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 0x07072b9a28fb65842a6c1d0e03db8dd251e35e57ce8d6122445cc24afcdc0fa0. 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/af46b065-b24c-4c89-ba2a-f9cd314acc09.json and https://artists.proofprofile.net/proofs/artist/af46b065-b24c-4c89-ba2a-f9cd314acc09.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 0xc7b8c565c621807958f7e1ead88ea38e5e3a991936ff12731c063b4120da58ac. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES5020400437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68d0cebdfa6a1dce21269fc400a0bd041b4ecbaddaf1bbf25b6f31ad85398d1. 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/TCACU1659500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86fb67e8cfb8eb5dc82d94f377ccdd3167f078bd1cfcd4c6a553adda70c6123. 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/ES5021200964.
Nesta Esquina Do Tempo / En Esta Esquina del Tiempo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84115f773b04c448b2d3a2601462a09f40fbc5c188fde8ac61e451d5f3632c6e. 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/ESAAI0219749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86fb67e8cfb8eb5dc82d94f377ccdd3167f078bd1cfcd4c6a553adda70c6123. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES5021200964.
El Hombre del Piano (with Pasión Vega) - Directo Especial de Navidad
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44229595d2d894016ea2db97d71dc5e2593789d60130a2198dbb89e21de636a. 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/ES5021702511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005b80026771c1cdcd73a68bf902c3eee416c5e3b21a350bd0dd5d093653662f. 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/ES71G2058642.
Suite Festiva de Éxitos (V): La Sevillana Encantadora / Perfiles Morenos / Pueblos Blancos / Tierra Andaluza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e21181c07d47bdec1fcf392eb6727b0558ede052b2888456faae109c2e31916. 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/ES5701001337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfc7982f3ea44009b36a97d84a9bf23b6a6e24ddd6237e862aabb619a355bdc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES21S1300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34f019626da48071a20dcdabf37d9f7da25e26cd2799e2dfed8d694ca6b3b29. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES5020300314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e61ea5ecf3db678790dfe453f8a6f7183490b2eca5e177e9dfc8c8a058236a8. 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/ES79A2117807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4720852eef42a420a27558e131ba4689eb43bfed02bc1c4a81237ef8ffca3c99. 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/ES5701501321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb317e4b043479880efe089b9009f4e5aa1245d208cedb86c24ba689578465e8. 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/ES5701501326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc6aac709dbcf66fa03c77d3960c19d461886f55744a302a52c31ebad4fd5d6. 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/ES5020800534.