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 0x77c64041bd4721da13f9579319534856e2f725a80a1d922625142bab1617ccc0. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1f94888-4bbc-4b27-978f-787d61e4b467.json and https://artists.proofprofile.net/proofs/artist/a1f94888-4bbc-4b27-978f-787d61e4b467.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La Rosa del Azafrán: Preludio: "Aunque Soy de la Mancha"
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 0x9b862b56be2e09dae0ba2ac74c42335b9087101ba0a3ee556dea29f4c5a07b39. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ES5025900037.
La Rosa del Azafrán: Canción del Sembrador
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13b6c5e9dc2971bb3c535bc081aada09c474fdb4ba22d55ddbf2ac7bf45fa03. 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/ES5025900038.
La Rosa del Azafrán: Dúo: "Ama, Lo Que Usted Me Pide"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb162be6886aabd8b3a1b256ecbf6335bf77e30ee0daa40c70eaec779b142522e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES5025900039.
La Rosa del Azafrán: Nocturno: "Hoy Es Sábado y No Quiero"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791a8c877be89dcd3fda4665a2bb79c1af0dc83f63c59233b07e299ba0a94812. 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/ES5025900041.
La Rosa del Azafrán: Pasacalle de la Escalera:" Dos por Dos Son Cuatro"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a3d7e518ee0d5f0e086bfa971bc9d3c7921564350dfa1bc451e69d5ce5cb1f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES5025900042.
La Rosa del Azafrán: La Monda de la Rosa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcf1fa78c971845785f142e6b40b9b5075b41c1fd54e307c04dc063e2de8dac. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES5025900043.
La Rosa del Azafrán: Si Quieres Que Te Lo Diga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a6d6bf15734a62db0834269440af06f2de836018eee3bdf26b59e9549eb925. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/ES5025900044.
La Rosa del Azafrán: Tanguillo: "La Juliana de Casarse Contigo Tie Gana"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ff78170be81e931df48272ec9677008789afdb9e06037ca1992fe520866a7a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES5025900048.
La Rosa del Azafrán: Introducción: "Acudid, Muchachas"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68911bb033992443aba5016b97d07ad2b651a0d679e602660f2d304e2281ee09. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ES5025900050.
La Rosa del Azafrán: Coro de Espigadoras: "Esta Mañana Mu Tempranico"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48d19feda1770330bcf575f89070dbb720f2f500884f6eccbcb9b4d8f6c4806. 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/ES5025900051.
La Rosa del Azafrán: Jota Castellana: "Bisturí, Bisturí"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3959ef134247b3571df5230f3b3bd1b6e6055d8c670476cf1b5a8f53115857d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES5025900052.