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 0x4256cb3ceaac1a69c17d0304f0a182c1787fe21f12e5be1a0dfe4b5f8e0b8cb8. 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/301dc460-8483-4c70-91ae-939f7f901f0f.json and https://artists.proofprofile.net/proofs/artist/301dc460-8483-4c70-91ae-939f7f901f0f.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 0xd6a1144121b10e505d9ea155737ad56ed74e6666e419fd7ed52fe465188e54d3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES5028600264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a49a9e7ddbc8703c987c11d2220c4d46c0daa2cf255ce843d514295d7aa51fd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES5028600259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19148b0ca474159eb8e24f370e495f88659644346d2f3d1f1ff13583fdeea5ca. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES5028600262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27147df1c629a9dec6d4ca818b252a7d3cabe2efcfd2f7728e3f5da59d3423a4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES5028600263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94edb5f879a59ad22545b9ce9980c33a458483dc4ee7b40099e9f94540fb9771. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES5028600260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0db8841b79a3669452d5ee9e0823100351ff071cd51f746bc6a558d566e100. 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/ES5028600265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66902f7043ef409baa8c24720bb50ea46f5de6a2865a5eebc6ce8d5c76054567. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES5028600258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e00856800958db0049304a1f7f252491d11016f22d52fa40bb1161fdaba6d7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES5028700197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c8ec20a7e148811131e8ab51aa735a275954eba1b6486d7e3810f331a0f439. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES5028700194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f813bcdbb49b00e0e8d9d2f71958a175747867cb9c938bc6ebafceccb2e3674. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES5028700199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8e530209d2b1ac14d4a91d86827b6bb905d53ef306aad0240cb726e11f9385. 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/ES5022302620.
Suite Festiva de Éxitos (I): Mis Coplas / Que Vivan Las Sevillanas / Arriapitá / Coplas de Excursión / Micifuz y Robustiana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1002deab6f1ca3fe31f8bbc9aff5a33aedf59c77a05ff941a9d3300abc5e82fc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5701001272.
Suite Festiva de Éxitos (II): Dirty Press / La Prensa / Harina De Maíz / A Nuestro Aire / Vámonos Pa' Jerez
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29accd0ab6d6e07ca57a82dd7cda0ef61e0280cc2781618158ce3b8d194b03a4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES5701001273.
Suite Festiva de Éxitos (III): Adelante / El Almuerzo / El Carrusel De La Alegría / El Carnaval De Cádiz / Niña Almería
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5079d587009cac2311bd6f7dc0d95a5597f05686f0a38d80ad2520b340de66. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5701001274.
Suite Festiva de Éxitos (V): La Sevillana Encantadora / Perfiles Morenos / Pueblos Blancos / Tierra Andaluza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e21181c07d47bdec1fcf392eb6727b0558ede052b2888456faae109c2e31916. 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/ES5701001337.
Suite Íntima de Éxitos (I): El Mundo / La Otra / Quien Iba A Imaginarlo / Por Granada
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188a4321fcb19cae7da48759adb2845456f808c55957753d39dcb4758f22e02e. 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/ES5701001277.
Suite Íntima de Éxitos (II): Intro de Cantaré por Bulerías / Cantaré / Libre / Quiero Cruzar La Bahía / Sueño Surrealista Copy 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731194d47a03d265f8db3b6c9012b2908c5cd7112ce0404fd5203db338e3d391. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES5701001338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3872ca5c9c17b8ebdda3f9f7ecfc1fd67ff2149deee75e6e92634858e659dde. 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/ES5701001279.
Sevillana En La Mirada - Versión Por Sevillanas Del Tema "Se Te Nota En La Mirada"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88674a37aab145c9109b928d31a4a7505be7cfd7e5718012438966831f26d69. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5701001280.
Odore Feria - Versión Por Sevillanas Del Tema "A Bailar y A Bailar"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf78fdbe6c9406891b4c98aa6627d7ee9733c4b7878e25162ef1fc562a3dcf33. 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/ES5701001281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef95c3c32b44d93f1e1da8743a6d73d4e305517a8764f596a6f5d87e4be18ff. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES5701001282.
Aromas De Sevilla - (Del Rincón Cofrade)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d61db0957ff07d0fac4ae6540d7669286b177d909e981fd68d176c41108836. 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/ES5701001283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6c6cb10ae81c075db15e1e19ccc9696ee634d83637b923b01483077b58c17c. 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/ES6020100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9df2d37a8574010b5a1a13cdeeae7d83849164e5db33a530e3e4dc66cdb1e8. 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/ES5021200672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07437aee3c4f1f9c274db1a8f96292a508bab3c7adb480a5a0714bb1dd5baa2. 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/ES5029900147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7b90fecc5bbf57f78315f55e44f941140807238dc1f1a0feef73f54d3794e9. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/ES5117800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76e02c1ae153c7ddfc308656d979b595b92e9067b404797e8d7c53a6cded0fc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEVU51720375.
Suite Festiva de Éxitos (Single): La Creación (Vuelo de Los Juglares) / Tócala, Tócala / A Baila Y A Bailar / Sevillanas Por Un Tubo / Que No Nos Falte De Ná
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999211f8d6e944965aa7887f8452bf667e7ba2bc5ad901c52fca517566747c85. 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/ES5022100912.