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 0x685c564c5f855dc87b9bf448d1f61e12c919710de02a662d618f186131738a54. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/506f0532-b9cf-420d-b24c-b66d6db4c3bc.json and https://artists.proofprofile.net/proofs/artist/506f0532-b9cf-420d-b24c-b66d6db4c3bc.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 0x20397d0ac2a6163d3d04cc2692f60711553bd2f6be2472549e0bfe486dc5f098. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:57:18Z), 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/QZTAZ2346629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafd731f662a4f2d4d9b8665d03ea6157473d0f15629dbdd6fec3a7addd3b14d. 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/QZMEN2467753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc09a32d66ee00569224e9c72382637a062cdc7f16f7cb62b78c627eb4d4c6f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHNA2510728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd287d357a52139e3d98fe47d4aa8968282cd56bbc471b67dda1960fd9f9fd41c. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:18:16Z), 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/QZNJV2510221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc09a32d66ee00569224e9c72382637a062cdc7f16f7cb62b78c627eb4d4c6f. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZHNA2510728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c90cc11def23ccc199fec63477f19edd0cba9dee87cf0da946c440daf6ae26d. 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/QZNJV2510222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542163478c96bb4938b7294b1eed77a01b0b99e4a98402c1b9db245f1114b411. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNJV2510223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884f35377dea08d16507c598e97afea153b8f3fc6cd8e2f3625381d4d164b501. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNJV2510224.