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 0x729043e7514fd7072aa3e7a740209858bfb836f9af0afa9ed24d3b5313c4ed8f. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/934bae6e-ef20-48cc-bfb5-5c4f78d1bbc0.json and https://artists.proofprofile.net/proofs/artist/934bae6e-ef20-48cc-bfb5-5c4f78d1bbc0.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 0xc8943aeab64a18719851b14d828c417de653dc382a8bacd2a49a66a07322696a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SE6TI2170395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fbffc49f7a111bb7580ba711190335f0fb97ef60c691ed70f3d0d05d8571cb. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:20:40Z), 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/SE6TI2170397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6632801f2c3e568460ebec410e0a63de9675ed218217f877144fc498d4bc13. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:26:17Z), 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/SE6TI2170398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b78a45884574c7c852105bdf4de7aa342c87c39d00707108b0bb74f52c8ea3. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/SE6TI2170399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9917e117d4f4f1b792db2daa691926df1f0de641ef69c1251d6af2a27c271218. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/SE6TI2170400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3b91372e10bf9bdb4ac133ec5e161f51bb4b1a679b558c526574d450f398d5. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/SE6TI2170401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3106145b72f8258d0bf2e1aa6d6d80660ef5920c6cd9b448b0c3f2a6b0bf8c0. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/SE6TI2170402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bceb6f2aa1eb26d8e538f22b8f1c5043e8523cf69b4e67d42ce115d2d11d8d0. 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/SE6TI2170403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749708394342b7e6d4f2b1f575dd1cf7849afebb260fb4c3cf1ea3e5e43091ff. 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/SE6TI2170404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6bfe2b1202033d86401e6eb239b072788075ae37d5140b728e9d2fcc497c1e. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:44:15Z), 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/SE6TI2170405.