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 0x6b92f042c55c6b00f738c8631ae53529593709dfa04d76895d1159069e5581c2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b732643-3b0b-4f50-a2d9-556068b039a3.json and https://artists.proofprofile.net/proofs/artist/0b732643-3b0b-4f50-a2d9-556068b039a3.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 0x93e73b2dfaa2cda4b524d05cbd87e18b8f6a82462b2fc991729a2e8ea5e408b0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USE830988749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fab716df3e20a7c60f520eafcabf1542d766760055a0f51a73c08986f046bfa. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:59:41Z), 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/USE831510992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba0e33fb9efa4565b0b918bde3df4c0378d2c44a79e7c9900bfd8ab2ac015c9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USE831510996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a17d11d4add3538617c573249cf2a20ca7f14af34d5912e61d2769aa6252c7. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/USE831510998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2205c45bcd2ee20ae4d55253d40c1e034f887edacf55f1f965c07550e08dc776. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USE831510999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1990b097a40f529056aa4d4d291cbf7f7b8224ae1e56a39b22ded431f9c7d210. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USE831553416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29dea20de67787d560b3cc302059fbd2846a0088b0838a4271ddad7f3336762. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/USE831553420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db4defa0f1cc0f188d66f24d07f5aa10f4e59e94d35ba9e4d809a9a9561e271. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:06:40Z), 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/USE831560755.