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 0x64f1287a2e9f80352a388b476e39821672be9601d4165d719ed3d7fc695628e9. 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/a7aed325-8243-4c4f-bd70-2ab9258774c8.json and https://artists.proofprofile.net/proofs/artist/a7aed325-8243-4c4f-bd70-2ab9258774c8.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 0xdde8c004e6ff116e911bf7e48e310f589d2eb0ed0192e964f117fbf82ebb9c37. 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/QMEU31505532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b1e43351e1717efd756783d0bbd2f3f362d177053bd2a14fa2e323a5db389c. 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/QMEU31505533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8751490128a2426a1f2e65c8c9b70e874f20b5d10c260ef599bdd594ed49a351. 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/QMEU31505534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3462199750526542e2f8f3d813640c1fda07259d25a9dff471c82eda2a42eaf3. 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/QMEU31505535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a58325957dcd4ec54a5f35c21d26fe6b33cc7a77ed553560e96392b704888d1. 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/QMEU31505536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63cb740d3ccb34b4711c6c7b15dfd43a0d5516c986b9186ab6b497ffa7978d0. 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/QMEU31505537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc02c6b5b65046aa7a582af8122652db33b5cb38bfd8299ecad6b4926165d28d. 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/QMEU31505538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ce40f4c3936c23464706acf4a9fa311a636834e12a8603324df11c7f25a8d5. 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/QMEU31505539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd967594c088fac7693d69bbf7f91424bee71c3faec03288658b16e114ac1f26b. 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/QMEU31505540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1594c1d1d58594301d7516a0c5863582b2ffb45bbc79458bcce83e47bda47ac. 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/QMEU31505541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd1748073f67cf239b464746872e480b2a4bc1e796fe2e434fab9e2219d967f. 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/QMEU31505542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2594414660456288cc086c802a45fbe4fc1969d7b81e666dec1fd657b820c6b. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USX9P2315248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c91ff7ad416a5b9587cde5c4a2367ae2e9f56c5cc4eaba57283c163701377c0. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/USX9P2315249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9d886d11b4abb6990c81895c17332bfd3a74d0657a9ad40a0e5faafd4fbea9. 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/USX9P2315250.
Venid Fieles Todos/Ve Dilo en las Montañas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667aa9194d645a19374d40b935df94ed95af52391d6e10c94365709006b685d7. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USX9P2315251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8d0de0126f029b50e19cb50c5215e70069cddc58c23aebceb4502719403167. 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/USHM82199593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db2243eb99ead507020881de4115715c0486c9849ab9e84f6810241dc79b49f. 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/USHM82199594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ab36926a53440a6c8eb51b4099d4b8a0baed730a02061254475325daeded9f. 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/USHM82199595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fbdd369eb88af64e7b909d7d3e7889bd46e0e310eeb3e3555ff9f0ef88c79e. 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/USHM82199596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9836504ecea5ef9a4620ca5d61345bf1abd9ea1084f9738ec4ad3033ea895ba4. 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/USX9P2015058.
Cuando Alla Se Pase Lista / Cuando los Santos Marchen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a2098beafc601995c17c57d61f77e9339f119480d84bc715953b2e2a6946c6. 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/USDY41786057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8ac8318cbca0c44461e44e72a34bc5f11ed1d6805dca5d613a0e0c3881849d. 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/USDY41786058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f2deabd028bccb3de587fe25fd219c5bf5e9af01a548e6069fc45ab591a20f. 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/USDY41786059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8736fa05872856a374fdf4440f9930cef4801bf0619978aa211aef01f74301. 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/USDY41786060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a3717ee3c111b261c17f314c999a10e0a428c042c76ce6e1c9ed89a6b3be75. 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/USX9P2018431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3376ec399628d81a6deb0eae775447f736361519997e96b80467c9227ceb35. 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/USL4Q2424430.