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 0xafb49791200aa136c470ad2c2d196534dd2593a5f2158aa710b45c2997878f8a. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd701db8-03d2-4485-9f86-da7238a6cb8e.json and https://artists.proofprofile.net/proofs/artist/bd701db8-03d2-4485-9f86-da7238a6cb8e.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 0x51a050dc556956fa7a74edb2956884b11f9eebaa7e22adf501639815c57fca04. 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/USDHM1316997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da5507d35c72789849bb74854fde68f008c81d67e242a1e7672c46531481add. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USDHM1316998.
Algunos miran, otros hablan (feat. "Black" Rodríguez Méndez)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca8aaf5e144942184eac63ade8323ff12e2e540de50f561fe592622b1892672. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USDHM1316999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170bff88da4f44860bd96d18f3e440ce9fbdb29d3568b54c962eb7bdfce70677. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USDHM1317000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29a2c81fdec36ec779ff2d00a1ed3a96b0e98e0ea9cc640f303cfb130ae9464. 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/USDHM1317001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8029eb0219429d0d48366e336a35b576049d94e99921c106a22caca9bed7e408. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USDHM1317002.
Mi involución (feat. Hernán "Cucuza" Castiello)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccc94c8b2ceb1924d71b1265670d9f86f163d8481930464d9131018802159d2. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USDHM1317003.
Para siempre (feat. Victoria Di Raimondo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeccaf78fb8bf13b43b164c31fc00d79dbeb35e7af449ff8b31ce71878ed3f99. 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/USDHM1317004.
El tango que no silbó (feat. Miguel Suárez)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c80f8efe09ee2dac8a1e653639507fbf6b63f4b4b5b555a958b4dad7809a34. 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/USDHM1317005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb485cb4b8d1a8c60ebc4f4baaa7143d6342644388fd28a4a0b007fc789dd1ee. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/USDHM1317006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16c5c89447bf8cb29588a35af39f1c3a437ab7385bdafb83716a0dadab2f3ca. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USDHM1317008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb134c9977d63580ae6c3e1a17e881d61f26691d7d5fbb25a5081d813cc2b8ba. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USDHM1613091.
Inundación (feat. Walter "Chino" Laborde)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745adacd3c40fa84af71cf8aaae5669b8d2d0a8289c0942564905bf81812c5cd. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USDHM1613092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f419560c17a3e6da77d94175da80c49fafbd23cb77e61951f05fa050674b859. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USDHM1613094.
Aire Sin Final (feat. Hernán "Cucuza" Castiello)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0264319d500a95179b51aea4bc8091f40d7edba6d08b1cf37125bb8f99f523. 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/USDHM1613095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a7441d49cf021af0d0fbcf2c57be6408408c41b82753a9c981a031671dd321. 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/USDHM1613096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8603df4977215c05e7340d072c2df560347c5dab8fe818f18cafde7ee16c626f. 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/USDHM1613097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e144ed37b46c404af72f1d630f10bc43211eaaa09fb397b9821fb14f06fa6e. 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/USDHM1613101.
Mataderos (feat. "Black" Rodríguez Méndez)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2648c1e0f7eeb85895f99f32840612c2c582fbbd55c2b7335fbe0d8ffbe4f287. 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/USDHM1613102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1432a0daa40ce1a86184e530f6b0462c40b40e79bbf64e5a1b97c27a4d780fc9. 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/USDHM2209837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75a5d011788f61e8af2ce6ec82b4f4ca7063c4a0c8b7f68e822a428d1582497. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/USDHM2209838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570bbae1b3cf0746d7c7144004053cc49fed74a3f641e40345378a86a05c3194. 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/USDHM2209839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3c6108c0d43afa21ac52353a69abddca0c2183ee73fc3151d4426e309c2892. 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/USDHM2209840.