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 0x817d0fc70a88b5ca1051410054fc1244bcc75dd0dd5dc10c6234072ff836cdc9. 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/8d9582c4-a207-4b50-8ba2-2fcb09c1fada.json and https://artists.proofprofile.net/proofs/artist/8d9582c4-a207-4b50-8ba2-2fcb09c1fada.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 0x62e01cbc229c480370ff82f05a698ff74924308f845c9ddc644edb4a951158d8. 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/ESA092235924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab97b42d1bb78db916301eaefc687a04cb651826b19a14a348ee8e83b3787d6. 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/ES6172222240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab97b42d1bb78db916301eaefc687a04cb651826b19a14a348ee8e83b3787d6. 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/ES6172222240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41286aa691f8dc3689de1899a3899147eeb36e5e4c9c817b8b04681f24a765ef. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2315173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee211b8bb4f1f28a5e3b7bebc938db24a98d1703b889e52237cbcc64b5d8ec68. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2413887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3943c441aac53d8f077ed6d79395331a2520e979da79191a0c1312051255fb4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TX2446646.
Japoni (Feat. Camin, Moncho Chavea, Jthyago & Samueliyo Baby)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a5a925a811398bd40ef19b8101b02f5381856f521b57b6c1c517115ea5c94a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2326219.
Siri (feat. Jthyago, Anthony, Jhaylar, La Cuestion, Siskuflow & Brahms)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d92e75cc013c5f5093e8ba97c563a6b1b649c8aa49065ba4c1bffd5fe2927bf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2313470.
Las redes (feat. Jthyago, Oscar el Ruso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70328e2a4253869bffd988bd3f7b0046b147a3418c1892f12b7b7be5eb0abe1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BK4DA2306992.
Rompe y Pixea (Feat. Iam Carla, Son Cubano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c4f72709e1dcb2711ee20cf256c4a15e2aa5a94ce89e7651b58dd96a6459b1. 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/BK4DA2306712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7976c65c33b23fe6053de4933e370930f5190b5381c571c72dc5eeff61653ced. 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/BK4DA2301678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd813eb30824a0bbfbfd5cb1d0997213a12d704a3be2ff3a17f0f2610f48ecfca. 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/ESA012212268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a62cac4a3b2a9557bfcc0c1673b3b9b30cacfab074d0d232f271925b4205f4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES71G2150060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e362f805286aff5e57913c5cf0c5efcebb745e885f2ad73a633f6c10dc8192. 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/ESA011657542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdecb7f02b859a8d89682046d9d9d7d18bdd84f1da3ba97f64cc74e9467cc84d6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFZ52060509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cf785e1303bc65eb4defd575caec1d2be1e7d2be226e00b3317eff85ecb236. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ESUM72303072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aae5b4311e1e7096350ce7a06e48624479fba74a605653092cab384b562510f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES5022400487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f21aef5cea0adfea59dd2021a9660fe14cf6aa638ec8da312cac3912d581d2. 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/TCAER2007492.