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 0x4b205c9fd8d1ef5af32640d38e67bd06e134e852033fc59dc4449cd19faafe0d. 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/9282ec1a-0096-4eb2-bfe9-99e6c4faf0b9.json and https://artists.proofprofile.net/proofs/artist/9282ec1a-0096-4eb2-bfe9-99e6c4faf0b9.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 0xc538e8cf284f49117467868dc441cfa0921a72454c598eb2473a76381ef772c9. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CAADO1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91d3bdf52bc06ce52cbb0d2736b1c9dc1fa32bc57fb3895ceb8cb6dcc951fea. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAADO1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232bd3e3c8d3387e52c0f9dc8741070c29c914710e0a96ba88136fac61a6bb44. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/CAADO1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9bce0f959fb1a0d7ed930d61aa5966e9e2107bb65fee96346ba373aa1e3fb7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CAADO1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635e19fa19deb06dbf38f3d692cebc1cf6f66ada31c98e64bf6a36ac83a7807a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/CAADO1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232bd3e3c8d3387e52c0f9dc8741070c29c914710e0a96ba88136fac61a6bb44. 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/CAADO1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8681b42c2054867db59b80b15d43dcde2e4202d5d1b0ea95ca33999c9f4643d4. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CAADO1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544d5d6b9c2124b8abeeb7882cbe32157b49e0fd133254d95784947653e51420. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CAADO1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aaf96b0229179739da6f68ab9aa89cdda592f3d80bff9a0922caa6a77252f59. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CAADO1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953b615e034e530a57c5d9f9d748b6a9ee4599e3fb35744e8f8f403caf79ee9e. 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/CAADO1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8928bbb4d2608f93b1dc4d346a80b68f6380b5908e6b27c333a01aa1ffcb0e16. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/CAADO1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ab3cbe7552d81539c3430a2e03103fa8a0e752447f5b842ea61711e710f5b9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:51:38Z), 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/CAADO1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b208de9d67142e1eee0389d3793ea7d634fc42620685a40c9323732e576dee. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:32:28Z), 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/CAADO1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa610dfd55f391855ad7449750bba1436aa604635c9032245bdc633d7521ac01c. 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/CAADO1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f2450d4bce89cbd7f58809c1e99d1ec4525ba001b61119433bec11bb7855d6. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/CAADO1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953b615e034e530a57c5d9f9d748b6a9ee4599e3fb35744e8f8f403caf79ee9e. 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/CAADO1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8928bbb4d2608f93b1dc4d346a80b68f6380b5908e6b27c333a01aa1ffcb0e16. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/CAADO1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958501b8b4725025d26ad94d945a9ad46841dce75f43c18110543cccd67f366c. 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/CAADO1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd273f8c1a297f792e00447b3442917c9595d16f19bfb5c549bd05a65571f7be1. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:32:00Z), 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/CAADO1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b208de9d67142e1eee0389d3793ea7d634fc42620685a40c9323732e576dee. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/CAADO1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa610dfd55f391855ad7449750bba1436aa604635c9032245bdc633d7521ac01c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAADO1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd622274f4ce499bc99d28f84ffba8c77b0f000529cf0c1d29f7c9268ea22e6. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/CAADO1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec297761f9b78d47c002926a69a9a89757651d84c8f92f1056f06eb19c174ef9. 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/QM4TW2199645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb17f51e9efca9a7efc8d4622a08428a7d7d622f43522d9b224bc18555561ac9. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QM4TW2199646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe604b233b85db58611f2d59e939ab14ed21c3f6251b4b00ba479fe58662368f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM4TW2199647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0a26a8e3fe66157e911da4bd115e0f221791905549a21512e64a5e67fda6c5. 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/QM4TW2199648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb787f2b7664322d16f52a1f1de19d399d7bb6695066af737323c7710c717b18. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:46:33Z), 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/QM4TW2199649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85800d7973c5fd71960342ee59421ab6767c8ffbb2d5bca05587799f0bc67203. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM4TW2199650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b61a378d33cc66a9b1ea9d36765ea642af222ab3be8d69c54fc02946c21602b. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QM4TW2199651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec297761f9b78d47c002926a69a9a89757651d84c8f92f1056f06eb19c174ef9. 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/QM4TW2199645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb17f51e9efca9a7efc8d4622a08428a7d7d622f43522d9b224bc18555561ac9. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QM4TW2199646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe604b233b85db58611f2d59e939ab14ed21c3f6251b4b00ba479fe58662368f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:00:47Z), 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/QM4TW2199647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85800d7973c5fd71960342ee59421ab6767c8ffbb2d5bca05587799f0bc67203. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:44:51Z), 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/QM4TW2199650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a5df3d1108f139f9c51c1600faf8429471c9668d3bc831b380872d8b405304. 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/CANOA2000004.