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 0xdc13458ba1b67f1e5525f6cff89df01895cf53f85976782cc559298be72c01ed. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1704a1c7-62be-4e5c-b2d7-cf615291db3b.json and https://artists.proofprofile.net/proofs/artist/1704a1c7-62be-4e5c-b2d7-cf615291db3b.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 0x33ee0b574aaaa747583358b44bc7e0a6d0f2242483a16c9be5ee517c00496b2f. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:59:03Z), 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/PLC062010856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad509528ec6a3aad7832c4bcdb02548834c86017da0155244d3cd72220bec6a1. 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/PLF302000882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada0716c310de583a13b7fd8ec645fc7fdf59e3b545d75ffa3085dad6c12941c. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:59:19Z), 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/PLC062533015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa883ea878a8a911cff0aa349a1e2fca411aae18fa28acf895e2159a3ea3503f8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PLC062544501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6741a98fd84de957687b13223b85af039cdeeccfc345a5cef36bd074ad6d0a5f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/PL4K02501338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cb90469b29f16e351c96d360b84c12661e649f3718193a2e276b2e19e2f59d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PLC062228713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cb90469b29f16e351c96d360b84c12661e649f3718193a2e276b2e19e2f59d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLC062228713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb266a2adea570bd89f5014034f23dced9928beb75c849bf08377dbf7ed989a75. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4DW1837053.