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 0x7fd1a5f084ba5ca234298eb6a6b4be0e1e549021a8c551121fc5229dc6e0de83. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d86346d-7725-4143-baeb-ae3a62bbd8b7.json and https://artists.proofprofile.net/proofs/artist/3d86346d-7725-4143-baeb-ae3a62bbd8b7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Polkas y Huapangos Tradicionales (Raices Mexicanas Vol. 7)
Heridas de Amor (Raices Mexicanas Vol. 10)
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 0xe4fa1ba47f34b199539a73c04986d5781e977845fc8b46bf22faecd7dfe20e96. 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/USCSG1096494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515533021b13e291d4efc46c86df12a958008c1ba31cea8d94991ccbbea000ed. 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/USCSG1096496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8b789340fb92912b3bff831694911023db975f7adae8bf2cebc654f11807ea. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USCSG1096498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71980807f80827b834d6b2174225f9d87ed27cedcc4d9c5a1f86d81efcd9389d. 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/USCSG0531806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee68d913e44625544a298eefed54216af3d61d7b443ae2c91ce816bf847f3191. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USCSG0531710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da1ce50f2cac5606dc2178a8d1caf10d0df6a9f60879fadcf0b82895a66300a. 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/USCSG0531601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d48034e21c75a775f8f6a5426d9f6e85c37e40e9bfccdab542c8260f44cba4. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/USCSG0531602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fdf27f27214be58097c1c6e7a9829116d5b9663f120dd4f7aa529f000b336c. 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/USCSG0531603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2508eef2f7b33a3d35e03a36cb25257056c4427492f8c5c3859004c5e283d5. 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/USCSG0531604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9e4e0bbd16b329f3fb87bba0b8ad7eb9f2d118105d0d17991cc65946c15251. 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/USCSG0531605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba3d1d41084d6bb3cd733040a4144589ac2456de41c256dd4fa4af4f83f5144. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USCSG0531606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb63f4cc48f421d20b788401bfdad6a574e8d4a15b1615a5d2ecda2abfc57dc. 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/USCSG0531608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6067daf08ade1f5ad9ac915ebc3cd3ccff3c3ab9e9149e4b7c71872f10ecfd11. 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/USCSG0531610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a59a451ce7815787b29c1bbfa63a84b8b9426e4edaa73c8699113f4df92a51. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USCSG0501810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360ade8cbdf1d6c23ddfc4a9c0c23400bfc55dd21e9eac3633022261e38e1fe8. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/USANG2177603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89ad58b50056880d277933c4781c0e2d59db0bf3306a70277bba712a87db078. 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/USANG2177610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8543772936aeef8e7936d15e599b6faf61586fa4b3ad7cf66378ee87bf7bfc. 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/USANG2177201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5532625c2ec52f78858b169a411d355eb98c574c5bc6e38f353eb910cadd28b. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USCSG0505601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123424f596aece1d52b22a0a9a8961a704c4bcae47f30945bad2f4a0956516b8. 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/USCSG0505602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fd9eab2f4435597c105386c5b901e8a882010a822b3a25d79351b149736610. 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/USCSG0505603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742d191dbd7cb870e77269c1bd29d78c87e9130d42e21bc14ae37198a04082f8. 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/USCSG0505604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143abc758176cfa60b2d7a457389ff5625aa81b09d17b244e0237303290c3eb2. 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/USCSG0505605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5584de4e25e8b417520f578ac1a4d972bc9cc33c89d0b41a6cbb88d86dc48e2c. 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/USCSG0505607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ff641051f53f3b27a9fd92900c5585c5e5f52ce6b2ef454865da6007383c68. 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/USCSG0505608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38342b10f539da7c94a2be4bfc7b1021ce035257b800d8c383a0f4447722f63c. 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/USCSG0505609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf329ce23e838c25529246f414c0eef53367ff838c6bc72709a93838d0f2a51. 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/USCSG1096706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941d8a06e01ef9409992ad87a5e82f8c5eaf87ff0b1bb43db8200e99fd50da96. 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/US4XG0405467.