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 0x161aaa334ef881856ee7a8ee93bda6f6c77d4a05b20e1c28f3b42d66b251847b. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c57af1b-4565-49ab-a3e3-69c5fb701559.json and https://artists.proofprofile.net/proofs/artist/6c57af1b-4565-49ab-a3e3-69c5fb701559.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Colombiana: Mis Primeros Amores - Remastered
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 0x1acd3067a4e305111df9c1046a612e1e51712e04288d4afad4e586b63b8c9e0c. 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/ES5271700201.
Fandangos: Los Colores Me Lo Niegan - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32745decac66762fff9e6fcdc2c8eeb92407bba0665044d57f193617976e090d. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ES5271700202.
Soleares: Yo Creía Que el Amor - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa593c03a1ec12f28c12466afd8ae2db64792e7c2ec43a14b26aaa0df3eea9054. 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/ES5271700203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e2b3963362bf7dcb8feb1a50edf1d088cdd42dc9610f0de02479b728c00942. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/ES5271700204.
Fandangos: En el Libro del Olvido - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e8ece4eaada49c08482fec94872b15bf25c797584703e80f968c9227506aef. 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/ES5271700205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9c2e979da10f120acc3f4a063ebdb8ab14046945537ff3e06a1d0ae20bb9f3. 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/ES5271700206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848622f87950c391e4588ba301f08f2c30997c26cc7ecaea151b414c639903e9. 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/ES5271700207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dde08697a0fca458e876e64e5c61f3a1914c0acec1d78b30fe5fc14786dcc65. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/ES5271700208.
Fandangos: Que He Perdido la Razón - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b86c8ac7fec71e1b64dca4a51b4b446eb4891d0e0cc7a071d254ef984f3798e. 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/ES5271700209.
Colombianas: Te Empecé a Querer - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2517bc7a975da6e4f430f437db98e2e8c1de3b959e1d1b530e6a95c784960035. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ES5271700210.
Media Granadina: Que Cruza el Puente del Genil - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bdbe16506bb63042573fd01bb4deec870f3e22e36ea5f8735214580303b39c. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/ES5271700211.
Alegrías: De Noche en Tu Ventana - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd543a805c56b45ee76043a0fe82db47bc0885061897f3146a9f981e54a249302. 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/ES5271700212.