José Capmany (15 July 1961 – 13 October 2001) was a Costa Rican songwriter and guitarist. Along with Enrique Ramírez, he was a founder of the band Café con Leche, a rock band in Costa Rica in the lat
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 0xcfa814e9c11f2c5e1bcd02b3976004df8ae020d9f331f660e815d81fa1d23bf5. 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/3db3cbec-18d9-4704-97da-5a3cb3a5e5ea.json and https://artists.proofprofile.net/proofs/artist/3db3cbec-18d9-4704-97da-5a3cb3a5e5ea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x7925128afdab828bd579c007ce2a5b99bd362759b61eb3f341faf259f37ccc64. 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/USLZJ2402571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec2578be5efc1e584f37145e7829a20db62f4fbda7eb07db8c42a8e2ad774c9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTRX2451924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b27db4450ef170113a39cb220758bb628eb7e6ead5ed606daec4f83457bdc5a. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZTRX2452959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa382303d7fdb0d96f0d4a3898952fd4aabdcd46efe9d696e549c81a1fcfd3bb8. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZTRX2453689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6977d1a51a9481eb686aab6a3731ce7b040747d93c94b73702c79bc36bca8221. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZZ8A2430710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4624b9c0826624096513575e6894b507fd104b7fd32b13b309520605b44ec3dc. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZZ8A2430756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4dd9a314f8dbb18d17f43fe362c16efcdcfe58ac846122c2060f2a65219c94. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZZ8A2430758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f51d25f665926d8371e6c5658fde01be416e4c677a1a4a601c8d1727dac2fad. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZZ8A2430768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c703923ef2d56f14a9e4d144dea8ee3b29b671d6fd2c3be5766d2c14c9a206b. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZZ8A2430773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635dce2209a74f43522a7d85012fffa8431a5890c2bfdebc58bd4ccd6e71c5df. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ8A2430794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8027a4bcc46e1dcf2087eae3fb4f37806ad10e4eb054f37e89615969d25f9138. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZZ8A2430803.