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 0x50de6973c16f9b6994d3dfe75dfe3ad7f30d5b342625bace0cf545e6e33aaf38. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70f54478-dc36-4462-870a-b9be17c3c9b4.json and https://artists.proofprofile.net/proofs/artist/70f54478-dc36-4462-870a-b9be17c3c9b4.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 0x2faca9882d3b7366b215c473059d3ecd2f25daed0f06f93aa8ec6750df08f36f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPFL02301380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9c24a09372ac26af0b04f5f0086f8dd87b79183308340b6270cae342500ac6. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:05:48Z), 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/JPFL02301400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6232d6d5846d2da9a857201a0aec4c3bf86e28633c7d4436d8fea254a19944ec. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:10:33Z), 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/JPFL02301390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e947faee6dc77132db1dc114ffbadaaa28e55e2d59ed4daf72397c1452ec015. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/JPFL02400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9fceb9cc6e1006cbbad26560364c88eb1eee3244cb712fa6e0411720a3f118. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/JPFL02400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ff15e2c20b9a76c454538a6d07dbe59725d034070bc7780fb104ee6bf9b9bf. 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/JPFL02400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f67c250cc188b3b9696d30bbf9519f8640b7491875b781a66cb45dd2056ce1. 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/JPFL02400500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad88cc2b999b50e9888fa0ddf72c7099dbfd3f01f008449186b61ecd67ab88f7. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:10:45Z), 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/JPFL02400510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca8bdade4e52c16da4721c8544b6b8a83ae0abba4ca087cb36bd1580e564a92. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/JPFL02400490.