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 0x1c8f5f133150a96c57b517927080c7d46eed4690d21bf0ca1b8a86aca29ae53c. 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/f7914081-240e-44e7-8509-a48a9d160f27.json and https://artists.proofprofile.net/proofs/artist/f7914081-240e-44e7-8509-a48a9d160f27.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 0x2c38d057b68bc478e44ecc0087b83c54d7a2fc11933dfb3c46c8183621e70ad1. 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/FRX452007162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49d3a3916470e41fda31e5efcdeb0cad838304e72fe479bce795c05cadf2321. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/FRX452007155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b153031865d363824d2d61ebcec015dce17cf9a76a59d8a774e9cd2a1204f3. 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/FR59R2020422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab03c3496f4683b5687e1588dfe75e3ad60cfc1b280af11f31d2afff748e5c4. 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/FRX202026122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fd72863f7a9d11af497b3bfbe2b34e2d6b20ba1aad68ee1a422d96713ccf4e. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/FRX202096107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3574b25e749d677a2b8e8f43a092aff45b88a20f493ec8df9d257fff70438def. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/FRS182078331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1a21a0ce70e4008cbc985204825c7ecc68b085d64300fc75eabfcd9179f89d. 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/FR96X2185409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0308ee446ea53b295e234e268a6c18bb76e4366bdb09f51cdfee0f02549fb4. 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/FRX202155306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc749ec6c25ea8da5c58f5a10011a7ad93591b52359ec91bc86879ca8008d49b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZN882163726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cc7210323eb1c858a888785ef437b97da4e0c131c411c3143d2412edf1a032. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/DGA062476725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124af8a3a5b296569a7cbad04440d983303acb58154f3514cf28cb40ae754bfc. 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/DGA062476763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfaaed16865cbeff147bbe788301333f850b2f9ef48b12f30004dc652287d3ca. 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/DGA072415316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee2a3ee0031246bd6f92016e31f44e7e54df46d5270ba14ffcaddcba3861466. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/DGA062476686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99026b5b22f9b8d6853a8279c1212ebfce1131fa2459bfc3152c096b7746da01. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DGA072415759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73176975a997a404046e7387d2fe61dea91a3726ba0fd5db33176eb97f7d154d. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/DGA072415406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31d1b8f1e4e353e390dbd0fe2016802f3d630d5ab7b57c5548c54d919c7fe6d. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/DGA072415681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa627094231ba6b369ba9818673a15977bb97139fa1fd4f2c25050205cad24fef. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/DGA062474462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230c18bf1d4c39a6a7971897af321b0eb5c9c7075fa3fe74999f4971ec03dd75. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/DGA072415327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d02a223f0a25e9e310bc470b08de3685c7f46152c16f4d460f5673d5c635adb. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/DGA062476661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b01815747cd2f30d9b9b0c50f1124d8e2a10aad5cf05bb02b1168df8d84198. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DGA072415678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1257fce072d5add98bfece25fd2b1cfb1ae1798fc109fe19d5a4d21a024a1651. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/DGA072416140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc64f42ea506e434208b215a5a24bb3d05c3635ab09e855520c2d310ba2b82ed. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DGA072415409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dea370eab833a0e5b2e7b09441c93509d28d6ced7c45b0ed870306140f965da. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DGA062476739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedaa9104419dfe41c7a2667aa937502a8dcb115a5fbadfa968d39fd57cfb5b5a. 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/DGA072415833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d18a9daa3a5b1033a84386a3664fb8d3e51d722887bf07192dcf75931a1fe4. 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/DGA072415927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c7ec700cc4898aaa6c80fdb874dfaafcb0f8b5073eac5c8ddfafef77deac42. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DGA072455216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7fbd1a719ad1fa66c7ea67626b4cf8db0bd6d8520b111d44b5f69c953fa446. 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/DGA092435980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d6025c82458815c62ac8a3f3585de231449528b266ad9797fcb287c30bbdd2. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/DGA0S2457297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd908c83a2829ffef524a2ffd72e7c0c6ee132a7b60bb0885f1b8fcbf392670f3. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/FR59R2516338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf081be061bec4ee4ae411a47a453d9c1142763468ea4784fe619e6435b58b13. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/FR59R2516336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056047405ac9a53078675121630382c0d10f8732714766a5077b780f213e9bea. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FRX282587970.