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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187e21ad4c0c8f5285be45d91780db0a481af0091cf6614c8a09a2609acb4cf2. 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/318ae912-1bf7-4d19-b3af-c1c660a0bfd7.json and https://artists.proofprofile.net/proofs/artist/318ae912-1bf7-4d19-b3af-c1c660a0bfd7.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0319bbf5eb8d9b7f7c2e54952afda6991ab960f68d23b55bc0694f80b8883f8e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWT2213716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4aaf797034edd15834564b6b7be8e9de670505e6bdd7f20792cecadfd075689. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWU2213786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b41d39f98b0bc36650f443a10bcc06914b0d918971bb6330d555bffe64ad30. 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/QZTB72330982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62734689963a76bcdfd8ddb164cf7335b9c6d71d7152dd66304762c48135ac91. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:00:37Z), 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/QZTB72329362.
Abrazame En Vivo (Sonido Yemaya) [En vivo]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45a9cd4992853f4f0d4b6b9ff52c49f63709751c91d69ff54d35d29b4049959. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTB72332595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a9befdd760eca1fd7101d542f750e32c2f6a561290444990c2ef83262c7721. 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/QZWFL2338346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192d4ee8bd90bcd9d00f3dfcc451266ee2aeb539faf17106c3db69700c10dd3e. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:07:16Z), 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/QZFZ62486402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa997596bb1c4b614957a2247ff757944f49197c4d0071c90acb2f6a084608fb7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ72439278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06da09c60aff7bc2a9278cb7b43ce3e079aea540e74e7ba033ac2e39b91f2ed2. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZHN52407772.
Sonido Constelacion82 (La Cumbia Zapoteca)
Sonido Constelacion82 (Al Diablo Con Tu Amor) [Radio Edit]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04973b793cc6f98d9bded4895f898279b0fd642db35e6e0a2826900e0c4d95b. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZK6H2412599.
Sonido La Sombra (La Cumbia De Los Pjaritos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5e926d2a61999ba2c4e231fff086a857bcee320ad8e272443a85300c2e4fb7. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:45:04Z), 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/QZMEN2472958.