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 0xc03af8e0e6ead3210f80983cd92f17388781494d5962a9152429b343485f1502. 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/b4428f4a-8a5c-4aa8-a20e-513e945846d0.json and https://artists.proofprofile.net/proofs/artist/b4428f4a-8a5c-4aa8-a20e-513e945846d0.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 0x1fe06faf46debb03f387a0bfc58ff2192da0037560fd4ac3ef143c01041a3a15. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:29:27Z), 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/TCACJ1595461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2a18b498066cf07a95b0520784dcd78fc265fb68a932b4599976bc757b503b. Chain 2 (Bitcoin): anchored in block 959363 (2026-07-24T04:14:27Z), 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/TCACJ1595462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ff1e44f2c9cba85662fad50debf2b67a5204344893eb8d60c486e22802b7eb. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/TCACJ1595463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf6dd0dbb83597642a68e647d82d86d745fe39c51ee6792b3aeba5d14007f13. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCACJ1595467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ceb29e77092f41d93803855f9781c13a9dbf62d9e3eefbbb8b22c6e6b34f40. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:01:56Z), 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/TCACJ1595471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe06faf46debb03f387a0bfc58ff2192da0037560fd4ac3ef143c01041a3a15. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/TCACJ1595461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2a18b498066cf07a95b0520784dcd78fc265fb68a932b4599976bc757b503b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCACJ1595462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ff1e44f2c9cba85662fad50debf2b67a5204344893eb8d60c486e22802b7eb. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCACJ1595463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf6dd0dbb83597642a68e647d82d86d745fe39c51ee6792b3aeba5d14007f13. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCACJ1595467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ceb29e77092f41d93803855f9781c13a9dbf62d9e3eefbbb8b22c6e6b34f40. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCACJ1595471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08a6c60f4a2bf8c8145c0e67cc5f2f588f5a68348f4ce07f5871af19e839b2e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCACJ1595399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37664cae69575bff405c1e7e3e8496178d0eff9818c43363f5df474ec78105a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCACJ1595423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef23ef9354ac6266c60e612c3b1cd876a3aa4c25541d178edb211733f8fcce20. 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/TCACJ1595396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63efd195681a8e667d1e2035a72d6e8e55c536da5a9133ff07f6955d6f3d43d2. 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/TCACJ1595398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08a6c60f4a2bf8c8145c0e67cc5f2f588f5a68348f4ce07f5871af19e839b2e. 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/TCACJ1595399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76b8f4d35b8b872e4c22e37eb6c4ee9dc5d7761b4d889ccc57bf61a4410d688. 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/TCACJ1595404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3ae8957aacc1b0ebc9b23416d3e8a9dbad822202cd81f7b853cf234a5744a5. 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/TCACJ1595420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37664cae69575bff405c1e7e3e8496178d0eff9818c43363f5df474ec78105a. 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/TCACJ1595423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f821ddb7366fe6fb77ac38a08aaf399c1fdfc91243c7a9f4d52322bf35433f5. 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/TCACJ1595427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77b5fe96d4511952fb6178ee1bc77d0edebf6137016180531eb2d38a05bfc0d. 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/TCACJ1595431.
Día De Entrenamiento (feat. Liricistas, Dous MC & El Bicers)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5e0826ac8dd105701c52800ed683d339e579ecb80bf2eb1d755a7c6a3eda2b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USHM21526605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f66121f1d97cda1ff3d20edf43390ff74ca463019d37feca755c0701172dca3. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/USHM21526609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5e0826ac8dd105701c52800ed683d339e579ecb80bf2eb1d755a7c6a3eda2b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM21526605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f66121f1d97cda1ff3d20edf43390ff74ca463019d37feca755c0701172dca3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHM21526609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ae3ce2fa790c38ceb297f5b6a04e232746c1371467bf6995969bf822465ad7. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:41:43Z), 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/USHM21526611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe74b2c94b0b491829dd46d5a29fb8654107f3dd1f6a14d3f3e68e83ff352c0b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCACP1609596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe6da1a0ac3c81a7aa177e0ff95d5be0e938328e1c486e9679f146fed79d095. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCACP1609602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f4dfe3a1e4fa001617c80881a8bf4dad52da2c5169573bed4dbec147d2d83b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCADH1715317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ee01f97bed20598bf816d21589638b4bc9ab42b9021aab0a898d15acf8cc00. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:41:34Z), 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/ARIXB2200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c26191a6df6882c8495f6dcd599918ec62e1a78430cf0275942d5dab21f8af. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ARIXB2101714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d3e6a328827479c96d1df0547a0ab4d35e7ef7c2ea7e09be61acf04e146fc3. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/ARIXB2207258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ee01f97bed20598bf816d21589638b4bc9ab42b9021aab0a898d15acf8cc00. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ARIXB2200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb8f74fdef48387f49364f5288f6553546f8733b85d1189db3c2fe9d570f856. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:51:30Z), 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/ARIXB2207256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf13335448a5de052953c1921250ab7ecf15c22bc72a7af8b2050189906aa32. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/ARIXB2103698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d3e6a328827479c96d1df0547a0ab4d35e7ef7c2ea7e09be61acf04e146fc3. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/ARIXB2207258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdceb75c754836d78f511458390f9dedbee359bb63b6c8ea68f0f5dcdc31e6b45. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ARIXB2312307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8250d14bfc752e2257ac8b2809a1e9619fe4195bd34834fc9b733f85a2ea863. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/ARIXB2312308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686ac707c3471edc8c858a9363d1e485c826a931d9decea83ce8cce660bd8916. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ARIXB2312306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdceb75c754836d78f511458390f9dedbee359bb63b6c8ea68f0f5dcdc31e6b45. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ARIXB2312307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90aa933d1408f22fd841244ea2f40db6aec1bbeb55393078ce7dc9b0598eefd7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ARIXB2311137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8250d14bfc752e2257ac8b2809a1e9619fe4195bd34834fc9b733f85a2ea863. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ARIXB2312308.