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 0xf4bbc0d6419ec85640e378ded7696f61388463ae13726791db485565040be16e. 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/f1cb47e5-2e46-44f0-a8fb-c12715193997.json and https://artists.proofprofile.net/proofs/artist/f1cb47e5-2e46-44f0-a8fb-c12715193997.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 0xe5688db2a347258bbda33b55144a83e44a1d6d7e5bb1e0ce601bb29e77104d14. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCABF1281741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cb7698c97e6f0ee2a41f27139bc812a1b0f41eba30ebdcbd3cd8bcd60f1cdc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCACH1547349.
La Cumbia Triste: Tributo a Jorge González
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d40ba2943ddd73ad671dc87509223a35766b1d8d60737d151a076d351229d43. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:37:06Z), 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/ES71G2038170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdbfcae15b0890df85268671ae8042f25250b4836ef8cbc53f3399a74a0ac94. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:29:44Z), 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/QMFME1916114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25aff20d8e4e6d127a3cebf05ed7c73fc751c3583b0e78b4ef7d79b7456147f8. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:37:25Z), 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/ES71G2204634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54be49e82c15f166157891649d3ce3574e10c612b9952f3eac74df6aa4f6b789. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM4TX1955143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6909bd5f97c15d98226a985c1b349a93395f5fcbd672a0f643337a0f03518b05. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QMBZ92534394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67040ee6d423d5474dbd83454b19626a7911ea7cc4d5f1793786294587cef98. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-21T21:35:45Z), 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/QZHZ62126918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18a994e1060353e7181c3a7ed5eb62450e20230bc1b55bcd693e3adc5e00052. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR96X2315906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67449e8905b6c13226564edbe34fe9418c9cb0a34f0fb38247d43e482040f31a. 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/CLKT21902098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019e62c19da9dbe92d874c1bb4e7a5ebc79eecd97149fb3929f6b151dfde5c40. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG1706591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925b07f2bc214b80df9d41f0c4500373531819475f02fe4282a1569907d4f5d4. 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/ES71G1920909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1a16a7012fa7c74b3875ca19b83cd656a46c6f27e73a55b95d61aea18a34e6. 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/QZGLM1908838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8863fdbfa90b170ceb946eece28bb19ede26dba783c4088fa4e309c748d16105. 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/QZHZ31909663.