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 0x4a068688f36271f74825d3b61540942e404d082cfec2b1d93cb426d90a6ec252. 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/e1783bb9-2b92-45fe-a237-be1bbf9fa0a9.json and https://artists.proofprofile.net/proofs/artist/e1783bb9-2b92-45fe-a237-be1bbf9fa0a9.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 0xb3366ac11af1206c5ee1a5ae75dc3cb448f7f8dc8fd0129819d0661575eca590. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USL4Q2052827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b0f57c8a912a71defed5bf28304fd193528511e9f211a14e5c1141b3f10ec2. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:36:47Z), 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/USL4Q2052828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1f224f1fc4792405e157b848eed6bbb57dd0982e602f11785062dde15d76fd. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USL4Q2052829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c541daeeda10edcb346361e4fd0b780ee38c299defc6357678dc60cde3a8a9. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:27:01Z), 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/USL4Q2057789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b33ca9586bf6006cdd87e3e751140f5a878beea02966f7757073eb662eae8f. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/USL4Q2057793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f7bf9c781a6da931e51708c8e2fa992177e444debed39f6520022016ec1ca7. 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/QZWDD2427250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738bbf582e65864ce0a1d4b61e0f608769c7b1f0b4f9333fb1cf2dcde76269f5. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:28:49Z), 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/QZTRX2429991.
Pajarillo / El Carretonero / Jaripeyeras - En Vivo en Oaxaca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7adc02ba5d3ba489bdc87464f060c9c991f41153ec183a1802290daa2382130. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USCGH2487882.
Rosas / Tanto Amor - En Vivo en San Luis Potosí
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d47c0c388a2e69758049a37674169ae03fa5687ba36c8dc4aa0cf3e0bc5ef4. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USCGH2487894.
Dios Bendiga Nuestro Amor / Le Hace Falta un Beso / El Cóndor Pasa - En Vivo en San Luis Potosí
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925e5cb68f899ce0c70aa2021aa758bdf36158711096f1c421179194f5a3d7ce. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/USCGH2487887.
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