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 0x3c736ac2471759725083a573c0c2a2d3d547ab157f5f4fd8872ab8b471785906. 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/028bab02-cb96-4c5d-99f3-3a1062936fa7.json and https://artists.proofprofile.net/proofs/artist/028bab02-cb96-4c5d-99f3-3a1062936fa7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A.B. Quintanilla III Presents Kumbia Kings Greatest Hits "Album Versions"
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 0xff4d33682fb1ab7d1217aa9555c5392cdd5706ad966a4bd99cf8a8580b74be73. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USEL10400300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5850ff065f4cb0e83187467b8257de631c113dfc4cd928f221d4f377af3928. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USEL10400288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664f26934db87d3c6b79957d3b3cb9b228b3dc4968d9a89968c2c13e68f5b681. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USEL10400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09df65d6ae6a687ba29fe4b94a4e62535b2afd70ba246cdf0eb272668e6d4911. 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/USEL10600047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de2e0ecc7db901b3a6910939747f0bba63dbb451375e2b64db2c64a4cbc3bf2. 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/USEL10300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a15d426f73d8df376c73ef05f067d48f5e8837ee02b3ada0566a9e0d77664a4. 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/USEL10300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf902bdd02897fd34cfb4e814a3a22ee41e7d0fe679c1dd7385c9a4d65b72171c. 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/USEL10100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1352a59d42a780097ebbaf2c95181d18de8806dca1a194855d2944b4cede74. 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/USEL10200234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9856bfc4d67a2bc9c5560ebb82257aa6e774072da79f674e62429f6c5f89cd6c. 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/USEL19900116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c49d798a7f68a380168589ca5c09855e6694f77d5e4d8a8dde5dacd1ec41a1. 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/USEL19900113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c033216dd1c7bd0acb8ca981ae2648d59e9bc6aa19163c38d32cf0a83ac01e. 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/USEL10100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29b7a6e0d8b8fc3fe4ac4182e35886f5f2f590dc18d7abeacdb9ac14ff9eeb2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USEL19000651.
A.B. Quintanilla III & Kumbia Kumbia Kings Present The Duets
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69caf1ec4d90e913029b749f5af3fd932a15d5b86c7eaa0a539624153cf1bb6b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USEL10500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86579aefcdca863ef43f34cdfb919876027c2f83fe2c76e7b001dba07d2a883f. 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/USEL10500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a15d426f73d8df376c73ef05f067d48f5e8837ee02b3ada0566a9e0d77664a4. 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/USEL10300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda9acadd94c6d252632ec6b38d7607005f7e7052ba1447bdea33cc14d346f33. 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/USEL19900112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de2e0ecc7db901b3a6910939747f0bba63dbb451375e2b64db2c64a4cbc3bf2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USEL10300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ce65fdcc204f89fbb7635f40a8e544c785c4edaf56ec748eab85b12477544b. 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/USEL19900118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003c50532fe4cdfd407afbc71a4495b2494c30e6ef4c009de265e5bd3b99c84c. 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/USEL10300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac27a48eb7007ea037552d260e6c01b5d0f985f3ad2c6e2e117975e255f6106. 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/USEL19900115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c49d798a7f68a380168589ca5c09855e6694f77d5e4d8a8dde5dacd1ec41a1. 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/USEL19900113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664f26934db87d3c6b79957d3b3cb9b228b3dc4968d9a89968c2c13e68f5b681. 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/USEL10400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5850ff065f4cb0e83187467b8257de631c113dfc4cd928f221d4f377af3928. 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/USEL10400288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5850ff065f4cb0e83187467b8257de631c113dfc4cd928f221d4f377af3928. 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/USEL10400288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a228ea85e3318fca15d9eaaf282571246c0bea3ee4e47d34d0ec398424cb263. 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/MXF060200343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba692818854ece6a4f26a331a241fb7dc459025ea8c1c486cb708c2a1fd4add8. 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/USEL10300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c49919cbb09525e38b49db3364fe8a05d004b94685ed559c42fe2d1884855e3. 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/USEL10300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c15cc8e6b234b00c8fc84ad6b41c4e29765f6a7b681a145ccfb253f2492569. 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/USEL10300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bea6e5b13aa8e9c44daeb74c719d56d9dcf7e29012d1fe62d6339fef701c2a. 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/USEL10300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed9e0c76c62c267298372171f038255ebdabb88a75bf2d5c107e753d442a8fb. 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/USEL10300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ed37b35c19949fda52af948c6c529941f725be075df09fd19c5525afaea316. 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/USEL10300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd426e924411c5d481a3a2d19d7eae9ab85137a1162f9434201f9a44a2583ab45. 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/USEL10300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb7e404b1755f036c8fa7aebe060ccdbae2c15f2d81453a1df2059cca0eebd6. 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/USEL10300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47421dec1c6c9704040d274741dcffdffe27625c743564dddc5f8a749644078e. 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/USEL10300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5850ff065f4cb0e83187467b8257de631c113dfc4cd928f221d4f377af3928. 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/USEL10400288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664f26934db87d3c6b79957d3b3cb9b228b3dc4968d9a89968c2c13e68f5b681. 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/USEL10400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd9ee3c5b7dc739c2f870bf6a0c2b56f4c85e2921cdda2e0c8a241810d13e77. 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/USEL10400296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33a52ea003668d88d448465ed3f54ef8fb82f866eb640b9c47d83e1179a3748. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USEL10300040.
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