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 0x381b18970aa30ad1eb14e43ef53dbc6a5316cbb0505c07ed7891bd849970c9ba. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52390ea4-5f61-45a0-a6a0-1f4b05df2c28.json and https://artists.proofprofile.net/proofs/artist/52390ea4-5f61-45a0-a6a0-1f4b05df2c28.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 0xabf841b0668a6b4cd62aa55ceeb1c688a6792d594ac7e45d5412f2180a873c18. 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/TCJPK2538534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf841b0668a6b4cd62aa55ceeb1c688a6792d594ac7e45d5412f2180a873c18. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPK2538534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f49253d77453e76ec4d6881adf3eeb4aa6512df579735b8b9bc19b28756af5f. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCJPL2569397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8c20bb277f5acf0d208fcd609f4183d0d7fd4f068a3f056ab61fe71aa05e6f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT66J2599397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b3453bd56fb888a17d832bc5a3425a2f5fec168939b95a0897f6cb4a106716. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QT66K2500765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286fa723295fba0b49b18c28229b07f5dfd35c1182f8c6e6555fcaf911085964. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:53:14Z), 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/QT66K2509026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38a995ddd105618d1c0e89b4ef74fab6438211dd838fbbb7ed9aab6efbb1def. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT66K2515503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61b205023687115654d5ebb24b81f2fd90ef74fac7fbe31e51e149d3cec1f85. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT66K2523560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f39a81a3b11b7357230c44ee07fd2e97fbd71ec69bea4d3d3de69deb8536056. 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/QT66K2534985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a377c58cba96d8b69047916d82de88f21c175ec790f05a515b3ca86738db7f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT66K2536052.