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 0x9fe83490a7325a689ece4bec0cd60f421b472790c7d3d26bdd91f359feda190d. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f0b20f9-0115-4528-9e23-21126c640515.json and https://artists.proofprofile.net/proofs/artist/3f0b20f9-0115-4528-9e23-21126c640515.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 0x5f8eaf83613557810fb33676e17ea99f7cdd357f6148692e35709e1d02b20f35. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:03:21Z), 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/QM7281996470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5798095210a3b71d16f72446efc18f7e3ec77bd57d63ef16656b7b1e599fe372. 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/QM7281996471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927b37c383361c1f2d68c4484cc6b3f0536b94239a23ba2f9a9e60035d872dce. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:01:04Z), 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/QM7281996475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acee5c75698e190dc305708c838bc7808b7c32509bccc1da4c7bd14e9bc9858. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QM7281996476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2da40aaa16b683571226cb63258547ea674880704a9f9e3bcac73b780b978dc. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T12:59:38Z), 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/FR96X2198776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9733ab825f867e83acf5cf609b7e057322f9953bfd6bb4f9083630bb7e9ca87b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FR96X2198780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549f82f7cc705db88e794e6ef8bdd708e7dcf7b0bd34ca02fd326845bf7c4e89. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR96X2198784.