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 0x24e4e598364f9e0ebd25bbb3382ec5886280ae53718d2d315d1d18b9be5e4ec0. 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/f59a575c-88a6-4b4f-bdfd-f6b87c7175c6.json and https://artists.proofprofile.net/proofs/artist/f59a575c-88a6-4b4f-bdfd-f6b87c7175c6.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 0x9a76d6ae34a44af499f603c9f7b63884ffcec659279f7ef23284fe1314623c84. 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/MX4971530507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eec2d9f59342f59936f3b25529021c8ed0233c63a97b4c4bf8cb2280046afd4. 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/MX4971530509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7868b41192f8219d3630a8bd2170d8a0c30a9e8662cece2fc9fb86e84de417. 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/MX4971530511.
Popurrí Celia: Tú Tu Maldad y Tu Amante / Quien Como Yo / Lloraré Tu Adiós
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5685db48c0bb8f8229284533065e147858a023dd9ef148db7d3371d13b667626. 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/MX4971530512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc417bb634737f2c03eeb1cc96e2ec778066be0341ea2bd6bd06ab1f6ad5a98. 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/MX4971530513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabec5b18b1ad1964bb441f86308be0bb1c9d69278c766d60e3c471ea4f5e0e31. 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/MX4971530514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a084ef92195b7fa3619e5ff386a67756fc05524ab71270379f0c96695af7d2. 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/MX4972140146.
Medley: Charanguero, Maria Teresa, La Mariscada, El Cuinique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88666e743775b0519e1548c08514bdc1fb073b20b6f2769b5eec114767a83c99. 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/USAGX0505412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3e3462dabc79bea0ad0148135521e37cff0664fe7e18bf1be09cb3d72f4c44. 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/USAGX0505413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835cbf709fc83e8e3c7f5d70e715103e03ae5936836b0f93aa7277da5f427344. 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/USAGX0505414.
Medley: La Fiesta De Las Siluetas, La Fiesta, La Pollera Colora, Mambo No 8, Brasil, El Baile De I Perrito, Las Raspa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e9e3d36762eb47109e05af1f24344cfdec52c9958237df914356c30e5fb20a. 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/USAGX0505417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88d87c8b8b210900b7961d7da9932bf79673e19c7bafef32ba3b74c32578255. 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/USAGX0505430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d39fcfc21e6e49287382b879d6df64bf76fee63577a3609bb4d6d07010e10e. 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/USAGX0505431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ba00369e1a604019a0ab8983c7bb73b7d4118f2729d325fd20e76821b0a729. 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/USAGX0505432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28527f5697ebae2ff6993eb1a572650182e5675f74b332a275f467a372143e7a. 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/MX4971526362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76251c387884359e5906be233694e4412a21469ad66330a572abf19629805c1f. 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/MX4971526363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a71fe6ad5ed9fa3ec752218bcb4b91d1ca416f77553f0ec304b356b3ff6031. 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/MX4971526364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f7646d6d6d2cd16f1fe094df46ace8aa54a5ca5c5ea38ccf2fc520bc8501a1. 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/MX4971526365.