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 0x6ebe2ebbe5dadfa81e8f19da7ccf7ea0ecf6e81b49954b3700e9141e4ed2835f. 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/2735ae87-89be-454b-ba34-9d2d6d7c4bf3.json and https://artists.proofprofile.net/proofs/artist/2735ae87-89be-454b-ba34-9d2d6d7c4bf3.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Antología del Folklore Musical de España
Extremadura: Ronda Festera (Cáceres) - 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 0x830fcefd015192e1e548bed8cb9d15338507eafe476590f58df2b0f098e4c354. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601501 — a six-check JSON result.
Castilla la Vieja: Ronda de Enamorados (Avila) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb834ef75f8a2a7827436e3cbac635fffae29bddd61039f13b9b3789a446824c5. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601301 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201463a331e7f7ac916e67cb2e034e1e9fe818c04e7cb341320bdb8fe504991e. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601402 — a six-check JSON result.
Castilla la Vieja: A Lo Pesau (Santander) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e47f58a27a3e462a93716d7dd364305ceb792f81fd257ef804f6fdb8f291825. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601302 — a six-check JSON result.
Castilla la Vieja: Baile Procesional (Segovia) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574b3bb7e115302c41974599942b1ce3044ba52dc1f9952ab3b19b58860b86fa. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601304 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605c5d3d38d346cb65cb5d15f4ad49613a25b110fe86ab4ef1cd8b60fb2cbad2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601404 — a six-check JSON result.
León: Charradas (Salamanca) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ee55e34d542fd5a64445a6a24dd2d2467fb144e7aea0fd5f440a0bd1e1e12d. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601405 — a six-check JSON result.
Castilla la Vieja: Romance (Segovia) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d5aa11bbd6bbd1ec2efd3659baa90f64e4ead8648afc1df5afcc91b4e5c442. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601305 — a six-check JSON result.
León: De Majar el Centeno (Zamora) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2256aa11cad7b2e07bc2b9744777f06b49bc18458ffc0da1f54e9208ecbdb33d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601406 — a six-check JSON result.
Castilla la Vieja: La Pascua (Burgos) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd8506a57df9c03986c2f1eb2d13011da55e247ffa006e05bd65f0c3041cc60. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601306 — a six-check JSON result.
Castilla la Vieja: Jota Castellana (Segovia) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38307010ccf70c2d3bf5b9824c9429071a4a377a6d52844a0fe3966f1424043. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601307 — a six-check JSON result.
León: El Menudillo (Zamora) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29230a1e2f6e73ce67c7f28207d822a5c08a5ef94891675171aec9e8c5ad48a4. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601407 — a six-check JSON result.
León: Ronda Sanabresa (Zamora) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecf732fea71019b8ea846e287e5e36fcd585d59af0838362256fb8479894515. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601408 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b64e84631e66b7fa036cda2cc59fb871c38a94b47dab2b2adc0febc053dba0. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601409 — a six-check JSON result.
Castilla la Vieja: Navideña (Avila) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f92fb8cc539e9380a0444419eb142da99894ab752e30be47ad6a90a9487698. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601309 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410c6ec961c41063fb7073dcd324f3c5f2a6f66d45d5c878f273adee9c65f91a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601310 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3b6d882c97467cf2fba5cbcb7460cb882f55a32da6e622fd7775959071ec10. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601311 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46714006e86f065c3a9d2c0c8a068a545638e90d395a1cfb9a739bbf6d985dc9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601411 — a six-check JSON result.
Galicia: Pandeirada (Orense) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c96990eaf924e510b5c66b6114c9a12dff9dcaff8b6990bbaff9d22805e96f2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601312 — a six-check JSON result.
Navarra: Jota de Cintruénigo - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d18a91e97e30bb146abc8069c65fb7048148b3d1d67b81a4347e90d21c5f836. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601412 — a six-check JSON result.
Galicia: Cantar do Arrieiro (Pontevedra) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f074e3617019ea30031e7ef8f043f4b845026e341d7967302d9b5a6cdc827c3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601313 — a six-check JSON result.
Andalucía: Sevillanas (Huelva) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8891a6d8d0104cb1bc7e11297c3d0ee5dc01a4bda2c7429b33d28efe285f2b58. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601413 — a six-check JSON result.
Andalucía: El Romero (Huelva) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784e47b31bd53d6a472f8f184798191340574b4456a5758f3dedb38d5fadf496. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601414 — a six-check JSON result.
Galicia: Foliada de Allariz (Orense) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1d1485a3dd016d9d1c2db4c404caf7a00b4bc3a8cd9cf55c037280254ae6f9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601314 — a six-check JSON result.
Andalucía: Fandangos Alosneros (Huelva) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4920cc204ea8f9725ac9eab0e6543a04f8bc87f172e0af3dbf735b2fe6eea635. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601415 — a six-check JSON result.
Andalucía: Villancico (Huelva) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a210536c2a38e28946f1c9795ca8cba43bf2b7568ab34a7e206fe2601cb0aa9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601416 — a six-check JSON result.
Galicia: Foliada de Riotorto (Lugo) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47ddc8c2bd41f514dfbf182c08a492ff367e5418ebf7980045a13e49c9209ba. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601316 — a six-check JSON result.
Canarias: Folias (Gran Canaria) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9367ce883bffbd6f33e097733e9dba7b6956a20f213ac3913e0b28e74d87cd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601317 — a six-check JSON result.
Canarias: El Güeyero (Hierro) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091c59f6cc3783a0d356437e5b53674b9923095345365e7dd89ba39803062668. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601318 — a six-check JSON result.
Andalucía: Fandangos de Baile (Cádiz) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c90d39d6d07843ad5c02ad8802b3c7907e06ca72c0125c28c551a28185593e. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601418 — a six-check JSON result.
Canarias: Lo Divino (Tenerife) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc139dc7c07650541187d7956b57edd329003c57db632314545d148e00f95b391. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601319 — a six-check JSON result.
Canarias: Malagueña (Tenerife) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d385935db60ace8f9f3909b9571b2425be76b81ed4eaf8c229ca83d0d83046. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601320 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5821aaf77692846a840b2c435d35fe9e3d6974b4352e428c6c20a7fcce28ab. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601420 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6d06e47766520fa44244b09078b77a6ece9b4069d5df43636f7e9482557f30. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601422 — a six-check JSON result.
Canarias: Seguidillas (Tenerife) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c2f7d97d67e31ecbe9c903cb16bf094b118724750129a2c6e63a675cf7becf. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601322 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8dc0e5f674d7d416097a97f5e44a8598261ab9689757b81133f280e6680a4b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601424 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a924bd477634188f3a81c7583ee07fc35e6bdfe16c14a937add08fc093df10e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271601325 — a six-check JSON result.