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 0x0d64c5d1bbed7a37c3924971d67bf2d5729bb0d97c44c775e6f32964cfcc8eb9. 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/569e7ada-8579-4508-80f6-2b66bd69a241.json and https://artists.proofprofile.net/proofs/artist/569e7ada-8579-4508-80f6-2b66bd69a241.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 0x5be81196b5db9e4c9521db2eff7e353ad532560a6fdd7bca205ae7d3b1f952e7. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/USDXS2304347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392d34d64326c210e2a1f44d8b4260ce73881abeedc0c13b4ec51f815c3951dc. 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/USDXS2300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae49a5d0c2ff373b9a91e3ac1e29eb07d7563ed36e5aaaf7e9ab4f1c4b43f2f. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USDXS2201172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733d38efb801d30faa18095e89944eb2c981bc3c64a76baa47448e4aeb669f2a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDXS2201178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169a44f5691f56ff4a9c727c02028ea8ab29d079990241f92a12139ccd50e98f. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USDXS2201179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc1ad44ac86e5ea77ccc036038cf35829757ddeb96cfa7224a6ee070c852a46. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USDXS2201181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdc880c7665f3c7d256435d70f3c7c5fc61f3ced43b42c845f2a7ea599ec495. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USDXS2201182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ed93d0b0197258c1183cb575f81d816b8120478f862d0b4010ef29ea444feb. 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/USDXS2400820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e72df5747122a915d7085dfe1dff904858ef032f00c7536345e9ada0d3c9d4. 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/USDXS2400245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d680cee60930de21024b98e73f9883cf2ad609c249f05de57a0893edbc4786. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDXS2400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe66944c5dc299009870f2296db7e128bb810b2c860fe35a9bd8c22d91f6709. 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/USDXS2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fec2c6f582fd20eb30c124b4aa2b58e5a06181d9747ae025fbb162b1376f4b3. 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/USDXS2303568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfba4918459efd3892281bdb1c3b6f80a7ec8c0e0c3a1be3a71e1592579f309b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USDXS2302568.
Popurri Doble P (Ella Baila Sola / AMG / PRC)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754ccc039d15969e7144e719f3ebcee992769db122b142a54203d415454d1375. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USDXS2301762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abb359a98c1963bf0adc39af32fe202918e01ac34c5a5d9aad84186e7260ce6. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USDXS2301761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20bd60cc1c18a4e74016cd096adf0e094615d426ff59bb0e3e2bf75adf005b65. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USDXS2203249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65ac44b4ade829e66b3f85c5c0c764c7b53c08a3fa3d46948a92bb39ed171db. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZDQH2157267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88798987fda494e5bb630dd39beb9c983c7a0e9c3b99e4cfb9c0d279d9dfa4e6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHNB1999569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591afc05dfb1fd9d6b76f2ca55ed2cffd9640acc74cc7991b6977988ff80f6e3. 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/QZHNB1999570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7dabebc9c4d722224eed02e9481149fa0ca33cc4fa386a610b01de0d29ffeb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDXS2400003.