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 0x8b7dc93110a95041308e0b18a8e2180a6e917239e3081c62ede891a1183200c5. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da9d2d8a-981c-45a8-ab34-cb843529a5f9.json and https://artists.proofprofile.net/proofs/artist/da9d2d8a-981c-45a8-ab34-cb843529a5f9.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 0x4cad78bbd7b7c8281f79859c27922cd4c897bb3b9bb9e38c1462e80c8562020e. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USLZJ2185187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f379c323338805a0b973491541b6a6b96f52d4852c66820b9b43bcb79745e3b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZ5FN2271900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ed2601d03e65eb39cd0a1bb344b3e84cda3d5c2ae17a744455247d5fe3f65c. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T23:01:31Z), 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/QZTRX2241980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f2b0b9f2ddd32671f1aef08e601da1b0655d8622eafd418564ae381fcd51b2. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:46:33Z), 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/GBLV62217727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b84ecfbaee3f77b9d9dbeb55f46d02c46d125f55dcef6e4d1ff213b41fe587. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USLZJ2398160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87b65496f5cfca95973dc2419d920ab9bf2f7becd1e505f0b5136a45f003e12. 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/USLZJ2466799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ec8ee36d3cd11e573b6f576f887c2e4af4d0ddb4500b68500d65bbc299da3a. 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/USLZJ2584628.