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 0x40ed14e4d4f856aa095691972689f890cbabd9e63b439ed96653444b15632ffc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e75ad375-4413-40f9-83ba-19bad094ae28.json and https://artists.proofprofile.net/proofs/artist/e75ad375-4413-40f9-83ba-19bad094ae28.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 0xe5b1b20cce319878f54c0e5e40d80616aced2292c9e130b364c4e0cc612236b4. 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/QZMEM2118247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347dade3190a40e012e49f4bb62e09dfbc8bec6b193d5b363fcd7af6842715cc. 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/QZK6Q2117202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369b232d2365e32993cd8b08a8c477e5fa2a28aef73c0fb163e3dd747a6201c4. 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/QZPLR2162642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6a541e93cf61689b10c28e1fc899f748cc5c11c00073db0963f486ce51d1bb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZPLR2162643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31ad333f776ace7feaf163b25e2aee5c33098f2e9ec0dcd8e122ddc9a50db3c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6N2104728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347dade3190a40e012e49f4bb62e09dfbc8bec6b193d5b363fcd7af6842715cc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6Q2117202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0736e4edf56ecd73898dd9385b1fab8463828bd35cbadd9e50ce51d4e03cbf3f. 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/QZNWU2013248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ddef335e24c472f3d33c219123112a6b4ebd417ab86a18ffc72d2ac579c095. 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/QZHNA2113960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed1d574e97e4040afff5caca8c514948f8074b4b1ff2b715f9b0ac3791ff684. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZPLR2162644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc480d522543b64445ad2d73c532382ffdc7623a1a366d79dcfdf7b891a09db3c. 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/QZPLR2162645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145f43c0e3e50d5011af56b5b6c99b85ed6fccac90069d3378979586df28b488. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZPLR2162646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8a86c60a9687dacfa8189526ec9c24bfef5966d9c496dea4ee3744dc9ac866. 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/QZNWZ2013547.
El Perro Orejón (Huapango) - Bonus Track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b1b20cce319878f54c0e5e40d80616aced2292c9e130b364c4e0cc612236b4. 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/QZMEM2118247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb30540577e464f26ad2b6ee5ee8039746a8321ecad4465187afa3c36076821. 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/QZHN32560469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6a541e93cf61689b10c28e1fc899f748cc5c11c00073db0963f486ce51d1bb. 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/QZPLR2162643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09904d70129291f034fd3c671e7f42b7810f68c083e85c53fcd0003bc91b01d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ARC572210098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f134b5e3d11930bef6bbc45f35e2625d8585e052a7a083fe67d846a0f8f1ef. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6P42377504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f5ada0be191d8945828350dcfdb171e5fea6c15491305811d005efb5194bf9. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:04:26Z), 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/QZFZ72147595.
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