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 0xc0ce527b723bfb458a81f66aff38c1c3a69784c20144f1fa704563c17eea7169. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bbdce09c-8698-45b0-bf82-5cd2b295a33b.json and https://artists.proofprofile.net/proofs/artist/bbdce09c-8698-45b0-bf82-5cd2b295a33b.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 0x82f6d1e2a1564534f891b7ceb72239da0f112b155e95e89e2aa5916e9fb61f1b. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QMPKX1457983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6351d533c82f0001575f0e3e0b9587616a9051e21b93ff70944c7ea3679e560e. 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/QMPKX1457984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd407df63a6eeee0daa3af6301f379e331e3a2ba67dadcdba93d7fb40b9239e4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMPKX1457987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6c4e38987ccfedbd288ee91774dfa1852ba85d9d30a7d48adb0048430ae6b2. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:05:29Z), 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/QMPKX1457988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46da7b4e96889af6aaa4f95712bb9eb72b0be3babcce4fd6e0fcbf964aab2ceb. 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/QMPKX1457990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8257be3fe9cc62105f5a11d155a241cf42de45bd8c8efdf5eccceff281039c79. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMPKX1457991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94742060a73c8c4cf7838d6d5ff6a0734c72f32a7348b63adcb1d0291d1b6f8a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QMPKX1457992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835b4449ecb3947d4a1d6c30ed1f955f656ef841c9743b6e49980be036431303. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCACG1576354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a1540e4d9ea3209c15047cad6a3df297dc009d6b7cf448e4b253737218858a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USEAX1401643.