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 0x284e13fb9f9131e07dff30e7ac82328cc9355c3236c46fbad80c9b92d66b0033. 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/42852d57-70cf-472f-9a7d-a9abf73a6f79.json and https://artists.proofprofile.net/proofs/artist/42852d57-70cf-472f-9a7d-a9abf73a6f79.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 0xda87ab702c16399bd79c5c120922389770ef4a4f5055605135e01904334700b0. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZZ7L2406633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b46f00ebfbc850aa93a989e451e68d88f960347179d9ef9a191c12d5bc3cf9. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QT3F42431213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f68044705123e9f49d1945aff3e73ed2fc4e0fe9e1083bcc86e5d71329f439. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QT3F42431214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387d9b5de682682b998aa21e9993136df6f70e786056e4de881c70e946ba0a7a. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QT3F42431215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d1cfb38c50ec34ee8415a37ed5aa12423f76fd9223abcb85958a4b231b0083. 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/QT3F42431218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cfef8c2e3b32705b8f2b922d5466da563045262b827e542a31f7ffea1b861c. 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/QZZ7L2409291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffcee82dcdb997d027d01ad6bc624253728a00e6a4b39ac915e749e787204b2. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:51:24Z), 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/QZK6M2576672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ca56b82a60b8f900d40f21032a5c9e5d9023b2938519b4782ad762915ab014. 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/QZWFG2506798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40eeeb883794a6e75693dab56b0a51b4eddefd16308a11190606a44c8607a344. 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/QZWFK2537556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff23567e3e09d920488ec2d3d26bb468f3de276131d345688fd642d3b91b572. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ7M2539574.