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 0x2b12db6d9205788957323881dbae16737ce05958c7bc875f441de96232042323. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41cc02f6-a634-446d-b387-9171155d7e4f.json and https://artists.proofprofile.net/proofs/artist/41cc02f6-a634-446d-b387-9171155d7e4f.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 0xf65b8f3f847b3a0564692c90d12b6f27ff3129fe0aeacbaaf35422fe198c3fb2. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:05:12Z), 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/PLB381500229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8976d85665a68686870d4ce06bade9923b6a1096ad94b1a41801a82c6ebb34. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/PLB381500232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b333e7cc74b0cb7cfc34009f1de9eec5c2706f15af863a36cca8315f6d736ca. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/PLB381700823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b41e7059a6e10eb8fccb15ccaf4ed0949ccb9f18a4c8ecee72a1524bed01ca. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:34:18Z), 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/PL21E1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc9432e643a9375b4f832bdbd4f50eb5ddd6e7850c0dc8505c8037e6cc6e47a. 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/PL21E1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc495dfafca1606e59cfe4bb9a991963518aa0af38854e75767e70aca51a8985. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/PL78G2401406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de9181039c2c729a23331cba11a57d9fbb1217404cc902cbc6df7acf35d6b7d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:10:00Z), 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/PL78G2401403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5b9f79dca615e291d86ec058f8db6ced8a21dcd4772ee8916f5f90f7212105. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:01:46Z), 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/PL78G2401404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c7c6a56a3f4215b3d17a8f393c44534b1f0b1f2a0fe3068e736c1d1d738f43. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/PL78G2401405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfae2f952278fd791cf16a0a7c6ae5ef9d04103121eadb0508d0f121591861ad. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/PL78G2401408.