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 0xde207f1ad4ec95e85ed376f67147f341f9769179c7ee4b5f9c30163600341a7f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4668651b-582f-4362-9541-d2c6c4d667e0.json and https://artists.proofprofile.net/proofs/artist/4668651b-582f-4362-9541-d2c6c4d667e0.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 0xa42d34c89f33133b77b697f11ab7baa9348f21fa8106af9f032392612a842828. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZDA72133686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082d846b56405fb16955ff6be6fcf113ab8d692a7fcfc4229d061865d556d357. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZDA72133688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008e72b056b1f783d5c61b0d6507cd7969dc7c8f38827b87aae2bfb455ee9f3f. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/QZBRF1812394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6475d59ebc36f6bf8adfa26d2712f8d395f348d7a9de07c2e964a399aa5fe87f. 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/QZBRF1812395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d7d93beebb7998ca5255e3c361b5b3422420df5b471225488d3715a65ac767. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZBRF1812397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8891477940a4fa69bb7187b1f77f5213b51ce19000aed4853f60bcff48f3b323. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:13:53Z), 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/QZBRF1812399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6761c3fb188d8ba80ae56156e382f9ba948d75b646cc1a108840d3b5d0d489cb. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZBRF1812400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd290205beef6b67dcc6cdb8d15ef9ac4e182e7d7ca6150819663f3461a749e88. 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/QZBRF1812401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2f512dba7aa003d1a92dbbebe8fd2a96459c3bfad32961e3f159ab904a93aa. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFZ32104655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2928b75418565feece72d7072c6c19a890c1afe7e90d36c92a5b76c522c1f2. 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/QZFZ32104656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b825fa4feba80274c6b907a3d040038229b4ff0001f12570aece373b04653f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZFZ32104662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b74f647fbe3ef4f2dec161b5248d5798e479b3701959f6d8769197044996825. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZBRF1823312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea869647d048b4239c309ff33c25e18ad560f51ce5118f09b9661828a3032772. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZBRF1823319.