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 0x2b9eccf6964f126aa88138a2b11466c84661480d613ba0ded42c8c0013cb5f71. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d57c3fb-2468-441b-ac3f-516b69cc7854.json and https://artists.proofprofile.net/proofs/artist/9d57c3fb-2468-441b-ac3f-516b69cc7854.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 0x6827fc24e05cc1c623bec9c0c085b6f3e5780a8c6e9c6880e575e0cff60ccc95. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMBZ92367707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236a4647a006b063d22efba4602a153cd77a477b0c23edc3366c4cd551060b42. 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/QMBZ92367708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0375ce3fe90b474b521af69314ca988bbf5ec8bac2528e0fc9033069516fc8f1. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QMBZ92367709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c62b8af060c2c4f2f97990da8fb3662b17a906bb417fa9b4829204ae54a5149. 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/QMBZ92367710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc657397e4bc90871d8012e0748100638dcb4d348b59de16566b7743fe92bdbe8. 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/QMBZ92367711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6722b74c50584b843e6655a7ba0b2fac57c92adaf3d237b50291b10cf22567be. 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/QMBZ92367712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1137c37ea6db3ee13c5fe1e04fafa61fd4bb9d28a76ccb5ba76043362cceca. 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/QMBZ92367714.
Que Te Quise Con Locura (Malagueñas de Chacón)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7164c710cf91cf24bfa41dc04c106727cf0490b2f35601eb421af39aaa2b02ce. 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/QMBZ92367717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd5e0e2ec34be0639961cf3c7a5e2af5fd5d829c3b0977759d5753336af0f65. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMBZ92367719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7d61c25f5a414095768196ed40e5315ef93361ec6532a21c9d290df2417052. 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/QMBZ92367721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbe390f8c3e0d7a36817b2360653ffc067f4510efb666626b6b3b8c59e398fc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES7732402037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5934a7a77e498be0b0e9d27fed866ca9fdaed1b7c1ad85e0b4aa44616d518bd. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ES7732402038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81433350fc9d45f1f87ea7807a5da305b5bec53f760d53318daa77dc9944d6e8. 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/ES7732402039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b26c472dd773af8b8bf3614e9424b0a407a88fab39b8a9fa046bfd86697566d. 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/ES7732402040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4a735e0492859be2f6d703fe427392a8318484c949f87289afa3077f1c0cd6. 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/ES7732402041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4613899a9d130775c7791d8644387fe83061e8ce975588d5c956a2388e7ff876. 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/ES7732402042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f0aa8dd127f62344d60da0b5faba9dd7328641394da43a4b70fdcd40b90ced. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/ES7732402043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5166dde067a05115d94216f33b882cf0bb9def411992493207a0f280374604b. 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/ES7732402044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81433350fc9d45f1f87ea7807a5da305b5bec53f760d53318daa77dc9944d6e8. 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/ES7732402039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff40da1f2d02c56bedd40a5e88ebd399147f05f034bdd33399ebc62209c73ad. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ES09S1800201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf42cf0a387eaff0f2590b5d58b3bf6f263491231a092956ac7224d7fa33cc4c. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ES09S1800203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a13e0f58af1972b345a4520a082e5b0154b5e00b4919b1bab1cb4a33ff5acde. 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/ES09S1800206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ddd8647f8c224080e4bc5f4e385f711ba163c3fc1339686f350ff8cd82e14c. 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/ES09S1800208.
El Aire Que Respiro (Cantiñas y Alegrías)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15033544aad22bc2263835e5f0f5d302f7ce6de3214a3117b39adb5c7ad3d8d9. 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/ES7731402023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb94fa0d384f87c6c2c5558efbb8e07281b96cefc6b8ea492155ad582417c9f9. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/ES7731402026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910748e894b9dd01adb3cbd5c6731859ea210c9afb910aeacf3caca644d7524f. 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/ES6102200626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7db7cab650fc59f9490cd3d9f112e85e53560634b865e030cf2b74f75431a29. 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/ES6102200627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852aa2bae49644ec60e4bb99f0827577de0d6d9b78e6bec71a95bbe133002796. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ES6102200628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9938910d68ae11c695a7e5de738a99fd18a8177ff3accd023200c1ec9f1c2308. 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/ES6102200631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63616d2e6e1b526a3669a9a01f77e9c072470042687af3a4426d8bfdca17ba6f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES6102500144.