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 0x8018f72c917607de96577a3c0baf71856d2e03593a456b0f5b9d0aa906507e16. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7af7e02a-9dd6-49c2-86ea-ff58e4f30512.json and https://artists.proofprofile.net/proofs/artist/7af7e02a-9dd6-49c2-86ea-ff58e4f30512.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 0xccf6ec2681ed579dd145e2f76d5739b63e8bb0d7eac10508720b3248ae793e21. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES5701800827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ed31c1f85c8a6a49527a3e99011cc0dae4d46a168d6caa9dc19e7c08047d51. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ES5701800901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d315ff9e8c5898dcbf0be58f7102f7e64360b512a62f1d209c42bd61765b1f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES5701800903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12094767e1185986d7e7129f31889b56773e3ff26da681cf0647038e89a68c1. 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/ES5701800902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3e84cdc68e6a2d4d5c33528e19f9c91416239e3cd0c1d8950fa8e460b80d56. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES5701800908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefaec0653830b8f174cf3d06e7d2658feeb40331e34b3dffdedac706029899c8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES5701800905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcba663e969e30477ac2d9ca0e50d9cda38465e253a0229bd5fb64452fd4694e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES5701801071.
Fuente De La Medina - Taranto De Almería
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1782cfd4dc7dafe06afcaad2604e3eeff7b47139e49267c4eb32761126c07bec. 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/ES5701800904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8206e7990bb22d3140ffd95754a2b4f38e7b34ed0a251cb2df3849dbefb3c57. 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/ES5701800906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7692316d64829a225ad29472c846be115a012eb94fb5d3e6e368f6eecf208eaf. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES5701800907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303ff9e6f88ae7486350b2303cdfd18fa5754c9d0010bccc25dfe80e1b379ce0. 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/ES5701800909.
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
Como Han Pasado los Años (with José Mercé)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe07632b1abf0d57b25fabc02781f2054903357b8294546f8e03acdd6805053. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES5021300710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc765c1f3b75531d34b833da08842aae137f11b24499739f1da362027fb77192. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ES5030000235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a7a81e270749557b6dc06fec9f0047e22a8cba1e11464a834b2e58130d3dcc. 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/ES84S1700318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c659fa7434422f628e827bb50294e02f1653b0a8286eda0fdf9ce0ab13b3ca0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5702102128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf986920b9ae17af2a4e284354164c3c911c3a54b59ec69d490f66f424918ed9e. 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/ES5022302464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf986920b9ae17af2a4e284354164c3c911c3a54b59ec69d490f66f424918ed9e. 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/ES5022302464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c98f30910f300127f12a914be5ea16c70396c098ac4f5e9d69d326e3b156b8. 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/ES5701000693.