Calixto Gabriel Bravo Serrano (born April 6, 1991), known professionally as La Equis (formerly Xcelencia), is a Puerto Rican songwriter, musician, and technologist born in Caguas, Puerto Rico, of Puer
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 0x1c9a789a8f1ad60d685e697cbdb3e0dd2b06e70e1158c1ca66983e3a1bf6d151. 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/d6a62bc5-2926-458b-bddf-eee6f3635993.json and https://artists.proofprofile.net/proofs/artist/d6a62bc5-2926-458b-bddf-eee6f3635993.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 0x341e07672bde629cca2b497f59dc0202379e93cf94621e1867d8eeabe629b28b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA71826460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fa68892f7a05a377708b9d0e42f3b3185503e60b04138821b2982c851642b2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA81994675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb608ed3b9bd74e5781f97626d785b387ad21099079c6fec52de8022fa5d88d54. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZES91975967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bcd938b3fe466df6447301d366fc4bf1b724a6f9378b0ecd188cdf8f17165e. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZHN31927327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47494a34d9769dce941fd8920cd1a3b007eabad82f63d13c8e388a72676d04f. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/QZHN71920130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf42404e7f2f4c876b12fd848f50e891adf8b8f3285b675f2d4c95583683504. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:54:55Z), 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/QZHNA1908443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd795a14e6de5abb64a78ab74ade28f9fab7e6a162571bb38f4ed59070178f721. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMBZ92273667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696a61ba67d933c79e87be3163a4a2756d1a6d39651ae62efac9957526153eff. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/QM4TW2390601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ad6fc5484c1dc74b714f10a01a7910dfa21593666569eb996c05a50fabf39e. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QMFME2382419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b8745608f8fe42312eff1ea03dd185e686233602c49e6f64aca1f54b4ba147. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/QZNJX2500506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246bb8846f54fceb1681418549f92e2072d9fdd05d02c14d3aedcbd21a399b0c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:49:20Z), 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/QZNJZ2518537.