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 0xbe0700735ad3e3fae0b92a4bf30a82d2c06ade3b08c3287603e3066b5f302e1a. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ba22c60-3e3d-4aae-9fad-d17e14e8670e.json and https://artists.proofprofile.net/proofs/artist/5ba22c60-3e3d-4aae-9fad-d17e14e8670e.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 0xd1f96ead6addd8ca65ca9f0a714a4bde78f7777b42aef9bcce31cb8069252788. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ARFSB0800532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239ef8214f6b94c25d13f5e15b6dfb78cbc317f2e7f317cecda2affada01227e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ARFSB0800522.
Cantemos en Familia (cantemos en familia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113694092f2f97fead7c77b52566256e2c378715295f5cf4d0e12db914a73429. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:04:21Z), 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/ARFSB0800534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239ef8214f6b94c25d13f5e15b6dfb78cbc317f2e7f317cecda2affada01227e. 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/ARFSB0800522.
El Show de Carlitos (feat. Los Auténticos Decadentes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2757b0aa44dbb76796ba47e6e80af19a7d0d151546b83770a024b2dd001759. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:19:30Z), 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/ARF100200171.