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 0x079a2a31fbf1965bb6069f2903bea44fa5220474f86cc9f4d797747914a04ade. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f164aef3-5a42-45dd-b33f-b3d943d6830a.json and https://artists.proofprofile.net/proofs/artist/f164aef3-5a42-45dd-b33f-b3d943d6830a.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 0xe8948e3ec061cee9fc730be8ff93b03594aea33be5e621f1f3352bfc78e2e4a3. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/ES28B1000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b15b5ad5812fbb790002a8f707b1f5b776bf80b10c06c778741e934bc9836d6. 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/ES28B1000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b61f56bf5daf8a7b936fb0799aeeb26a87e10239f5357f3f5aa569d31a29113. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES28B1000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4041fe32ed92ef664924d0cc3e452d86615ca85266185e25a0523e97e675e7df. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES28B1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f626d8baec56223275f185d2395b0b96b854761a41ca57c04dba109c4e01adf. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/ES28B1300011.
Guardians Of Dub - Dactah Chando Meets Umberto Echo
Ring The Alarm Dub - Umberto Echo Dub Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3388f6205b19933449afdf45e185a592993cc96654581a8704773afe1e16e45. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES28B1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff65d6e8128aaf9734e8d7e8bb6bc31c36b0b4b655642284be31fb631c8944ca. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ES28B2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f178c2cf5a786e2f3249d33e7181b9cc958911c38652de0deb996e880dd4f62. 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/ES28B2500025.
Sabiduría - X Aniversario (Roberto Sánchez Original Mixes)
Ningún Hombre - Roberto Sánchez Original Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c1148228e998288c0d938f8ea3faf1262e428b39dfbf1ee43878fcc4e84388. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ES28B2500012.
Mantente Firme - Roberto Sánchez Original Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa038960859d9ba2b8176d6d8985313c5ef12a44473910e11c1cc77717f3a31d4. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ES28B2500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec0cdbb710abc19401c5dd5ec7087c5779c0f4268b2a52122d4bcb33ca148e4. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEZC62328624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1ba78ce467dc375c764667426a3fc4b9d932bc9d819741b95bc77aab7022eb. 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/ESA011302545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2accea7ca1819b4b50c538f794560fe1a6d9cdf22345c36be5ffd496c8e6ddd1. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/ES28B1900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb261033f1608e0f9a6f384a59bb911bcef9db1bc9f5c2fcf928f87004dddb8a1. 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/DEH261309208.