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 0xb49895f384af24f222be202c71780a1920bf927776e28fdddc7ace96ac43b87f. 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/782d50f1-e40a-47ed-971f-989f13534ac2.json and https://artists.proofprofile.net/proofs/artist/782d50f1-e40a-47ed-971f-989f13534ac2.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 0xa71da3296ce9d63c999253eaa1c1d9047cc7ec06caf80628f1875bdf8e0b41d1. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/TCACR1670224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66f1af3d5dca70142063d9a957b8246e4f6ff2452fc9b6c2e89f6a9320c249a. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCACR1662325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63b0e1655737e6b5da1284a6e47b18b4aeac57ea497b6f2cae6b5e0b645026d. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/TCACS1637544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75377927bfa945cebfd3a3130ad36d27a7b970e7f16011f62159725aa6a305a9. 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/FR59R1738464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14205041b0d3ba3aaaefb1e8234d4a344f5cd3f20c84be168a55904827e1da8. 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/FR59R1813183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0cb928b8418476fd30403106e2d0411428ddbd9106dcd82e2fc0149a572360. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FR59R1813180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c2667170ef153377d3ece67e7ae9a4d0d17880897028206cfee72ba108c8ba. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR96X1864720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e14e70e721ed661a96b1f5de976399ecfd9819ad9c7c866db36fed3d038928f. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/FR10S1987617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e14e70e721ed661a96b1f5de976399ecfd9819ad9c7c866db36fed3d038928f. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/FR10S1987617.
Fanko & Friends: Aquí Hay Amor (En Vivo)
Fanko & Friends: Bastón / Changuito Reggae / Ámbar (En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bbb51fc3499f2f2011ba557108473838bd5368072bddcf7e30a2885d06a60e. 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/QZHZ41937779.
Fanko & Friends: Casa Mexicana (En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4262af32309982bba75c24504f1613f26c9c7964f6ff84aa0e6516b0551931. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USCGH2200660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b967644e6f78bed837b90f7f1927cad9c0d80c98725e4f325809cf564a9948. 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/ARIXB2311053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8088a892ea9d326a6b52e1047e8f455ed0512b2313961a747e8a4fd11bced875. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZNJX2332696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23acc8c6c3bc6f2883d0b09794c61c43470469358043f191933f1f728e953578. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZHZ32134515.