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 0xca4b1a619beefe6ec55878dd0cdab090cf846fdf14931fef16c80534c88df740. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07a9d6c4-8814-4506-aae0-c28f09261f4b.json and https://artists.proofprofile.net/proofs/artist/07a9d6c4-8814-4506-aae0-c28f09261f4b.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 0xc37732ecc3b7448e2170511411ea1dc0b3a8340121bd6ec3bf7b366268b56c12. 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/TCJPV2381680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e36bbe4263f9cc74e1871d825bcf528db881e8c3385608bc2fe8a809784d156. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCJPV2381980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eadac5139fa2c02e46d271be4571d56a950bc65202f22ee183743683399702c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:45:00Z), 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/TCJPV2381818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4219672dca1bfa2cbd9fc13a39c53fac5676701663d7692bfdbf3b2a2ab268af. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCJPV2381906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04eab55923e294f6179d89bda722489da919f36f7c905da824b6e0decde39e5. 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/TCJPV2381875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b45d7a85b1ab5bb49dce02c40b99b3426d47d14e448f5861a9914c01700ed1. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:11:58Z), 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/TCJPV2381639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963cbe965bf2fd6f1902c1bfe342b98fc4014a6fb967f328559bd6d60372f39c. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/TCJPV2381867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88b87b99e5ac687a6c93f1f1eab650859c7c3fffdab297e6517e66860585b10. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCJPV2381678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d44adf6fd433e781320c8c6a31783f0845aa51711a7541117c51acfc56461ff. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:31:51Z), 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/TCJPV2381572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e62b6d532bfdd3e260aec82ec7da2921f717fed9054682fc848a664d56075bf. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:51:27Z), 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/TCJPV2381613.