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 0x9ee66dd721e7e0545364bbfd996d7319332264ee80c484fdfb264fdd93e17b6e. 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/d6dfbc9c-0070-47b2-8bb6-aa2e37aad432.json and https://artists.proofprofile.net/proofs/artist/d6dfbc9c-0070-47b2-8bb6-aa2e37aad432.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 0xc36d79a8d3d9b785bff16cac8b7aa29ee701aba3c4ed9a1f8e94e30371e8e500. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USVH41300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4c7f8f3c944fe4a55aee40d12447e6e5a971870422a8b7f0f66e3ab7a7581a. 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/USVH41300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a49a4e330d34852d94d4fcbe217c062565d32eed615ee61b18c6d37e9da3521. 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/USVH41300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9fc16cbf0cf6f0db6aa27c24fc8cac667dba2ec1bf616f8972ba8733ee18af. 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/USVH41300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3c2dd02ae2120d2cef25a89e2d8bcafe141d3f44d48ea1ffd727ad3fab4f4d. 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/USVH41300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb0955834d4e649924cfc66c797813199cbca2aa2798c6704eb7f1eaa144b81. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USVH41300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb93f38acd60130f9d46c3924ac4044785e9e86fa4909b1df07d9b42eaca3b5. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:02:03Z), 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/USVH41300022.
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 0xd45aed582c9ae0cf3bed9c339f5ddc2d7d28da677029114e89b07311d6d12db0. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USVH41300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b9d481c373c496a07bd1191c7899f1c5b1e4e905df9bc20fd71d5fbf7a4751. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USVH41300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93770da4330a37a588cdd0af101e994793370ddfd164b0170030e93b2acedba9. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USVH41300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b257f4b5394eb0b9df5622f19dba7fcc56ed322a1a5c9a971477169ae49dab0. 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/USVH41300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa405a739acb267c4edb3216f4371c8f7a882245eb641b24f698611b0831f32f4. 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/USVH41300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa566e15b3204f12e518c8b677609dd80cd939c26b1e90cd371df6808bf2e07. 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/USVH41300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a0843bd877a4ef6dd3635a572c002ed456592c1f39b3b43ed7060fe61a598d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USVH41300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf459184db1409ee124a1e46ee9702c29b6e5850bd128377b7b90e3c6f538b53c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USVH41300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139c4c4f3f1889706fbc11b969c63011e96298f6bb33a256d5428e10442598f9. 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/USVH41300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c98452aaee8e2f95fc82e9c795070c684bd0087a7254dd703b9423431d4d97b. 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/USVH41300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad244d3335a55360f0c49f3266b1976d3ce4167604ef2a2a7a0dc708ceced8d9. 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/USVH41300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc8817a1a3c499eec168f3e28df852230e21ae1804dfb9a66331f15dc76f0e6. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USVH41300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70274ec3d9dee87f7dc08e1b64f89bf4e6aff103daa2b57db8d55c90b33e5b1f. 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/USVH41300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d983a1d9d15f20fc6e20ed9ae3d6616b83d2f3fdf63a16e07799f38eab7dddd. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USVH41300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96732e702be1c8f3d4c3478bfd9c9b8ad76a34c3d8c9acfbf2847b72a32584cc. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USVH41300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958c5bf48becca8faea91623460ebc400b2d31246366650c2dde5f122021b097. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USVH41300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfc13938d54eb764282b3f2ff2bfd1b319c9c0d933548fc5a71bc0750943e49. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USVH41300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ad414973d339a9a018589df093099c4abf3e428b41f4bb6ae3d9f4ef6a4e81. 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/USVH41300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054f0f3e959b45587b44d4df4a0d53a766297b691e9f0913b8dfba77b26979c1. 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/USVH41300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7786910dc61e71f281a3fba5fa6438622e2b16185aad86524dd5a2bb094237. 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/USVH41300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42a4a56cc29808f86151bfdebf646bd0a89285e6362a5648af8e16e3e32c0ca. 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/USVH41300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5bed67d88f13c1dde08fa3035b527d6bcb580e38e52ba2da81c691895f25b3. 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/USVH41300017.
Medley: When Youʻre Only Lonely / Will You Still Love Me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c35ba37b5a8b6160235aca1dd77aabc310cc6669da2931f82f98f1cf8052994. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USVH41300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fffa4d050ae08c5bce5da54b85aa8ed0258dbc88b097e79f453dfbcd5ae9c75. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USVH41300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4230f1d1db64d33bcfc7a1cc7c41dc7a73658704588a14fc2719cc18e16f61a1. 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/USHM82116134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8792bd2960300acc5784c3681d278c3fa7fc6d0106288209461752b9f3dff738. 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/USVH41900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2e28d9834e4df04c5f58a176cb582f6ca4f431ebdddcdc14626e566dbf6959. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBSMU6082085.