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 0xe8407607d85fdbdfa658a0926a44f4808886401193f4060e9f07038cf718fbd6. 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/08475407-b4e6-4ba4-9d65-5d2a9855f9c0.json and https://artists.proofprofile.net/proofs/artist/08475407-b4e6-4ba4-9d65-5d2a9855f9c0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lo Mejor de los Clasicos en Marimba (Vol. 1)
Lo Mejor de los Clásicos en Marimba (Vol. 2)
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 0x49744b4d24caaa0037d900a4218b9edc7c129f61985ebb5e94d0878da6372bfe. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QMFMF1548437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2759aa88220f261b5fc4dc1779a4003686ec26ce8bd7b1ebc1da113d33648506. 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/QMFMF1548440.
THE WORLD ROOTS MUSIC LIBRARY: メキシコのマリンバ～マリンバ・ナンダヤパ
Viva México: Sus Canciones y Bailes Regionales, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32feb1a3f0f50419a36a1df15b3423e4679b1e834262330498cf14c82aed1227. 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/MXF550908036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73fafac05beb02816b0ba098962855bc1a770894322577fb82c107c38775de0. 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/MXF550908730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2057d540b20278873625fb92070ea923e3b84cc63545b05ede2ad4936f04ca. 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/MXF550904374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40607b6e4b1208d1e29c04ebf487b94fa2ce1d7abfbb69df9e0b2685a584e41. 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/MXF550910017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f038470cff5753aaa659ec259be7ce3c39eb3c02cbbe1cbdd7da895be3b5dd1. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/MXF550910019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ed3058a76f90db1234fad7736922517178a9aad3bef508a2bfa958b4363481. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/MXF550910018.
Aniversario de Oro - 50 - Mosaico Mexicano
Mosaico Sureño: La Zandunga / La Llorona / Las Chiapanecas / La Tonalteca / El Rascapetate
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecce6da847177c781e1f0f8e6eef3ea479696bddaff0c3129244c6c25c4f7fa. Chain 2 (Bitcoin): anchored in block 957826 (2026-07-13T08:56:09Z), 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/MXF550813369.
Los Clásicos en Marimba - Marimba Nandayapa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89b2e21b533cff84bb7066e067bda078bd2cd9f454db3255783099029293270. 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/FR2X41512542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49744b4d24caaa0037d900a4218b9edc7c129f61985ebb5e94d0878da6372bfe. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QMFMF1548437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2759aa88220f261b5fc4dc1779a4003686ec26ce8bd7b1ebc1da113d33648506. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QMFMF1548440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b173c3fea121cc9a7b5d1fee80e90c09040444c52a0b15a952311fe2d4cebc6. 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/MXD941808948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe231700bcefa27e696ffca1d25770aba8ab14d5d74bcbc0e6c9af8a2b4cd002f. 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/MXD941808954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6370956c90a7699a4d72ef1db5befd842fda774ffa1703e2b9ecf053dcfbce22. 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/QMFME1907242.