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 0x5ec1a5281e27f64133d3a6f43257e41aa5c3f21f2c2a727a4af7ac23672104bf. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/edd69703-b10d-4c0d-849d-84e30a3e2dfe.json and https://artists.proofprofile.net/proofs/artist/edd69703-b10d-4c0d-849d-84e30a3e2dfe.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 0x4519704878b3e1f2b4ce441afa8bc6b7ee848860241e83dd0d8dc84d51fcd659. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHB2322211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef143d9a8e0b44fc9047e1e8c56d660329f7ef19b461fb236c018e215cba67b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:29:42Z), 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/TCAHG2380148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5eb43c6849b72e13b885b71a6727c8e97c69e763bff66b23e2d4cc096ba53d8. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/US3DF2418990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7881071609b2c6596988d9692b9a03e8fd22f735a82d0fe874747a650364c9ae. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/CA5KR2460629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a904cc7dafd6652a049ce4c71f93c5cdca9faae5040218f5368efd8093ac0e. 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/QZWV32437468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e570d38b39a6dc01f92ebe14138ed9cef5a728e6ee07e2ec4deedf43f7effdf. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/RUA1D2512330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22dd8fde977e0b079b5963b1a7cecd68e77de20bb6bdb58ed5362149b7d9463. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN92498435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2211dc22b31d1061785b346bb8c4d9160100584c09cfcc12c2e788f79b22249e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTV32492373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f503e8e12ed693c076f9ce72e6616df20126acfb1d8e01287955e6d272ff93. 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/QZ5FN2565792.