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 0x953c0cc8b4def62bf3f4e40865e57ae1e1ea248ba9e9d5d93dc4b9c64d6d8e36. 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/db352b8c-1737-4087-bbba-17d79979fbaa.json and https://artists.proofprofile.net/proofs/artist/db352b8c-1737-4087-bbba-17d79979fbaa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mix Bareto: Quiero Amanecer / Cariñito / Elsa / Mujer Hilandera / Ya Se Ha Muerto Mi Abuelo
Mix Agua Bella: Te Dejo Libre / Imposible Olvidarte / Que Tienen Tus Ojos / Comparame / Voy a Buscarme un Amor
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 0xa84c4e0099ac6c43b952d7dc203382cf9545de23cd43efdedbb28f070000861a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAFS2124182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307707d06cddd7ac0a94f6525068c0abe4c90cf10224b635f0498f3ec0556b25. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/TCAFX2103837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3904691f6ea74fd3ace58e1d2058c9fb07a682e1953302bbc62e6b03749856ba. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAHK2365236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5304737205d3f35bcf1ffae74ef4f61a9a45c4573ed0011d46a1758eda3fdb28. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:25:34Z), 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/DEAR42579884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefaf75d654e7f44f3e41dcd9badf6fd2f9ba37f9bfe46339751b5079a332a471. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEAR42580517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3aa9a3382189d594c6301d2a4f81f2206fd118910728111b6f9201ef419ae1. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:50:55Z), 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/DEAR42589011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8b5ffaaa6edbba3bf584ec3eef678bdaa79a050b51cedc172f4a3c2157b601. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEAR42550682.