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 0xf5823077abc49aebdb7763f31ed558c985152b7d266437a82d6f2b65888b3be9. Chain 2 (Bitcoin): anchored in block 954069 (2026-06-17T08:30:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a6c497f-31c3-42c8-a16b-e5bcdc483afb.json and https://artists.proofprofile.net/proofs/artist/7a6c497f-31c3-42c8-a16b-e5bcdc483afb.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 0x2ded5b699ada20f9a361d23455cb85bed923467c838206d879a9764f1f1abffc. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZNJW2368148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61cd75f9fe96e98d09f28fd99f4c6f7842271d938942a65edafe2db73da1de7b. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZW9L2299688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc0b305b323ab8b288a22d5405476886b42bba8c9261d294dc6d36dd26c8e37. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMFME2188826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff632551ffba274946a6ff16219a4110f6dd554d58f5a80ea211e7c0c938280a. 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/QZW9L2377534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a770e54613c55a4379361f8d9a9d8b51b143ae8dca8e2e33317904fac5bc129. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZW9L2377535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d606e4e0328510f133c0bee471d4654f05fd41bc34b4becda6226285f6390d5. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QZW9K2337520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9169151121e7da5a50198eab05cb32caf70855fa8e58e1ef2d594ec54a1e013. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNJZ2440400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c23554f8eb6553127265b58a85dd71d6c9e199303d3989daea37f0ffe7603f. 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/QZNJZ2440401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcc9958082a9bb7d261f94b73c479b793142a354d700548e54ac440ec72ee85. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJZ2440402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099432ca0b7758e247f096d4d30163dbfe4a126ccbc46774cbb398fa07db4b24. 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/QZNJZ2440403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e02618d204825f56b5426994f8b6847177c65023eea0017a24580ac031c956. 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/QZNJZ2440404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cdf815a2a5fd6236c39d680b7e517c26e8c4a576b55f74ff29bfc7caf3e5ee. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZNJZ2440405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030c7260909ad68197d5fe69831e635962bf3937df245b07abb50e5cefece4d8. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZNJZ2440406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166e904873e2e3502fef19965e2abca8b1b0a701612b2d6fcf4ffa37c2d84fd1. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZNJZ2440407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefc56ea01b39a9c85455313ce83ee33da28a5f870c7db63c9d806c539dd7e99. 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/QZNJZ2440408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2685e977f82773f2440c9e53e18218fe5f553d03a57b5a08b9a718927339142. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZNJZ2440409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56880a7a87e2a70097592a1d68db90d658d5284a03ec09d721a91614a48b259d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZNJZ2440410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bb3ba36b1d89cc52210677b9dcb90fcafb9685d06a68744ad357f0d5a79b59. 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/QZNJZ2440411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d9366748eb67fe7f05741749012e5b9115212a6515ffc29cfeec8a72aa821a. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZNJZ2440412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4ea7eb5bb6329714c804b8295f1fcbb544cac3713ab61aad46b223ba477385. 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/QZNJZ2440413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d86a46bd820a4b82932cbed43347f5da904ca9c98e591c34a4115b771dd9395. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZNJZ2440416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab4e037f723882fee79aa89a30910c474f9937b5e8dd0a1eda2bdf06845a54e. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZTVM2314875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf7fb7d71037e9c978573987ab6a93daa2340151393c2324bfd893f7e88448d. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/TCADF1796818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fde073ef357934191c01c4a53267b7ce27dbe39d7931bc1f743eb1ba5a32231. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/TCADF1796827.
La Ronda Mas Kabrona (feat. El Shaaki (Elixir De Beat))
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b6da873dec90edd462a2456237720209628a3d100d3d38bcfe00775ef467a4. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/TCADF1796853.
Rap Sin Color Ni Banderas (feat. Dave Bee)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2074b33b2d1ef6ff8c43456e9a1f2a0c757f3c6d46c0605aeab5b73735087763. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/TCADF1796886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50803c1421e4114db16223abefe406bb9f8b5b094d41d0bd2641e86e2e5ecbcb. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCADF1796896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221e179745d64d36edc0d50fb31631479a08042f31b1a38b292b73262300df4f. 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/TCADF1796921.
Soldado De Sombra (feat. Mancha Terrorista, GranNota, Desero, Bassone & BigBroka)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4842d57a26d5ee8e00f114335b8d1b4023986d64d64c97dc16ee68a885c10b1. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/TCADF1796936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf94042bb1a743681742b3cbba75b726e41227f8af193c3d92d61fea2a3e9f73. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZNJZ2493184.