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 0x2fbe89f96a1714c52f9a4d1aa0a2607aa722509b9fa09feeaf936d0bd7aa913c. 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/b86625d6-4f37-43b5-b9b4-ce16b2668635.json and https://artists.proofprofile.net/proofs/artist/b86625d6-4f37-43b5-b9b4-ce16b2668635.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 0x7bb83f21cf75a952bbafc99dca38f15291c6d7f30edc6501901b4d0dc6a39730. 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/QZ7R41852982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543dfd96b3d6bef7afd8a0f214de364d3c04f1593007b9acb5504dcfcbcfddd3. 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/QZ7R41852983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b56c4631a7e208a7755cb98a55d765ee6b097f1968ebeb041dcf9f17069bf5. 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/QZ7R41852984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7e069230bbd7752f3e2faed7ab8f67580b9eafbf48eb5dd5fd0555ed52c451. 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/QZ7R41852985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a19ff93850691a7bfa903da646adbe9413787e72f82eb643bd669bcaf6905a. 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/QZ7R41852986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4fdb22b91f42db6be00fb71b1030e26960488170c41754d69affa53d086e89. 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/QZ7R41852987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fc94c7ec2f008d575e5527e08eb873a33d21f937f6116b67f60b55a4da5ce7. 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/QZ7R41852988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64c438b7096c72a51afad83506a52903ee4409e21fa57a25104478337aac3b2. 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/QZ7R41852989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23d8d8f5fe02f2f7ee6c4cec30d7892493ab7e0a31e05adf5327d999c0e1355. 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/QZ7R41852990.
Fresco & Sucio - Desperados Version - En Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb1b74ff946a64baa2aacbbb4a877a433879442b3972812f79e88c016901f66. 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/QZ7R41852991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c8991b928717e7b9140bea806296b4517e4d6c4b2b81eb1f062c84c8fa3297. 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/QZ7R41852992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229884b7c2f640cee0fb6898aa4a666366f7d6df795a09111cefc8053ca086cc. 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/QZ7R41852993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d74fc89327cf9917fc2eb3d06de092abdd1770ee12129db184314ed6824b23b. 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/USX9P1438257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12659e34de4691d52c3bf4f0995ea9171229d8b1cf9fc360bb64f06c8021ece1. 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/USX9P1438260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df9b14fa7e800a8017c1b28e52b34474bc7043ddc3aca5f8c0a2d531212444c. 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/USX9P1438261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7e24fcffb726e8a368caf94e699cf531ba385dcf70870337856c88d588dd68. 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/ES71G2203726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda5b0638bafdf6614b1530c0ebf30695d4e6a517f6d587544a82ab1f4c77065. 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/ES71G2203728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff828df1645d78ad62b444363fa8673939e8c18a59376725f61e506a36428446. 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/ES71G2124478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd66be044aa0bd0de2c59684f37c49f07271992dbbeeaa1d02a43718a7a07b8. 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/ES71G1908486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d7cb475f11e90feb015d895184f700bb01257aab58a7d16e14ec786bf0859a. 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/ES71G1719429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab524d69a6c21779ee1ebbd6f16db777424806c0cf19475c4a3e1cc85e528f39. 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/ES6041812101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5c33745b6013bd75ecc1d272ebdc6543c3832ac0a16ed2bdbb5ee476859aa9. 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/ES6041812102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed69ec8912e03510a25a68d2d4576e6adaa514b0392ddd2ce23b457ebd9834b7. 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/ES6041812103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941b2960e55a518bdfeee8f7f250f760a5aaf4fcc1edff6bb13461d3c7e89b08. 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/ES6041812104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc805994cdea53c82137b17cd1002d4026190af4399bd789d6dceca93a9c0b926. 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/ES6041812105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3477a1c7336a8403d12ea091e88a3b5cc4ec9399a3fc58b0101bfe50424f7e58. 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/ES6041812106.