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 0x66d837e17c39b2206a98221b2a900d8d55a311b1de6da6f29e4d446a80a87205. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80653810-5274-46f7-ba6f-056bc97915c4.json and https://artists.proofprofile.net/proofs/artist/80653810-5274-46f7-ba6f-056bc97915c4.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 0x135147c23c61ec7643a13df11e072d2171385336bed3e57e37a2c2f3db223fbe. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/KRA391500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf387c47e93d6049ca88f1cf57593d8e2cd14fa9df9951ac9429628e0b46f5a26. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/KRA391500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc5e63506f20ba241b7b4eeef5e0a01c811ba87c7c1e315390bd0113248769d. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/KRA391700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927ad6416d7cba11388d69d4a32371f796ce49a020eeb573b3ac9e63d6ab1eb4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:02:44Z), 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/KRA382207824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56fca17846607f611cc9d6f2df130a8b6dbec1692e1f170d4473d6d0c2e5337. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:29:56Z), 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/KSA002301891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2131447bf6f1bf8e4f5196a5af1ce9ad10e445647cb2d600b167065983aa34d2. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/KRA252501218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963ab07b6de55aee9bbbd88da0917636dabaf39d612cec536fb753e655bc13c3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/KRA382302292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bf0d16d91983f229d8ebab55f29102852f422c9ed73e0b15fa3882821dcfe8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/KRA391000213.