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 0xc9095d58a10d08436fb2dbbb8bb51116fbfa71075c7252688c8275ed12048813. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/449f73b1-08fd-40c0-889d-1822ff794124.json and https://artists.proofprofile.net/proofs/artist/449f73b1-08fd-40c0-889d-1822ff794124.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La Verbena de la Paloma: Coplas de Don Hilarión
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 0x935ab12e815b271070ed81e0be4e1d51dea617e95c8dd11bb3a67aa835f89323. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRZ139410310.
La Verbena de la Paloma, Act I: Chanson de Julián (Julián, Rita, Hilarión, Sebastián, Tabernero, Mozos, Portero, Portera, Chœur)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7aa1eba2ecf74f3d3a3fee33c587af22ab741dd13bf758cda0871e5975f1521. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR10S1754988.
La Verbena de la Paloma, Act I: Couplets de Don Hilarión (Hilarón)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cf8da467f53449eb5d54aa607e67d577dbf8449559bad9e8419d6bf54c9ef6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR10S1754990.
La Verbena de la Paloma, Act I: Gigolettes et Don Hilarón (Hilarón, Casta, Susana, Antonia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eca96a6b8d16323c752b12350bee6f7ed3a36c25575aa96f5b3682d3daf99db. 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/FR10S1754993.
La Verbena de la Paloma, Act I: Mazurka (Casta, Susana, Antonia, Hilarión)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ec316ce36ef3305b0a58b36b9ea069d2b80944f3d32d4f7937d251615bd26d. 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/FR10S1754994.
La Verbena de la Paloma, Act I: Rita y Julián (Rita, Julián, Guardia 1, Guardia 2, Casta, Susana, Antonia, Hilarión)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a3e117af9992c550efbeaa7825754d6375f5b59c582cad0a7d1652968b4813. 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/FR10S1754995.
La Verbena de la Paloma, Act I: Linda Susana (Hilarión, Casta, Susana, Julián, Rita)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc043133e118927be4e014246ad6e9bfe1238d473fb9bb7cb3e673c62ba4001. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/FR10S1754996.
La Verbena de la Paloma, Act I: Habanera Concertante (Julián, Susana, Rita, Hilarión, Antonia, Casta, Guardias, Tabernero, Sereno, Chœur)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b00d830f6ded3d22da89c1a687a132dcf3b9e3d81e093962f57da98d38ece0b. 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/FR10S1754997.
La Verbena de la Paloma, Act I: Parlato et scène (Hilarión, Sebastián, Julián, Rita, Tabernero, Mozo 1, Mozo 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d242212d8ed8923d3f74c2770366dba88d6c8a44f23749b865dd5e3a2fd3319. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:45:08Z), 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/FR10S1754987.
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
La Verbena de la Paloma: Habanera Concertante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b8e40603d07a4eff75d9c78d9020d50a7cee60d30ba78d3932884dc9134dfb. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRZ139410380.