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 0xa9beff6827a9ea1d5e0281ada7f57852479eb50d9225463bf87ac23dd55e69bc. 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/b2a167c0-31f6-4622-ab2a-8f949a1dd9b2.json and https://artists.proofprofile.net/proofs/artist/b2a167c0-31f6-4622-ab2a-8f949a1dd9b2.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 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 0x519ca010b55d8bf4fb9c6d0c361fb3183a9b65b2b4e2e3c1fc821ea3751bfbdf. 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/QZ5FN2126845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dc9d6e79aaf0a5f17baf1e038a641c580cf27d229c4f33682b9fc423beb4fa. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZ5FN2126957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fbeb277332ba755df847e97e266974ad07c25854a7a5ef7885634e700d65c7. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZ5FN2127140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde233268ccb2e1a1536cdaaeda06c646649783db66f53fd46d9db0aa5c7f9e65. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QZ5AB1875226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90084bb61c11492b24c0e86812fccce63758aa89e7ae8eb943d5b5d5c3a32950. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:01:22Z), 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/QZ5AB1875227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18673fe6897a7405167e56ff50f9b1418a42779fe193b69815d641219478d4db. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZ5FN2132725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95e279ba7fbcb41f2b7406093f270de8b4ca23c80f9cdd0f3c7b1a944e29ed4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ5AB1875126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c33a783adccff926b1db5eca36b511c4f84e1cf29aa2f6103721b4d492781cf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ5FN2132668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424e3d3b80b1cc92a8cacfaaad7d89035878aaab6f12a023c1edbbda47e046aa. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:01:10Z), 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/QZ5AB1878994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4593bc3b86a648fca1058d93da92395dbc700951cb53930c8e15fcdf091966fb. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZ5AB1878995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916fdb261d0e38411e7fc479103980046bc9e0200931b0e766c624459588c703. 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/QZ5AB1879002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1be864535c95d5510be525640669954d03a5496ae05d1f678878fcdf151ebe8. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/UKXN22307389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcf9888a6ad178fb4e3bd7ec54cd9a276b492e9f3facc4bd179b52a3bf08cfc. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QZ5FN2128708.
Tributo Al Llano: Apure Siempre Es Apure/ Amor En Mi Llano/ Mes De Mayo En La Llanura/ No Me Dejan Que Te Quiera/ Las Coplas De Pedro Emilio/ Romance En El Matiyure/ Lágrimas En El Tranquero/ El Yaguazo/ Contemplando Mi Tristeza/ Doble Guayabo
Ali Cabello Contigo: Mi Presentación / Señora Linda / Amor Querido / Romance Y Coleo / La Despedida / Llano Lindo / Por Unas Lagrimas / Mi Mujer / Mi Historia, Mi Mundo / Con Ella Si Soy Feliz / El Caballero Del Verso / Dos Corazones / Catira De San Fer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba0ec10748784d45408f5d74fc26100a15fcb739420762a3d33d468cb2addc2. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:58:55Z), 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/DGA0S2491319.
Homenaje A Dos Grandes Glorias Vivientes Del Folklore Llanero: Sentimiento Apureño / Caminos De Apure Adentro / Costas Del Capanaparo / Por Un Lazo De Amistad / Cucarachero Araucano / Romance Junto Al Molino / Me Vine Arrendando Un Potro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5e1d89437d91935bda1b12f21b331d883a08d80f2f92515717830d5f79b2af. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:05:16Z), 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/FRX282503337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc487201f0b370f4898e8883599a15f6da729d2c1be7122dcf8ae269264fdb711. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FR2X42586125.