdd5d32418df726e137f1a5e1e7e2bdd8413f57bb2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SEYOK1520922.