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 0x66ca140b92ddaa5aa0dc389aed9beec70a8f0ebcbabc4c933856de7f4f19eb4d. 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/9363c429-34fb-46e2-b874-abeac4d51433.json and https://artists.proofprofile.net/proofs/artist/9363c429-34fb-46e2-b874-abeac4d51433.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 0xa9131a4cf6dc59994f1fdea8ad4059f5be1e046934aca886d14b58027154f1a0. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:56:46Z), 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/USHM91255432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a729542557568575c9b513866a0db951d0b74c7ec79dca0ba3304caea68257b. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:27:10Z), 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/USHM91255436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f2d6c5b6277f6e139f32210398efeb35f896585e38e196430a18b7f95f6bb3. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:21:05Z), 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/USHM91255440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949216e43e5668093129d61b5dd3e6351108b5bc17226659a72c1d7d1f8c527f. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:42:40Z), 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/USHM91255442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646248c873a45723b92b2162ce1419ac8526175dd0f025f73a3d619ead898965. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USHM91255444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7763a978d0dccb594a7b32ddbbc31234d077746109e4a54f6bbb7aea12fc00. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:11:14Z), 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/USHM91255449.
Mix Zapateados, Pt. 2: El Mastuerzo / Juan Colorado
Raúl García y Su Grupo Kabíldo de Tuzantla Mich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b4b8d8b07717d7382736b8e7ba3b3b91e5c85456c00ace83fe30d75accfc5b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX202073546.
Mix Zapateados, Pt. 1: El Tecolotito / Morenita Mia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec4b6d14c0ac4d42efa201d75a3e7d83245a480a28e478bad744bd67ccb25df. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/FRX202073539.
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