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 0x9afa333a529055448765e6c56a995b4029a9a900213c17a849b480dbe74599c8. 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/ece718fb-e3f1-4c5a-98f7-4b2fb81ed170.json and https://artists.proofprofile.net/proofs/artist/ece718fb-e3f1-4c5a-98f7-4b2fb81ed170.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 0x40a0c8d9a3bbbb1d938ea5437a7d2c9083d2ca5671dcbff282238d798b8879e7. 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/COA6W2100617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2e17f6ca24f44ec1bda178a8ff418c6750e6c0186b67f64cf3ffb7e8bf3d69. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/COA6W2100618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3752ae97635b6607485cc4a66bb74687d2cea92c994e446af2268e5ff14d012b. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/COA6W2100619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1542043fe5399294ab361646b32fcf4fb60a0f2cfe9eefaeb39e6eb85889362e. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/COA6W2100620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7881aba3b3d9a28466fac805cb2c2cb310e2578ce415d3cae296fbaae74989. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/COA6W2100621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af23ef1de37a6d0aeb2c88d88f50b6b9b9d47bbb02dd5555ceee3853ac1f614. 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/COA6W2100622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b2c2f00a9f849f589a47de2c6acd2e1e0e709f5010cce0eab057f74330a4a7. 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/COA6W2100623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8bf2e0b492d93b9649acf48f507685eeaa5b3589de6e04f067250d74b4806b. 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/COA6W2100624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d45f0a122c964539d5e217967928b294b0fd249ddf852d06a8367f93ad856d. 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/COA6W2100625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287a0c337e36638bf2a098c2cb6bb0fe723062ebd45b1485923017d3c9766238. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/COA6W2100626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd5cf60af0cc16b93010dcadf9df1686c5848900539f0893e52b73f1721c8d9. 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/COA6W2100627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce03587fdb8a326a5daa2d74ad0ecb3c2a90a3d5c840257c9afd5cd783f76ae4. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QMBZ91630381.
De Guayabo en Guayabo / Alcarabán Compañero / Vestida de Garza Blanca / Aquel / Indio / Adiós Barrancas de Arauca / Laguna Vieja / Como No Voy a Decirlo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95417caf8281116d0fd53982042f2283ea177d7aa03c8888aca6ca0d493c385. 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/QM6MZ1899553.
Fiesta en Elorza / a Quien No Le Va a Gustar / Una Casita Bella / Seis Numerao / Gavilán Colorao / Pajarillo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f480ab53bdc6a453bbad64f32528b944bb0e4f6b574be29116d655f4ea02c2. 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/QM6MZ1899558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5edb7bbbc48546773377431a878b2dc28a9c47b2788c73c71d1a0b9f07a51f. 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/FR10S1657649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa764b04ddd12dd9bebeeabc9fb15d309b345b31c2df1289786e13327395dff6e. 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/FR10S1672825.