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 0xa18d50bc798b8469a2edf1b4212b67371ae0be48504982ee58e2a8b5fd66d81a. Chain 2 (Bitcoin): anchored in block 953888 (2026-06-16T04:55:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d099ebf-3bed-42e6-bc2b-ef37a56644a7.json and https://artists.proofprofile.net/proofs/artist/0d099ebf-3bed-42e6-bc2b-ef37a56644a7.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 0xef4800bf1411f623b4e63199ad9472fe1320d9e71fe17d967bc3a42ae754ca46. 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/UK6821653550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916b1dd23c007ffd3e23d7594bd7adb37fbe0e674f99cd82dbefc2fff4527610. 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/UK6821653552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb88dbd5ea4a3af98992f1d1a9e729c8a19bd20bdd1a02de03f77e427ad5c1a4. 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/UK6821653556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6a9b6da972afe181585dc56b8e8f82b2c5ce02d2254c6a3b7f613828870766. 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/UK6821653557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1137dd95c954775cac27f5f1f97a726373d77293b3811b3ad4e6fbf1c9770864. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UK6821653559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8d66da14de3be2120f1a88b054aa0509f825aa88eec96df9eb55d0c4b6fdd4. 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/UK6821653561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0de3b4a67181f00d42cf0a86adcfbe0e9960a5b26310ccfa5dafa83a1a6025d. 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/UK6821653564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6614d5a89225435a6b67d615e1cbf991b87548e6ac62727b80e9b16c5b8462. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/UK6821653565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37600b3ebbea38f46967bb4bd0489313afd94e6bcc4b1fe55fd33158dc1ae983. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/UK6821653566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012008481f79a0b2318904f756f7fe6696e6358a3733def5f5b130b64953d988. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UK6821653567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefca99b2a8d6529f5381f0439189c41d487458dc214637d3f08e878bffae4d3. 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/UK6821653568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded6325a4cecd080a0397b2c0ed99f00334254ce0e5997c46a5b059b3afa36b1. 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/UK6821653575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88453ed4d826f587dcc175ae2d946f25444f491835591d4dc4a338c8e6c9194. 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/UK6821653578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7561a274b08613bb521a1f06e6e86139e401f8cf55d7b051176aa4a753c6271. 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/UK6821653579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a13af3145e3cf5634f807ed23f6b0ab84484b60c801d9584d351a464f56f00. 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/UK6821653580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e12f65fa3e26f50bec5e06af5fc0d6a00db1c25d9ff8414ab342d96fe03247. 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/UK6821653583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47dd3bd620364cd941bd0f4cbc9934b8bbd7244a3601011f65cbb5ddf19e50b. 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/UK6821653588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd0828f931afdb3d2ee375f947bf2108b1668c4527adde8d34be38f3d0eb3f5. 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/UK6821653589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0439729ebb54e945dfdd2d94fb8b7be10504db22356470e74937951c4ab518. 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/UK6821653593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b2d034e751d3e68afa944ac8300b42875f33f6a908cc7a913d087d5d27ef59. 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/UK6821653595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1c61143b347c25fdbcf042611c5ecffb99b5dda47be68908284bed5049e96a. 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/UK6821803902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa605a40fb0e358d3fab15bbec993201c7b352ccf6d6dc734cd8b32dbf5498ad. 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/QM42K2059382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091fb65a7e59b1a137b59a4306d4eb09e5278ca874a75dbe5907ed46dd2cb443. 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/PLX971800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8c90d3b402b1a55cb2c0df9f38b6deaaecb14055b12875cf0dbf23d1f96478. 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/PLX971800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd368363815a4603fc5b475b42e2ed92dabf69b84e849d2dc31ffc6f96524ad82. 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/PLX971800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465f44206f7803fe6e8b98572bba4a6e80ae26972a428b374051c099f4266a70. 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/PLX971800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f63bd2da10c70b239f81dbdb557aa02d20a9fbee154887ae9c4420ed49464e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLX971800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597b21b906e827b399acd45d98aafad9fe2162db2e8bd24b9ccab85077ba2c28. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/PLX971800005.
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 0x856927b5cd273dafcb0c0fc0329fe02428f04de3acc24754ebacad0f9c98ca7f. 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/CAHQJ2488519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a05d6ad08fa6f5add3644b6a3a716cf2e28c81333b753116638b922fd6a052. 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/QZES52270340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12f74d68af93be6001b0b95311c88dae85433624f337845b520a5213ccc1296. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UST8K1861088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52affa05d69e45acdc086b94e4c966010c8438ecdf288dbb40cb0cbc7e4a8091. 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/UST8K1861084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd269b385b74d5c4979a3996b832cb3858675d7272dd6e41c298cabf4e6b7dab7. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/UST8K1861085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334dc5f23d3561ecb6f3eecca0a263069e471ad44a095797b62be47ecd194201. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/SEYOK1712564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8160bbbf803febdd355c393172fc77f9f7cb6d3c29b938179bb57f59939e07. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/SEYOK1712566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9285a97b32a1211e359617910f072253ea2fa72a2e14cd7e4d8a73c66597a21. 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/QZHNC2567126.