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 0xe28e77ed8d8766ccfd63917ba2181ab7984bdf69da003a4e1b24c559110bfb1f. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9235d1a6-d49a-48c0-9414-6cfabf08c8e3.json and https://artists.proofprofile.net/proofs/artist/9235d1a6-d49a-48c0-9414-6cfabf08c8e3.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 0xf620fc40cd04163d4dd2ad221bffec9231c575add6986e2de7c28c91d44cc58b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNFJ2300718.
El Rumbero / Julia / Cuando Toco el Sax / El Burro Loco
Conga y Timbal / Bonita y Mentirosa / Muñeca Esquiva
Cuando Volverás / Tu Estas Conmigo / Se Muere
Mi Merequetengue / La Negra Borracha / Yo Si Bailo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e03406d995560d001f25245d7218c734bf2842fbfefc2b7881461c2bb9a59c0. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:03:01Z), 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/QZNFJ2403296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2a9a9b02f5831d0aeb1f5b7369f3ed07213579255803130e6b581d01e6cb34. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:31:17Z), 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/QZNFJ2403300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a1b472e4e1833a48e6ec4ee3aba3487c6a37978c7fddd73194a97fbceac7f5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNFJ2405630.