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 0x938ad17072933266c236cbf7ebb27e724f1f50f724c24b71215365527d476f0c. 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/b48c52fc-31ad-4576-9fdc-607cf839e2a0.json and https://artists.proofprofile.net/proofs/artist/b48c52fc-31ad-4576-9fdc-607cf839e2a0.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 0xe4620b00f09aaf196afe871ae813c52e546d17c4eb002bdbeee62436ec78019e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US3DF2410999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70e936e9c1e29e67e02e060a86140427f8d0bf18aa3f3a7c0efa23e1fa94593. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USE7D1300145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9540a24f29045ac69c5a6b63e65ea2ab8e82fab9179102548269ab647d909bf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USE7D1300040.
Enemigos de Sangre (El Chaka De La Sierra)
DEL Records Presenta: Enfermedad Masiva, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79bfab3470b2b9d0140f4eaecb22a7bcbaa831b0775e84885272df8628ca7c7. 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/USE7D1100214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9540a24f29045ac69c5a6b63e65ea2ab8e82fab9179102548269ab647d909bf. 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/USE7D1300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5031f5317b76819c3f3cbf320deb75fb0da2a0e07626dc6d221f4badb9a911df. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USE7D1100211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1eadea2e5f2a13729c2f88b33f41a19bf103c931c1097397587bfcf31e5d767. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZVR82200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8954193cd01cd3567f4403d4d3cd35f28febfbd019d391e44c4b7b705c83e2a9. 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/USE7D1500075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b410a595e7812497648da5f8486e1c0da4e93388039deb883f3c3cf2bf7830. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3DF2281621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2833b0037dcefc486a544dd7ea9c3e7c0b56b242757fbf551e33c6d8fa3143. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUM71822174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fcd1ac67b80704b4e5d47081c9d98dfbc3160679bbc8a434671c4e75eb9e6e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMANG2200011.
Jorge Santacruz Y Su Grupo Quinto Elemento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ed1d4b1abd209939e62c5c049be86e1d534de58101ab110ad89777f537e579. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US3DF1993461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccc50507d5b7e7c689d666b895175f9d8442206a00bfc019ab7bd8cb790257a. 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/USA2P2307665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ab4ee1042d9a76768dab1d72003a36192705340764630722dbca3425c9a799. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USE7D1600126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d67bffd36792a996c5c5ce037de9240f2f47b84d08fc9416eef4833eb63786. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USE7D1600131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6ac88f4b43e34bb37e1eca7963ee3c239a97140b62e3b7608a3ea988a7a7ec. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USE7D1400143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39915a5739c4cc896cac91338befd0d14aea96ae748c04b30e1f01ab5767db88. 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/USE7D1400144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1ab9e08a1de3fd891aa86c2076773f4f567bd722cebafe4c5e268752db4587. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USE7D1400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8133dfdac146d97af312a6b4a7d7d8c0d77a097fd3cf0bba8f262e5006261466. 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/USE7D1400146.