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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bb743ba2091ea6b90a6970f9ba2060dff606b7a787b1fe38b0b2e4123085ba. 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/9ae05c07-f0dc-4d3e-9b74-e68349e9e67f.json and https://artists.proofprofile.net/proofs/artist/9ae05c07-f0dc-4d3e-9b74-e68349e9e67f.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa12a7b66b831290352557e752e1a1c85da8634c5da5be24874cf3ed776df512. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QZNW72350167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b99e21d2fab17a010d0730e4c9b5476e37fb51fc7eaf488a08f8975b80bbcab. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:10:22Z), 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/QZNW72350168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b836b413f228129ec4a90488ab25274860342590d93bef245b34a22b37326a. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:24:18Z), 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/QZNW72350170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca5899f374d1d0752fb99c2e5f9d0db41abfa020e5bd9a3c5a76c2c295854e0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNW72350174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd371039a0dcd94f5714acf72acd45a474dda7faa3c63ad85c7b2be17703755e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:46:26Z), 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/QZNW72350193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd8db31bac4fa90b51ed630e53e0e2ded88a07855c25612296fb658a6ecb195. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA082233020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bac1a11fb6a2822703dfe3a3d8f1c9e396258b98c20b4c1500815187abf97a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA082233025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957f6dc33cb8050427a1ee86710e653a03e8577f38e8e2e92929bbd99480710f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES71G2243556.
Mix de Pandillas: Doña Guillermina / La Tahuampera / La Aguajina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55f69e6d912e370e0d40167f0b9da571dbb28c36d8d33096016824390fe6842. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:29:06Z), 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/DGA052299268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26439cfda1219289e76c8198ebf1e629c4627c6e1d2c46fe4767cd1ea6725810. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FRX201799754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf74a08ebef9ad1246a4d3de4a574697517d8f4e928214e8e700aa8233cba2d7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX201799764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a08d3ff6956dc042c995d21dd1fb8d52665734008888d680ae84cd4e842ebaf. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ES71G2243756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef661f475ebc6736e1f0da727abe53f6cb7b6b6f6e52f2ac2f5bc49abd1493d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES71G2243758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5ddda7a120909b7060cdfb81a6d653650e28740224f1be21555488f0568020. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ES71G2243763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee8cbda824b5931fd03ab614179c40ec6392108ace69018bebc098303348eb5. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:58:34Z), 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/ES71G2243762.