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 0x1659a5aa4bc1d7c3d811d158db309e130c7f1acda13c67091c8ef0956c1e2d9c. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc1f0f04-e199-46ce-ba8d-6bf354a30177.json and https://artists.proofprofile.net/proofs/artist/bc1f0f04-e199-46ce-ba8d-6bf354a30177.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 0x60e775d2e5be4f4f8cfe6aef024384c62e7046b0940103fb5ff38234ab38ef05. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZZ662473732.
No'Ombre No (ft. Dulce Coco & Chamir Bonano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b632c0ae1ea80396cdd96cfc84e3b1232231799c83363bc07758430030fa26. 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/QZZ662473733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3d40288f4e469790ed7683c2e0ccf3075bdb2e656ea72e042bb45e746eea43. 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/QZN882306437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe152875623b6a5a0eb5d7be8de0dfb656315c3eac316ee001beabdab25ab809d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZZ662473734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb365967939561e5df9d05aa1a899b9f80d63ac1e593a69a8af756f09b62a6f7a. 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/QZZ662473735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacbc6e9c65f16fba808351fff16082223fb84938f3c46f5e567ec599785bdd3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZZ662432091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b8cdd250a322f00484facc036466463b96399b663b1fa5da8ae991e486ceb3. 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/QZWDW2223437.
Las Playas Son Del Pueblo (ft. Rashelle Amanda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd783c5b4ce0bdc3024236cb1ed48928cc43d3661e70d3e83782aef947b6a3783. 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/QZN882358838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e41f1f57538f5b8b7736271e91dc922b7019afa6b242e976b174f333f2efc2. 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/QZWDW2396664.
Llegaron Las Cantaoras (ft. Yazmín "Luna" Vicente)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed2fba12420329b2f558105d575dc05b8a4b21d7302ddb2c895b7aa023e20d3. 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/QZZ662300557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeba4fee4aa5b213ea97ab6aef64e0489e9eee18f5ad929e4b6cd81997452cf9. 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/QZZ662422951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0361f00ddaf3de56b019c48bd6e1929885b7ecbef9f470d1d7454ca83ccbbedb. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZZ662473736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749784ae6f674c91a56c189eaeef7d22bd2f69f41a5e3d65900e7669ef541f5b. 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/QZZ662473737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0832ec68d88203eb361ec9685dd851f91dd85e890560955f1b53f55a95d396. 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/QZYFZ2422952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeba4fee4aa5b213ea97ab6aef64e0489e9eee18f5ad929e4b6cd81997452cf9. 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/QZZ662422951.