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 0x38a86461f920fb4f719900b244c653fbec9d711370bf281e6bf73b10e4c9fac7. Chain 2 (Bitcoin): anchored in block 953889 (2026-06-16T04:57:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e82b543-63a9-4bf0-aba8-30d908f15853.json and https://artists.proofprofile.net/proofs/artist/0e82b543-63a9-4bf0-aba8-30d908f15853.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
El Barberillo de Lavapies, Act II: Una mujer que quiere (Paloma, Lamparilla,)
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 0x71f6e6c72d8abe0483fb9dfa886eb98e4b9265258a7e7db4ba467a4c6c0adce1. 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/FR10S1726573.
El Barberillo de Lavapies, Act II: Seguedillas manchegas (Lamparilla, lope y Mancebos, Guardias)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2bd62b1f8cc92ff7fd1e1d3aa61daa185dc5bbd2f2fe058e37c0088b822c80. 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/FR10S1726574.
El Barberillo de Lavapies, Act III: Instrumental (Paloma, Marquesita, Lamparilla,)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7a3db5418b85b9afbdcde2737bbdde2017e70e1c0e3ca5928ebed020c62e5d. 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/FR10S1726577.
El Barberillo de Lavapies, Act III: La Calesera de Lavapiés (Lamparilla, Don Luis, Marquesita, Paloma,)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca7325d10bb0c38b45b503e37d617acdcff2cf2af5f68614c739569eab01861. 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/FR10S1726579.
El Barberillo de Lavapies: Seguidillas Manchegas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1391f8705ab96a6b92dc450bd69f17c8a34b0652e205d6a9f5679c32c5107939. 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/FRZ139410920.
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
El Barberillo de Lavapies, Act I: Los Señores Madrileños (Majas, Mayos, Estudiantes, Vendedora, Lamparilla)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0cfa8baab84f1a539b736f8ed72b43ee556d60d7c36d988215ff371efdc268. 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/FR10S1726566.
El Barberillo de Lavapies, Act I: Calle de la Paloma (Paloma, Lamparilla, Estudiantes, Majos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240e49a0e2c21077349b83afff3fff4a61069f534b26a826f79558c0fa665a34. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FR10S1726567.
El Barberillo de Lavapies, Act I: Lamparilla (Paloma, Lamparilla, Marquesita, Don Luis, Don Pedro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6eb275c2304c89f99829048fee1c66de408517c60702c5cc11a53a4be0ed89. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FR10S1726569.
El Barberillo de Lavapies, Act I: Ya los estudiantes (Estudiantes, Chœur, Don Luis, Don Pedro, Guardias, Marquesita, Lamparilla)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083a344e9ecf02f24d4a7649b7343585319347087285ea772dc5a1a0fd1d5e8c. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FR10S1726570.
El Barberillo de Lavapies, Act II: Enscena y relato de Lamparilla (Guardias, Mancebos y Parroquianos, Lamparilla)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9749586b25062a532e136d1690d3cfc8cdd79df5c4147d0eecd71a186ec22c96. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FR10S1726571.
El Barberillo de Lavapies, Act II: La puerta de esta casa (Don Pedro, Don Luis, Lamparilla, Paloma, Guardias, Marquesita, Majos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9ef1a24fbdfb3777baacb9e54eaac88e616d035d5802ec80a9943e99f9f622. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/FR10S1726575.