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 0x122e04d60c43ce7405d2a4075debf8c002e039e4ba539e8f06d94cf2cc405b86. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1352f445-bea7-4773-a2d3-86e3c3269536.json and https://artists.proofprofile.net/proofs/artist/1352f445-bea7-4773-a2d3-86e3c3269536.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
IV. El Fin Del Al-Andalus: Recitado: texte en arabe de Ibn Zamrak
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 0x9165582c9a9f1d86c41caa6e2f8499cc97fc86cc8cd73e6cd74eb7a1716bd6e0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CH4210600098.
V. La Diaspora Sefardi, 1492 (31 de marzo) Expulsión de los Judíos no convertidos: Oracion en arameo "Ha lahma ‘anya"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1d6cd2c60526ae6a2039c8052384e7e8930229fdf72acd913648f23124ae75. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CH4210600108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e2e1f69181107c9ea2b02a9a9172f99b75bdca33fd51b3f6ee363a663005e8. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/CH4211800139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d5f80986959ecd9ed0596212af5714c5c443140fbe546e47b6a9199d32813e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CH4211800141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a574d664e460157b1df7fc3bdd270168099dbfbfa6bda0386ebd43c633d87d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CH4211800142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d06c769e7b245ff0f3d783b55c9b80decc34d60003f05777887a0203ccea2ae. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/CH4211800148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb0d6a388f3ff5575d241cc79f4181a161a9202a774280cdac3524fcb2090bb. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CH4211800153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e097a107ddd682c16b5d2ae7c9b40ae5679a7852618c4580e3286d114720d5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH4211800157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6161d9f303408c75f533e6307c9f95445a2b180a0b7f3f06ec648dabf5aa012. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CH4211800159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77973eff56c91093c00da1a1c02c216fcded377a2b26c5c48e0bef936c9193b0. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/CH4211800161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043ce7bdae93dc0f18193163cc41b79a999c26a9f6e32b23f593ba53ac19dfb5. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/CH4211800165.
Fragmento de la Carta sobre la conversión forzosa Iggeret ha-Shemad, cap. IV [Texto recitado] - Las Estrellas de los cielos (Instrumental) - Anónimo sefardí
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fb09cde5583044bf8105e82aed7433d3c365eea73b30166b820aa3e6c4336f. 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/QMFME1536758.
Poema en piedra de la Alhambra de Granada. Texto en árabe de Ibn Zamrak [Texto recitado] - Taqsim (improvisación instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acb412c49bf20ed1673c42320f6c0dcdfc88a7b5d1f707bc4c08caa719833a6. 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/QMFME1536763.
Diario de abordo de Cristóbal Colón, Noche del 11 al 12 octubre 1492 [Texto recitado]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a18c446abd429d049309e30c7a2cb51c692a58b07539d77e9bf1dd8fa255c75. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMFME1536771.
Crónica de los Reyes de Castilla, cap. CXCVI [Texto recitado]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4e8669baf4d94cb169a75f00c9b97fa226109c9272444ed0a1f52df7f0028c. 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/QMFME1536773.