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 0x39a628bf39656bf6ae372497b34fdb14146cdb1901931498a3204d6e6fbb7a99. 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/76311363-9a08-43b4-834c-15e3328457bb.json and https://artists.proofprofile.net/proofs/artist/76311363-9a08-43b4-834c-15e3328457bb.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 0x93801b064993fe31045845bb89a0f3f03a33325115928014139884da7b7fd8d7. 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/US3DF1103979.
Esta Si es Banda con un Millon de Amigos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e13e105c4f472e85de55664b6a8d49191d179108dae8ccbf6cd64fd8715a65. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QM4TX1718702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdbc1f44975f9499997592b4b37f525c0d021ac51576049814da04a868b2717. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QM4TX1718705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1d4e2f6255fccf2cedc157e70855b38c655633cd886e6448d1839f2bbcf6c0. 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/QM4TX1718707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56daf841f23b636993087326cf8c47e292a981a2ba9ccc669c8461186f2b95d5. 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/US3DF1103160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296e4e305d53fea59924590a2c39d5b38b7bc2e8e471523ac4e588fa4eb30b13. 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/US3DF1103161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6087fdbe3d602877fb9bc600a352b5560a41371dedad720b530607db2b875062. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US3DF1103371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce5b69cdc19a8a9aa7acd0dfdfa9d5a07b8ba7803ea7fa91a0d67c30045f4e8. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/US3DF1103374.
Pura Banda Tocada Compa, Vol. V (Estos Si Son Corridos Cabrones)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc4f014f4a81ccae52567727942de1663c90c48669d7110d9ceb567f1a8027c. 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/US3DF1201405.
Esta Si Es Banda Con Un Millon De Amigos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5263fe77e1eacd83ad3ef4f0eb8a3318aea7d6f5882213c35fd7af6400e1123. 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/USZBG1118561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd833c7d10fe2e1c8ad54ebeaa5397fd8a02956bd2f15ef30fea07acbe2085cc4. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QM4TX1628068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8f811fee498af01b0be7d46570fccf43a169c0e55548a82f9f8895ea38beb2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM4TX1628069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fc8ae03003dd843a4cbb6fb16aa719315d60c036d6fab812d6f1a38c61c5d9. 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/QM4TX1628070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8356c6da08d3bea5f9bf8e7e08fb5a62bb48cb83af31de75d8ce823f561156. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QM4TX1628079.
Estos Si Son Corridos "Pura Banda Tocada Compa," Vol. 5