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 0x2b6eab46f713fa7154bf5bccdbda1ff93968da6bfae8843a2926ff1d3f2ae43f. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc18e548-7680-484b-9957-884b2e1d5b05.json and https://artists.proofprofile.net/proofs/artist/cc18e548-7680-484b-9957-884b2e1d5b05.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 0x31090a928fea2b0c2887ef4d14006a09c26e918bf9f6373526e734ac927619d1. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:33:47Z), 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/QT3FD2529452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b15d6f61b970f979fdc00c63d821c8634083d8dc4aa320bf11f556fb1afa5b0. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:39:43Z), 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/QT3FD2525816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb365bcf8e56489641b4ca56b4e8adaf6679eb6053964519c9acce615676341. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QT3FF2510850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6945ca22b975dc81c43e455d058bb4b5a33d7f2c52a5eb8ee8468fcb38a193f. 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/QT3FF2510809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ed5cecea6ccbdbffe4f159a0eb1ea1b7e07623a772986386c90b31e0434582. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:05:32Z), 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/QT3FF2511016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a36ae44136a4df3b24a38ad8b4ab2c805cb98ee0d8102956d8645b427b7a97. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T16:00:12Z), 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/QT3FF2510844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea1bfd94f374e0a62c841d1af6e189b0232703c753d6fa836588818e3e5b810. 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/QT3FF2510806.