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 0x1efac6972a77e3dfc8f858b82c9abc9f99aec09c2aa6225bbc6364583bd8d563. 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/01dfc1ec-5c2b-49b9-99ec-b087d0775dd1.json and https://artists.proofprofile.net/proofs/artist/01dfc1ec-5c2b-49b9-99ec-b087d0775dd1.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 0x714d9830dd8fa7dfbaa33f8d1342622c3d9090e15ffaae46045da09957a9f1dc. 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/USHM21833191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71ae7e4d55cb6e6868efeb91c248aec2cf80cc53f35b2764e74bbad39cd7177. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USX9P2024512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4706cb1a0c9da230059ba4b72c8dadecdc39157d40d501ae81632f8b3184d9d6. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USX9P2437672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05b81a1a59eb7b155454b7c2bbc1590feb265f43345df565ae8312fc6db5db9. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:47:02Z), 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/USX9P2437673.
The Church of Jesus (La Iglesia de Cristo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5515262ba6e9d0155ce7b6341aaa980e7431eea32416cb20cf3c81356967884c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USX9P2437674.
La Iglesia de Cristo (Estudio Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7f1da5c4b83bac9e306802825ef0ef6689fd29c70b3670f413344a5e18d603. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/USX9P2437675.
La Iglesia de Cristo (Acústica Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6bc70b084644344154b01fba141b5b373b8fee4981311d6e80ce934515d8f5. 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/USX9P2437676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2d496e7750be62829fe809917eed3bd63f1253fb6ee9c58aeaca14485ea5a0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMER2126430.