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 0x25dc3aae062611049ab59f2c7d49a86be6f403ae37b62be9c78b3913bf3eac4c. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4eedd845-4dce-4c27-92e6-b3a4f4d596e6.json and https://artists.proofprofile.net/proofs/artist/4eedd845-4dce-4c27-92e6-b3a4f4d596e6.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 0x57d4aae95de585689143006a9ead16a364444495a03b11bbf8e52056ec3c00e8. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/UYM129900240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe89279b638cf9bb7d858e0b0c2222354601b76bb6d743f026af4b366c3022e. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/UYM120700033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e233be5f10652f014d5a5b9163fa684396963b7ea445d6b592852ebbf341c4. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/UYM120000651.
La Coleccion 1935-2005, Vol. 1 (En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6d46ac8bd5947dba17fa0b72cbdac9fd343936230d8763884ad006bb0f1d59. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/UYM120100116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cc2808c857f65c6c8480b9344201e492b1b68656bfd311ef7876cc3d6d5876. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/UYM123000828.
Araka La Cana de Cadiz - Los Inmigrantes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f54f154abe89bb9d903bab225b1f734a54fbd013368a937dfc27265b1dabe8. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/UYM123000829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83524761b0ddd0ffbe314e3f966de2752e5cbdb7e8bacbd514b97b820677764a. 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/UYM121400345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5071cb6eaefc6e088c6fb8ab5105f1835aaf0dfc29e1cea473aee3b85419322. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/UYM121201931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71443c81c6096e216e49779870a609d989fdeab2908cec58fa599a9e4c253e28. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/UYM121201935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52295a8ce78d2b2080c22b823871348f5e255212effdfdacd28fdb58fd006d5d. 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/UYM120000365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d107d108d9660081523d838a212aafadf185c1c36d9e9e2577ffdde06bbb4b2. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/UYM121301952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318260a92106791da28d2038676ec6bfa68651fc6e22ccfb9a17980f063f9850. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/UYM120200284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d107d108d9660081523d838a212aafadf185c1c36d9e9e2577ffdde06bbb4b2. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/UYM121301952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe89279b638cf9bb7d858e0b0c2222354601b76bb6d743f026af4b366c3022e. 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/UYM120700033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea00d2e3419ea00216ad0358437d16400c95562342d1a0f23c68f0a46cd3bfc. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/UYM121800208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc5ce00ae1d28f38e5d46b8047a259a785a95b1241bdac57da3c378c64fe0da. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/UYM121901012.