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 0x58b55f55d8d3d65e6b14585c472fddfadb15ca831bda64fcaa41085c53cc7e3f. 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/71f6faba-cfe2-4e80-9de1-2e3016bb120a.json and https://artists.proofprofile.net/proofs/artist/71f6faba-cfe2-4e80-9de1-2e3016bb120a.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 0x0931252822ba870bfdde716f7254da73810525b2b39cbd72b037603e19d07c0b. 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/US7VG2247663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c011a177d52c2d5aec2c2032973e3b60e373ac9bc21fe319d9e0a6097bf231. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/US7VG2247665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05973148134102a69e2e331789766e18e64ac34de0074712dbebd6094d524450. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/US7VG2247669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880befa60875e0431ef88230b9de400d051b64e436b10b7fe3d7e96ddc069124. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZMER2125750.
Buscando un Cariño / Lagrimas / Pasito Tun Tun (Mix Buscando un Cariño)
Buscando un Cariño / Lagrimas / Pasito Tun Tun - Mix Buscando un Cariño
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdd9753455272e3d75d00fa66433c549f0feac9a7aa49e74425d16df9fb76d8. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/US7VG2287815.
Buscando un Cariño / Lagrimas / Pasito Tun Tun
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2105b0d599f2db5bd8c1e36e34c249c5c81b94a37d5f2d9c645e932ac8aa7fce. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZPLS2198228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa15cbbfa93f201c85dae5fdee1f6c5573d2d6ab1d3259b60f0288a6c2b7046c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWW2144798.
Juyayay / Wiskisito / Bailalo (Mix Ecuador 01)
Juyayay / Wiskisito / Bailalo - Mix Ecuador 01
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35aeb95fbb4ace8000399b8fff93205e8c40a2dcb1304f33625fc11d8cc41f3e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/QZGLS2290374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba5aa383f72099932b17495b9e2fa36dac21dc72b2c2a24aa83400532ddadcf. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZMZ92299664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1165477a89203aeed9e54ce40a0fd74b656684514c12c02a19ef3122e5bcf1. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZNJV2205885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9490e3902b89d5ff55100280fc13a07b9c4b9f0bff50dac7ba58af54cc7655. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZNJV2205896.
Cerveza Negra / Ahora Soy Feliz / Te Necesito (Mix Ecuador 02)
Cerveza Negra / Ahora Soy Feliz / Te Necesito - Mix Ecuador 02
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e77415d3d177c46760befdaf73c85f5369b216496027879a6a2a48a8ee60c4. 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/QZW9M2346435.