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 0xb02bff275ebd904599f26922cc19c05bf129eab3bd2aac531e5158fb6072a5f3. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6d3d209-290c-4dec-8355-3b85d7a39fa0.json and https://artists.proofprofile.net/proofs/artist/c6d3d209-290c-4dec-8355-3b85d7a39fa0.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 0xd359f72681d61ad9fda8748b5ca771912581977ceeaf3631e419e2cfbce6bc4f. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ES71G2411295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c0d963522cc6d7fedf7964b3e6dd1afb69cb823287d5c11cdd572d8860aa33. 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/ES71G2411296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5e621bfbaae81e882eacba8bea6f82b7e5d8e156337c1257530ba6b197a42a. 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/ES71G2411297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e48ea25f4293a55ea45f4a12774647685a95b440223fe5f9746edf1507608e2. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ES71G2411298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8031c76446949a34d5d79e3ed8e4c3fb43cc0771ca8f9e71a606b16e57904070. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES71G2411299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d68a019b15e6019bb03cb69c6af3b6488b33d161cd6d513729b7a17a5d4055. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/ES71G2411300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf3406301d9d42d4114a25a288320b90af58e871f03d1d90d13e78acc569227. 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/ES71G2411301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7f405f9cd8262e06b4c98378b5ea949a14c45c2b63fc7507f1e63f8c7519a6. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/ES71G2411302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c032f31fb115bbbc1d3e789d40fd0527232f4eca6a1532dd403c00c4c4e58b. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ES71G2411303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a59a65074fa4f3385c872f97015a23c97b6502b158d5f4fb9f67f73fd5615bd. 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/ES71G2411305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4656a8bb42a2edb554ca33e347a2923d035f635029e1a0492b3874155a089ab6. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ES71G2411306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb92e5c766009553e132018ab8aa11a5e49dd92f79c2c8fe9042c91d8a3b1fe. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ES71G2411308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df925793eab829ec9af880c302cdf72cb22ecdc584e5116302f1c47f1a409f0. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/ES71G2411309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2827348b2c4edd3cd82ec53eb50cac756353c0640e1ce857d7210765419edb. 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/ES71G2411311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a1ea589908194b5d118184670d1c1a241e1289c5d3df17213f1b6680d6798e. 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/ES71G2411314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4493092ab8c1e8524de374b97b348aed84f95b4507d44e3e106d424a0123385f. 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/ES71G2411315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2165889848813d4a69e6d5be89c558df091ec2c58f521bd2044dc1af48647a3e. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZNJY2207284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a53b10071dbcfbbc9dbcdba5a3f61f96dd991906de19549ef6c63ea9860435. 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/GX3Q92095419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416bda349ab5a2555cb799a77df35e36901d790f7feb92f6f5893d9d56f86c67. 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/QZNJY2283838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d9b09d198d7d701ec494ebd7dffb24d556e6a0105b9dbdc2cb28eacf48e057. 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/GX3Q92094006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770e980c49294d9c86652edd204689d05d41c5ec320483d867a65d43bc6e8484. 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/QZNJY2283839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855c284b67bd354e1ea066e3b65a6314167e3aa1b132492a31641a014de6ceb0. 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/QZNJY2283840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c914d83fc36d542a0cbdf51bc11d1157e08135a98f94990647a96a6219bfba5. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GX3Q92095421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3477799932ea23f6d32eed4c3889e3d71b3aeff1ec60d6e99d5dff7ebc339788. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZNJY2283841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f058e88abcadda2859a6522cf385dc502869f9e637711d92ce063e8850b291. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZHZ62259653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c9e191f616d4fb5e72b678b106b75925c42271289fcdb4a35fa7b64cd80915. 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/QZNJY2283842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb01df8444931819356544010eb4afbf79b78aa39d405de0deb0d7bbf970cb5b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZNJY2283843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f622c6faf4dc6a658e08cd8a4e2d287a8be2b23642441711c08cc2da9a83ca8. 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/QZNJY2283844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d3a6cd944dc0912f1f8321cbfaed6383903fe249b625f7f938e011484139f1. 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/QZNJY2283845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf710afd921775ad7ee3244b012e956a52c3b2dd317461f80d73e173754d3c529. 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/QZNJY2283846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2146dddcf5996dcc35f33fe07e2cda9f5ada3528ad1890d664ec0529037821ba. 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/ES6102400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce499ad0e57a0830cae0705701d4bcc4edbd964d94230b0fc39fc50cd6a2261d. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/ES6102400124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6aced18641d319e6ba21624b6d47037d395e992e196bd5b6d42e08c1c49136a. 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/ES6102400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8edb159dfea0685cb223da5bf4473100f75b29e1fef6d70f1aa36de77f53c47. 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/ES6102400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3df28e2867206c84e647d57ee5b3d3d6e5638c28f1467fd522e7c52528b857e. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/ES6102400127.
Abuelo - Guaguancó, Seguiriya y Martinete
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd9e0aa9183b6bb7a1fbf64074dafa07ffb7471771400d206b38ec46148147f. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ES6102400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f0578d661b628319cbd6b07cc544d34e29de3884e3a3da19845467937aff4f. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ES6102400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8da5fa6e413588f3f4cb2d19c0cb6caa2bbb20dcc0c03c03e630fd65deecab. 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/ES6102400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b97bc102b1645385419948f7f56599ee897b3df1f2cb995ff32c807c0b6875. 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/ES18B2100870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415bfd68f24d0006243809b9ec92f7500489bb323425235ddf14a3971b4ceb48. 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/ES65A2300027.