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 0x2b42956f52f472c3c744dd4708cec0ae1997919dcc88f25aa51b4228970c8704. 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/5c8de536-6b2d-4264-86f8-010a251a2f57.json and https://artists.proofprofile.net/proofs/artist/5c8de536-6b2d-4264-86f8-010a251a2f57.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
El Ritme És Pur (feat. Toni Mejías & Zoo)
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 0x6a9117bcf509d1226c363ce18563a3ccec7a925e9e8889bd26f3fdd747ec7298. 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/TCADJ1741878.
Club Social (feat. Julio, Sen-K & Panxo De La Raíz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857227277e56f3da659088a36a75cc31e25352611644d700ab871ed28079962c. 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/TCADJ1741883.
Singing 4 the Revolution (feat. Auxili & Aspencat)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9112f34ebadef36cc4624e78a3a0f05b446a9121d88f5d6dc13dd447bbaa040d. 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/TCADJ1741885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e58e64aa407487ad1c9caf122c5fcd2e8e7ba569c71decf59d748cd1a095f6. 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/TCADJ1741886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bf852b724f5b906d398aecb4fd78ce3f6a0e312157563d45a9ad753cc1199a. 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/TCADY1801864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d685c75229c233e85c115d5fa9ad51722f69ba512b300da62222e9037721fd3. 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/TCADY1801891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6b9ec6ce493502a35572e3627a3201fecb41355c574380c48f4448e53f9b46. 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/TCADY1802020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577eb618594780f026dd27f8d4cb6cbb280faec863d68b2760262a47bff27f3d. 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/TCADY1802076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84fab806952c5863bc8c94a1f65830554ef962380d5beaa191ceaf11ce868a2. 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/TCADY1802149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb592cad76cb8bae5e14002e176f28afaccc656e7d5ff52c543e5e1327cbe7792. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHN52452824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387b6022d178ff0cdc9a2531c3c14a01f107d49e00cf3f507800aedc44150a96. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZZ762414099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b69dc3a2b87c499e906fb76fe4cf71b972e8643474c9020b2a36472951ae9d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA62517494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3185ddc5a7e64e5d48a0b9f0cc4493986fea8d74317a6f38788e97c6ff7c5998. 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/ES11D1800193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419b7544ad7a6fda636cf5cc6d3ec7cf84b8cd03f32144e61bd1bea1da66fa02. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES11D1800198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae719b6736bf5bb3e5edcafd98a8835d3784775c24f09d8a125e9c8fefde7ab. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ES71G2152656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4c8ea8408510a0b7a1421bc50a122cb84a22abac8bd46781aaf46254b3c908. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/ES71G2152660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a46fad81d6a5ab2457abaf02ecafcdcd0a862ae733102c7a0efb0028e3bc2c. 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/ES7311800097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086eb165e455de7811f1f1b380e43de28c564947db67852b7a3c75d69d41bf6e. 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/QZHN82058872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1d3a28d3b5ed6aa19105f51c45ebf64ab52a7aa3b9f8bc86dedb4459c1640d. 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/ES11D2200706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a7818406cae25d6f9df1f8aca9dab5c5ae4955b927bbd4c676b2c47db23228. 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/ES17D1800457.