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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da353d9314de687fa4127805c669052fa30efc530e4f80dc1e4050dec7b8308. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8bf073a9-6f8d-480f-87ec-617b2bfc482c.json and https://artists.proofprofile.net/proofs/artist/8bf073a9-6f8d-480f-87ec-617b2bfc482c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Boga Boga: Canción Vasca a 4 Voces Viriles - 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6158e8238b314936cc362dfa4a3e3453cd25aa837bd8f2dfb5c7fb8cf684354. 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/ES5271503601.
Gernikako Arbola: Himno Vasco - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e82103a391792213c1994917cb4a6ed8f4a524bd096b7ff4ace4c2ef5d3fdc. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ES5271503604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6867ea80b68d74e5d807adea42e69a3183ad63e8e1f46c06ae8c33931acfedf9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271503605.
Bi Euzco Abesti: Canción a 6 Voces Mixtas - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0df3644c374989d83508b8da440e83b5ab725c70c07e2e5607f2f6cd6061a51. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271503608.
Erromerian: Pasacalle de Romería a 3 Voces Mixtas y Tamboril - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eeb5cff40c16e4e76f3daa58f5f4d8b3cb2082214e16855788fc3e66c5c757c. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:47:56Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271503609.
Ama Beguira Zazu: Canción a 6 Voces Mixtas - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b66efeb2b8f9dafe7d49e14c6352a04b2ca5734eb11e78a60b49950e646069. 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/ES5271503610.
Txoriñua Nora Huat...?: Canción a 6 Voces Mixtas - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4624905d57424a2a2de3460d94b72fead240ec62ff8919f21daf2bcd47c39244. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES5271503611.
Deun Ageda: Canción a 5 Voces Mixtas - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409d79502e37f266f8021f5d2e2c776250ac53af99711c20d8801bb8cc9af307. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/ES5271503612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ce89f4d63a2c0d77a2e23a3c757454da723db241c21c2b62fc68d51921ca27. 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/ES5271503614.
Marcha de San Ignacio: Himno Vasco - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa569c22dad148b7419debef9a749e3602d8764d537b851259cadac4fca3d865e. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:06:16Z), 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/ES5271503615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199eb4d8669ed22ce54b863ebe3f9287652d5f2d3b5168d9c9511e79cc410999. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:30:50Z), 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/ES5271503616.
Maitasun Atsekabea: Canción a 6 Voces Mixtas - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1342db8957b235a66194a90c37563cdbaeb16cffff7450e8fd311131984bb0e. 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/ES5271503617.
Ator, Ator Mutil: Canción a 5 Voces Mixtas - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534a47b2a30a4b70e00d014bacd053bdf7a5232502648702b98d44163017dd6a. 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/ES5271503618.
La Chulapona (2ª Parte): Chotis (¡Ay, Madrileña Chulapa!)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cc538f04b9ac1974d799299b338750f782ac9bb9b22a2cdcfd24a0a8c3b699. 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/ES5026400171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5339e21223035d16e950cb60dd746d3ccd9fb7c23797e82b45fc20a91db5bcc. 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/ES5271107010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1758f4a801c79c40d328d796d7bf03b42011c25f26f2ca381dd313fecf636e08. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271107002.
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