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 0x0d9d29176c707c9e7bf20dc15a03746293c2ae6e9daea72bc3163d6178092238. 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/44e0b156-5c24-48d5-921c-6d641253ad27.json and https://artists.proofprofile.net/proofs/artist/44e0b156-5c24-48d5-921c-6d641253ad27.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Recital Folklórico - Acompañado por la Orquesta de Cuerdas de Enrique Lynch
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 0xaef313c790b118c64437b86b9a128b246288b9a3542cc0f2a3ccf21aa214c509. 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/QZHZ32113784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8220f4dff2b5620038975feada296732110c5594baee150337f455cb9e33cc84. 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/QZHZ32113788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c972451a57dccb4528a230d2e73607a346702412a9ebfe970fa913e9592e468. 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/QZHZ32104103.
La Primera Guitarra Andina del Perú, Vol. 1
La Primera Guitarra Andina del Perú, Vol. 1 (Patrimonio Cultural de la Patria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c663fd7baf6e453e6c5d2965e78c5d7f45cf8e959d55acac77d6ccd1872179. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/USRAR1001131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317d817ecff38ff762a3a09d67d7393889e1b925f4ca5a375bdda40ac8e5de1e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PEMG99802008.
La Primera Guitarra Andina del Perú, Vol. 2 (Patrimonio Cultural de la Patria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa98f8599ae9bb95526d7cccc58635654530352b14cb670e6b6bb8cfa45deb2e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PEMG91330001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6b169b37ebf0d1523a3a63cab99a87a7e2c8ea9a63a5d027c74db098c317c1. 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/PEMG90601005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb766e39c196e83c3225bb94291708a6559ac688d5e0205c1d46fb848232b1f9b. Chain 2 (Bitcoin): anchored in block 957711 (2026-07-12T13:56:57Z), 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/PEMG91330002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd161cb671039adec23679f1a458a93d17ac70ab3749ea1fa5c84d3a992388a4f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PEMG91330005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb8fbeeb9dbca4a8ea84552ba438a53dfbd1fe4b5a03d2fdec5f9b8167b9e2f. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/PEMG91330006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcedad0501dea55ad4e10c432bff4fd2d1ff0cf326e044ce46ac8de28111a17. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PEMG91330007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6797bb83dc340b64385628163df57e96713c84fbc44834df5268cf3a3e3076. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/PEMG91330008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38be85bdbf55c9bf7e3f52435436e2b442a2ebf4dc45ae9381b2639374a2c76a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PEMG99802014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad84e29878918898fc1d8b289fe953eeccedabefa773bd0b2bb8a4f6fbf15ff6. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:38:24Z), 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/PEMG91330010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a7cb9ebcd0cb9761eec2f9c3e62fd0f0a6c40cf0d3a23be506756944367d2d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:47:14Z), 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/PEMG91330011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dbfd61f336208a4b037f5fc4ca1d93bb9473beafe8dd60317500c2369b9336. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHZ32113689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380a9b6c146c33cd2c3ad91d9178cacf0a60ac04b8589e01efc691ff2e0d49e5. 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/QZHZ32106068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6769a3903f2fcd73890c656046a255ba2a38b1dcd31d93433ffbfcb8d23e003. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:38:23Z), 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/QZHZ32113686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e6c1814099e3bb70267b758b9eb2f856ade6557cea5d395aea90c09ecb5642. 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/QZHZ32106717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e2fe694e2cc56978150052c6c021354972fe4355dd903ee5638a3824a3948c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZ32113948.
Concierto de Guitarra - 60 Años de Trayectoria Artística
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d23751c8165db785cebd2b64f55e2a3d97a2a777acb013f2c4af34ef198f0c3. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:34:20Z), 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/QZHZ32113981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2ae24761563d0446ecb7c0b0b6a7f766ef33a1208033fa1b0b25c648f5f1ba. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZ32113988.
Raúl García Zárate, In Memoriam (1932 - 2017)
La Primera Guitarra Andina del Perú, Vol. 2