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 0x7343596af2ca333a81b429f93e1380f5d32f5ca5b7f5d7296b0cc1eb49a9e9ea. 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/3671a69e-e74e-4b67-9394-faae0efe8540.json and https://artists.proofprofile.net/proofs/artist/3671a69e-e74e-4b67-9394-faae0efe8540.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 0xaccbf7d99e09966c789c36fb1ea9567b3d5b69beeb2c4115fecb7160dc1bad6c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QM2PV1706375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a99d9e125858540f9215df1c30c60d8e1f9dd00a1bcced131d727ba0c66bea. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QM2PV1706378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1a94e7bd2f7aa6c0a86842adbf1de2fb0e5796857a058e17fae1e6e04d6bd1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QM2PV1706381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ca48f936ea28cd85423c6cf5884faa9716859aa176f5f923b50eec8ee97164. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QM2PV1706386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab28d7cc885a231054ac8cc061f26328111eaa9a534415635c19c00ad2c74e0d. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QM2PV1706390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83ad1f6e50ed5759175e043d1d3cff7332225927d7ed91c9f3c37a84438144c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QM2PV1708202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843a94bf1b1900a053019b7271889ee47dce4aa727a4c10dc0ce33816ce7cdb8. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QM2PV1708206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdba3093903b00b06a3bdd9ce7856abf87b782f5314b4c9146788715b36ec7e8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFYX1944401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8275dc92e40843f2b605e9408aa0431e7f97d2908897f4eddb6684cc9cbe979. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZFYX1944406.
4 Canciones De Amor y Una Canción Desesperada
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8351510a5ff2b8f6ce900d2f542df88676c7a7b48f9d900a67beeb757aa2c7c8. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZES72447115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511a0db72c61b6af8b7a6538021823d9549861d5b82319c1c91c0f1d273ebcfb. 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/QZES72447116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068c7422e99d89180161f0925c0736e1e24d11a3b4853b0b44e7a52c9c2e2bc6. 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/QZES72447117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5c8b1f4b6709d89ad0a08665d1f1e94b4961764ea37b7ea603cf0cc6d1c2b5. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZTAU2228083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02005fe6bbfc5752690f65bfeb316222d52bf4672d068c3c8d5a3602631c95c. 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/QZK6K2532857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6141efc62ed67a7b7145d889c80db3402b7bc5c26a7f5352d83b1f3ca33e5d77. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ7W2594539.