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 0x08cf0b2b565c2c77a9e63a9578a4c038479c54c86368755c45ee3fb2630ded05. 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/bec9798b-8ad8-4868-a834-5c9bc84a1f00.json and https://artists.proofprofile.net/proofs/artist/bec9798b-8ad8-4868-a834-5c9bc84a1f00.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 0x80acd2caa475d1d3a12d4d99fb1a65a54689d135303ffca94e67262d41e3f38c. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:08:47Z), 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/QZDA71956892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ff53bf79259c10f132d7d2f223576c34bc3819e2cbe0ce308c0d33fdd690bd. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZDA71956893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc234bf79c728a0c690b7d50995a246ee3d12f10eef22bba579e907e80aa56dc8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA71956894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf9ab700368947b87d21d7f6118f6540843dbd3bcf607cd1b802c261dbb3438. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZDA71956895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a5d1211619a27319b5e7f966b00b30d3a1a3471fdfea6bc16660a0d491a244. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6Q2149231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1a71aace279c453c78b950311f55b2b1daf1081d7bd5eef038475c0df7235f. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZNWQ2101402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb157328268c9d00a1be1488838e8095e80f999f43e711f5a50dd8153705eb75. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:34:59Z), 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/QZK6L2236027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514568c1ef3f3f856eead5c79ccff9794315105d0a12955a11592e42e8cb81ea. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6L2236028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d6f09c6169d53bd256346257bbdab474e7556b7e51872944e4c2c1a228982e. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZK6L2236029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa895b49980bc4cc6abfe9b922738468d7096754ab72fa204aa13ea682379fa5a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:57:23Z), 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/QZNWV2378289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8750e2a32364499df5c3021385ef5f0dfebdb43f7a343217c3c0f9352da066e4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNWV2378291.