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 0x23ee4668d690409167eed0451e71dd5732c19121e342197d0b8ee1f5911452a3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa9880be-fbf7-4f6d-9857-a0c94e5447c4.json and https://artists.proofprofile.net/proofs/artist/fa9880be-fbf7-4f6d-9857-a0c94e5447c4.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 0x5f032445ac2eb61c1638cae536fff2250c332f65908acfa5dc720b3f3d0df7ea. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QM7282044632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26803b0721db823b7bb57a7ef641177c95d222ea1b2e017eba9d99902433967. 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/QM7282044633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfec5f30fe65f2609484be23b68c960e7f05ce5b04e138b2d05192b6d0860678. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QM7282044634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75674746e2557ab7f4698a5465170f4144d10665de95d5c33693ea43706eaae3. 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/QM7282044635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208215f07e09feba704ef892285a2ea960b730893637a5df46537355cb1135a3. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QM7282044636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923303a47be65e06d51bf59d5af5fb3955d292f7f3678d785c27d5c1e5d78cd9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QM7282044637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac4f335537cd167373e73ef5360f7e44a8aaa365fa95467aab76a32c09b6fb6. 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/QM7282044638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b0cb74436dccf4b726071fcfa3ab82155c7bfb739a34684e4b880fc74c8f49. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QM7282044639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bd2e1bcf7ab3885bbab839bc46722e20355c444fcb0bcb781e047083a680e4. 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/QM7282044640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8954dbef657b4d9cd52002f45cad22f247cdc248990a4f8e5ef06bcc17f5464c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QM7282044641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d9e633106036e05e569c29fc3ceefc212c63cf477ce63c3bc70bbee9723ead. 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/QM7282044642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad7b0925736a721aa938b854a37de205d8bb95f1cc6e1e682cf800141af3016. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QM7282044643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470ccfc48d2e55ec27d8bbd41890eed300f8a14704fb5a3fef876a1ea6f62d4d. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QM7282044644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8710a79882f6dad6d4c9c9d5e44c0ed048f24e8218fa86754860d35ab0aed890. 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/QMBZ92019058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4ecc727a2fa770df8bfebdfcd43023dd10d7adf7e501e6c95709ae2ca0e1f3. 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/USJE62001091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b4b31dea6d6bf1b87786ff49eb0b40257f999c7035aac5f96064e04b6e79ff. 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/USJE62001092.
No Tiene Novio (feat. Nejo & Tego Calderon)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea83d336e10d2e7a7688999f0ef5bc99b8d03a69e9e9710d3e69c6faedd902e3. 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/TCADG1707173.
Siente El Bajo (feat. Arcangel & De La Guetto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb801783e34b1323a4ce8496fdf3a2fbc65d5c6e25bb9dd6a779b37765af70876. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TCADG1707174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfc5f89624ab4aced9ab858ac41d6adc8db1abef36031366d8f088dd019114e. 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/TCADG1707180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc001536f62920d7e5c7b6ad6a05e81a79a011ecdcd7cf0115a236eb0a670d7c. 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/TCADG1707182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38eef6842c9eedf1a0dc627b7df7f483b23bdedded1997a2a42235122a95e3e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCADG1707184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908ce1aa5553b9b0125df3bd223d15bcfddf33279bcc63bec1e900e886e4f61f. 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/TCADG1707185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad03963ef004ed41c483d16d53da49d6b4f61bf85c63f2524bc44e13db3da9b8. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/TCADG1707187.
Persigueme (feat. Carlos, Omy & NewTone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b18d91426c397445ac49e125701f6b1a80a537a9ec1e81291ce467029a9bdaa. 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/TCADG1707190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c0e093b18c61026849fc523f0467abfb2d1c04b7e7b314300d8ee9c4ebf004. 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/TCADG1707194.
Vengan No Se Detengan (feat. Las Guanabanas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa677d4e9bfc43255dc054438b52ffc1d5331a4c28a6f792bb6f20009b7c5283. 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/TCADG1707196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19e895ecb6d2c7ffa209b951dbf864aeb8e0b69c14066b259045e87ab8971b0. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TCADG1707197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb3bc7b420c01bd96555612959e7360c5bdccd3cf83a32aa72b33cfbb30fc7a. 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/QZ4JJ1650523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3edf4f2d6e09e2b4249ea1e25e2d06797c4e9e840ca04bf80b822cb6456c639. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USJE60810045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86174c212d9772bdfe9dcbe5b870ed02384c001ad774b78b308256b173164b34. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USJE60810046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840340cb8dbe9dcf7a532c32ab44e00c169fa0166872ee3c395c6e7834fcd6ec. 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/USJE60810048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6715b0e0f78c98314be23ffa546d304255922eb81cf6d6d5cbf4e2965e5c69d. 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/USJE60810049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9584a6d66ccc3ff3b7bf23554c7135abc3802cf2cb00a70ce6581797369891bb. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USJE60810050.