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 0xd9eb76d91ae889b54f6c8b781f413a0dfdfa5e0ff977115d5249cb8097396ce5. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab35f1fb-f3e5-48f4-be1a-0b5040094cfa.json and https://artists.proofprofile.net/proofs/artist/ab35f1fb-f3e5-48f4-be1a-0b5040094cfa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Música española en castañuelas (con José Luis Rodrigo)
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 0xf60e7a1f65d36506aa63bd96ea73c9e7efdef9e2c4db70365e52bcb5a23e2574. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES5151701675.
El Sombrero de Tres Picos: Danza del molinero
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925ffbace40a2422fdcf71474f5d67651a150be3e9dad288b5b704ed43bccd97. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES5151701676.
Danza española: X. Danza Triste - Melancólica
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075610a08d8dce6995426a5860e3d3c3e42e9cb4ae237192add9717bdc5d3c07. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES5151701677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ad5dc53b51f613db033ece47002ad9c750c9877d6127b92580bc69b9048fa8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES5151701680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5d44b4b22b928c259cffbf509053ff8b821aa9c51d71d59fef636e22154e35. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES5151701685.
Sonatina for Guitar in A Major: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3e1d0333ffaa82d8d848426795aa551e33579f669feaa017bb54b524b163d0. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES5151701679.
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 0xead54459a6708fd527e431eb30b8599c11380ac14181b999641ec43d0d1c62a9. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ES5151701681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9f1219900339747eeb0ffcc3b714369c12db5eda6f4e6281f75afcf2c96cc4. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES5151701682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565db5d7fb232391a30c131bd8bbdc5952ad462ac3d79869b4e166858c9bc4f7. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ES5151701684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386f3a905754131f8d134b1f763920718637163846e1ef96558081135171e50b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ES5151701688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258db0edb00ce46c10bbb09f69a97a49277c2429576b9c4d5a530826d4dd6a05. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/ES5151701692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c2d75df4f9690eb719567b15f3a7e972a20e42462388450410c6fb64671833. 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/ES5151701695.
Homenaje a los grandes del baile (Remasterizado 2016)
Lucero Tena y la música popular en los tiempos de Goya
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89db7a2e472be39be0967452793d00c73b91824fe832ddf3c0245d5f70488d24. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/ES5151602363.
La Boda de Luis Alonso, pour castagnettes et orchestre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecae5cad3fe94cf98b663b4b5668a491491a6ab6148d6cad6b598e4bdef9fc6. 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/FRU621323649.
Carmen, WD31, Act I - Act IV: Overture - Marche - En Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96ad360c83981047abb2469351f2d2298bed82415ce5cf795c33d6875dbceaf. 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/USL4R2033006.