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 0xe390cc244b7d1094bb7bf773460996bf73041797273955a87378f215e85d2e98. 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/15255557-6ecb-4de1-8414-211be33fedb6.json and https://artists.proofprofile.net/proofs/artist/15255557-6ecb-4de1-8414-211be33fedb6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Duelo en el barrio del Arenal, coplas de retache
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 0x6adea29752d84369c49277e215a8bc0080f29d56b7a331d2001acc74788b8988. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZPYN2465171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c71bda43a4c3d7c36addb4cb308ee436fbca05f0f76975eee2b1b1adb3eeb3b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZPYN2465173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807fc46627272f1e3e42567d9b5dd15e89bd798b7d0734ffbec88fb07809b5a3. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZPYN2465175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17100d7ff99ed6e16b0c0fa21d0274944d3335785b14ebb288251d3fe92390d2. 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/MXF010101130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa53a27e94a38056fda8e61fa69b00b459dbcb78c5e065a3d1a3ed1199f396c4. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/MXF010101116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31346a1982c7e42445f85e67d9fda1ff010cb5de67e50bc8483fd3d9c3fb0da9. 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/MXF010101136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c3c36693625ecfd9a3efa33d5a1ac0484b4f03472d7d21f6da001c7d974200. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/MXF010101143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bf2e627348f2307df8f1a50d8f93dc7e8e75b6ddf304d3cadc848f8f88e007. 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/MXF010101135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cdaea43664ae6b65f315588a536415ba936367116cab4066658bba348d1b0d. 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/MXF010101133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894ff6859b9be9e1e5ccfd596f0438a0ec75e1b2db1a387df60606ff8233a36b. 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/MXF010101115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10eb4e9ef288008d5f29f2ceb4f8a197cd8a270daa81dfda90a75cdfa1637542. 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/MXF010101110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f68c170c488c692bf62aaad1db33caed73805cd67d77498c548670b80541d5. 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/MXF010101128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0454c5ab6a9f234c78d39ae8dfe289904093d7c3de303e677791e10bbd60b9. 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/MXF010101111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f9f2e25e345c1f740b6228703ee50d4d3e484bbc9e5da9817a28372b4202e7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MXF010101129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153ba75c07100ce130593c50337d9ba2cba72d7d11460ee5fea064e12843f9e0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/MXF010101112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1746291731094c66934deb66d0ddcf6c51b5a0797c6593c91574e5c5581dd4fe. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/MXF010101114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e8f354ce20eb8760bd2c1c8c7662c0d03d209946b4ed66ca6594fa2a467066. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/MXF010101132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa53a27e94a38056fda8e61fa69b00b459dbcb78c5e065a3d1a3ed1199f396c4. 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/MXF010101116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64854591c91af347dfcb3caa4adfc9a8a2d3ef928dc767baa5473f7df5665e9. 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/MXF018600344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ded9ec7e9a1ede2b60cf218737069e21c6f19763e8f9c58a27750d869eebf15. 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/MXF010101117.
Pensabas Burlarte de Mí (with Los Carreteros)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9432cb7cfec6ffa36282df14b9159a875c34f4fae8c7f17f3c8bd5ce9ba98160. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/MXF010101138.
Bríncate por el Corral (Nada Te Puede Pasar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb66b5eff15c4414cb6369d63010eee283bcd6d836d220fa681d096c5fc29d7b. 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/MXF010101119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d73ab56275e7bc9ecc56d68db79f6d33b9a160c9d2a4328af47c48af9307e2. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/MXF010101120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ca19b1b8d2197b345c9527514cfc24afade2f3d480769d1e60a4d856a2e178. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/MXF010101139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90d393cca302f0b04b039b5d042c0ee8f2ae277e1bc52e9651cce78fa30575d. 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/MXF010101141.
El Gallo y la Gallina (with Los Carreteros)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67aaf33bc91cd7f9031d68cf2bcdd83f21d7a7dc8cb59ca7b28bcb600bd4caa7. 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/MXF010101122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ba12d43ee8a6d47d2e81cd709cebc65ec3bab35579f8bb38c72f77b7e70e14. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/MXF018600340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e03bb003b72b42e00c2cd78f52e2ff199d25de146f88005cff8bd9fd60ac6f6. 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/MXF010101124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4255c617819b0887b8135a81459d6bab034c98f4d784b666a311b9fdd90d280d. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/MXF010101125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0ac6266580b2e09d1acf60c9b751de6d33126ab0b5604482683f39b794e8f7. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/MXF010101126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe494ad17412960bdc50bbff8ad39dd975edc76ff9ce572848065df227a1c738c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MXF010101146.