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 0xc185c3e7b046074bcbb130271ccbc16b2458a8c885bf77a7f066dca5ca9fe28f. 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/44b7ca27-5dcf-400e-942c-66194c1df1a4.json and https://artists.proofprofile.net/proofs/artist/44b7ca27-5dcf-400e-942c-66194c1df1a4.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 0x37dd4b1114f6ab68062012c06287843b79c098218054b5608f7183f602425df1. 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/ES5107400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38e48a74793705c71e9ab9fac86ebf34e93f560e9b2192b833cc71de61035fb. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/ES5107400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8c7413de8f94d65f191c3f7162c459549f4d837bb8288a42aa68b7dfa3cb74. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES5107400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e53ec4778c51417058338254d95b392b96d6277b974e322151ac28be30b8593. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/ES5107400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab3e90833e8108907e2a095ee0733e4fa212731228b27db900a1deeb0d4e3ca. 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/ES5107600030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b48512b01b45fe006324f8600535be7b5550e45b867f6216203b4245d505247. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ES5107600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6a3f8a171f2351bd3b69fcebe2808232f766cf5749d185e5f2f603cf484100. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/ES5022301664.
Folklore De Andalucía (Remasterizado 2023)
En El Nombre De España, Paz - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd90c0b1227a262553ff06442c614bfa2f88cf607cd1b3ac441676f39c55ce0. 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/ES5022301775.
Concierto Homenaje a Eduardo Álvarez Heyer (En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8420b668657cdb2d358f27f6e8c1d2d4d1468025c14205e6c8a9a5d44b638221. 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/ES5107600029.
Cuentame Como Paso - La Generacion De Los 70
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca31a9e207c1a48b21cc43e6808ed72f150154aec5a3f1316c386358a12723f. 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/ES5029601110.
Coro Hermandad Nuestra Sra. Del Rocio De Triana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa054573eba4cc0a756729e3ab4f594e767f21dd2a79f345c2319c15138be71ad. 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/ES5029600131.