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 0x580f40f54868ab4ec9ad3e0dd8b5f50ee99a35ab899c6183d94765f48d111acf. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8050a0aa-b1ed-4896-8ccd-5c6d4ef11d76.json and https://artists.proofprofile.net/proofs/artist/8050a0aa-b1ed-4896-8ccd-5c6d4ef11d76.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 0xba3ccae79e76aeea142df1e7161e58a56dd3b3f7755937e20d9c1c0cdac0c1da. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNJY2410093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0a4fc9b34660c4d5cd9475c1548f9728011d9a43d22e768c1adc8a7377cff6. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZNJY2480039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47d44def4e920e2c5d797b001a37fffb06ae3bbcad3e712fd0cc85f6ec01af1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWZ2509592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc031cebde6f63c26702bbcd0cd50b3f49c6e62edc7cb76efa271ca621f343ddd. 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/QZPLS2570047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6630568110e13e13247970f82963cc6247c2e81640fdba3e6b63e6d5369a24c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:50:43Z), 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/QZPLS2570049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b8a5fa74d529882a22b407743e0a701060c02111d000598da6d1326b1455c1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTAW2581766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf818b26fc4d5dc4dce0c3c3a47352f6068c438b8bc4fc3ff658cb815054add. 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/QZTB22554554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b585cab3470cddbd6fa5ceaf85298de9dc9cf5b49125922620dea3c27737242. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTBC2527031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad2269cf2ad27bb299763a218aa52fc03d6ff0811dea557c57e782bbe2a8ee6. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZTBE2572933.