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 0x0987a8f9b47290b92a0f9a1ce2e153f05a58a518cac5f5877bce40dc870f50c3. 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/fae28f17-d803-48ab-b8e0-2aa11d3dfa67.json and https://artists.proofprofile.net/proofs/artist/fae28f17-d803-48ab-b8e0-2aa11d3dfa67.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 0xcf8e2f2ac1207e50a1dd66546aa3d3cb2c9097a59cfded835d84ec15c1b44e11. 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/USV351395565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97acdb7b9a865f3ccc6e50d9483de292bc23adb36a1b48579fb870ed9203ca41. 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/USV351395566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a678eff1f379b9b12830eb3fb13309b7dc44b127c6de69645a8d6a6e1be3a4. 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/USV351395568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc6551f33a896d2669e5cc730ca203812dcb94359bacb3a9e6490d2684a3c2f. 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/USV351395570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6676df09118acb5b621dec24e8dd2ae5cd462bd0931a46f10b0d4da0b9798c67. 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/USV351395579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e2921817341bbca1a3581a585786a3fed0b4e1ab316f3574a9d63b38e35bf7. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/USV351395567.
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 0x51eff0c5e75972097c293b1c455697eede2d7182d9ee1d3d6440c6788ae61485. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USV351395573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fd3f298a693619e4913e47095059740fe6d012c6c3ddfbc9d25fe08f8c857f. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USV351395578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb644e0e745af2ecfd0eef7223eb5c14d361b885672fd107f2aaba817970614d4. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHN81904877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210b073864acb59e4bdd961e3823ca9e32b3af62fb46e7d1d39dd6fac7f148fa. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZHN81904879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9dc324066ba38f06253ca3a00b53af40d01d9703498b9d61c054b165ba45efb. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN81904880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9131e4f65debc0d88a01f5e55fc3f365d6a18bf44ea3d66d883d5b348adaee80. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZDQH1904571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2684fe9e016b5c60248f1053fea6efef0a3a7423410aad240f49589227a7e697. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:11:57Z), 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/QZDQH1906800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c10f1be632518c12ea25fc456ad0b3cdb3de94a87d8ecfb9fd59dc3380dad8. 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/QZDQH1906847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1322e19417cbb353eba2371cfde105d200cf671df25301ecb7b51211a9abf91. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDQH1906849.
Se Despide El Negro, El Del Agostadero, El Paquetero
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3090266fb8b9b9fc1f7b3ee917bcd28cee6e01bc1181822ae4000bd19a150ab. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDQH2156660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b7092167ada89836294535627e45cc922e8df815ac37a9895f2b0949d1a887. 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/QZDQH2164063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4301d3e393e15df5f7d59b694329835c85d7cdf39bbcfa2c5bb640a1fb313305. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZDQH2256250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487aa4ec74af5984e7813d2ff90f009476cc1c8499ce007028d60efaa25f91e7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:26:46Z), 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/QZDQH2261322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e3cef1fc10bc97288e89a4811406746b5e4aa77d14665fe681e356dd7aeea7. 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/QZZ972472373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe49bc48250c4db9232ce98de8f348159ca3fefc4f0d4d3fc15793577f2fd7c. Chain 2 (Bitcoin): anchored in block 957846 (2026-07-13T10:25:43Z), 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/QZZ972472410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb21142bd229f2a30eb81039112d8f92ca93eb00360dd71924fd7693d304c85. 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/QZZ972471764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee2c0101278d2ff56ccb5805444e73e1c8e3adbcb5a7167ed647f157a23d456. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZZ972442276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d64b58c11bb601d545e4dcf487f92d4de459a4d1b38558e366abcab3bc24ce3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNW72403527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454b21f18e70ba1c036ff8a6551b7cf6286df8d23e3e251919a1c796e1e57bf9. 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/QZNW72405082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422ff0f41b636357d8e34c5aa327a9cea68119823ab753d6c90c1d2141530add. 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/QZXLZ2410500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422ff0f41b636357d8e34c5aa327a9cea68119823ab753d6c90c1d2141530add. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZXLZ2410500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1a65115df32f0d1a53f80e5ddc196d820b43d3c786f0b2a577a3be27610008. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZXLZ2502938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4a036f44be0f55bdf8caec576ddf08253351ea172619c3ca5705bf36906170. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZXLZ2502940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589d8b3a4478d508fa98134e4bd2a251cf707a1d2783bf3fec00d2e512bc289a. 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/QZNW72410772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589d8b3a4478d508fa98134e4bd2a251cf707a1d2783bf3fec00d2e512bc289a. 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/QZNW72410772.