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 0xef3f04b7b05ce13237a2ff8c794df335fd03479e9b573ed041fe630a382a61b3. 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/bbf6023d-e459-4401-8f3f-94a7d3738f4e.json and https://artists.proofprofile.net/proofs/artist/bbf6023d-e459-4401-8f3f-94a7d3738f4e.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 0x7519ff4736571d46adfe45c09ce15b348ba46a4ba29e123e630a24a5d28aef53. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USHM81200803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8e1177cd28f632354f7a55e30a96393d3fbd1450aa2cf40075361b6d4294a9. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USHM81200804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa13b7d5a8439375f05f91d409d1f07e69db8abf355278a42c03e02ddcc9459. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USHM81200806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55ae6feee6b0cea9b1f799686ec7fd922e8142576367ba73c163810be2d41d4. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/USHM81200808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08677489c53ff2bb17d8d222c51b90a3e7e5da756648f8a0e1bad5bff57ad61e. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:47:47Z), 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/USHM21214831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835519c4e87f9e7c333d4a522e6b51aa86f1fecb1216d9630593981a8a7b6072. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USHM21214833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aee1213c6b2945a38b6e0ae9e5cd8ea46dc947499c16adcf2ba5bf9c3cd190f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USHM21214836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36772dfecf13c0a9948ff182c0172fc4596871bc5c1556ede6e7d27433542f44. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USHM21214839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078940811de6d37a1f121abf738d414d889b4b7e4bf76b59457dda39c8e4a756. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:59:40Z), 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/USHM91230563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5444bd255677f70bb2a9c8bf76b8da0c69bdf34deb2191abf0e2f3d106b7a6fa. 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/USHM91230564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe23191251fc598633be26654649acb2f533bd497f92348333190e6b390c6373. 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/USHM91230568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf5aaa3e077412df085d3ff87dfc46d80e4dc3600f2d9288eab2e164be9dda9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USHM91230573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b8e9d7f2955b4d36f3411db218f19b381ce23f028989a822962f20aa8ad2d0. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USHM91230579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1998b396976c77077a7b65ffa820e400843dd1f09903c96e3e85e6e7c83b22f. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:34:44Z), 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/USHM91230583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ffbc24a7ca1c23ca68570e7307b62a45db4ceaef38d87b87f553ecf422c593. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:22:52Z), 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/USHM91230554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7a01d0485130b89d9c7b02b5bb624995e456ec30871240b73f8a21fb05d71b. 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/USHM91230559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416541b64e1c20ff02e83680a4ae47a3af3116154ae2f8c4ef4a2bfabaacd904. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USHM91440268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbde31f3e2865dce7e3d1eb870b66165dc5acbf92da085c761599ef6a8d5764. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM91440276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d544885cce6681cb0c93109f35ec776c401d6f3d015d00f96b12d4c073b053. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCGH1687685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3818e5438358b5e4b541726008eb21969cf384651819c86311bdb531cfd8540. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USCGH2342509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6dc9664de2323e210bef62b091c44f7f9adc595887b781934d06e82c9c57c4. 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/QZK6F2448169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abf6709029812c014ec5b84e09a98fb3582763e989d73d3c402832984656e84. 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/USL4Q2487682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7d7b115af94eb83f8994b39fd43283fe312519ed8ac23ac24c529c90a93cff. 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/USDY42025900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe7c2051cd0dd8ba03b010f1032c5c5292618445c11f786323111f153b3f9c2. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USL4Q2474585.
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