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 0x09a635dd26cf3416ebb3f2ea8ff9c5b90d7c86e9dc972c77f8cfcaa58e01a5c3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80ec66d0-dae6-4859-93a4-9c6fba513a37.json and https://artists.proofprofile.net/proofs/artist/80ec66d0-dae6-4859-93a4-9c6fba513a37.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 0x0ea0ccb2a4fb444fcd18b7649766b198a97cb087e1e9393fdd99b1e3906a4ef7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZK6Q2242302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7258fb8422b5f2e9eb0d1762f58accd82ab262196c17a25c2bc1f5e3d48f8b08. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA62015908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d40a1339814dbfb2c0073afe18d04c1b132fe3fe5e1218449f2297df0b654e. 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/QM2PV1728277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf7cb5f8324b924b6dd9c8eee7b80b63ffa26c7b873b00060fcf570e3a1b3c9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM2PV1728278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08249adfceaf860d577c452ea046fe1bc7765cd2be928631bbbd0be0d155683c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM2PV1728279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ee2aff2db053e0b4bf858273bff5e22bd013d4a30e9526e6c82d9338338dde. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM2PV1728280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa007e6abd76a45ba33e207050895bded561842c947e587a6cbe21c146ae5e3ca. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM2PV1728281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04cb5dece1bb9a86ee0b6eaab67003056eca2b1f06d94b13c2e90980053607d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWR2094560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a37dca049e82569685b85850df2e3f5c8c838b4b7f666742dc6bc74b0e896d8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWR2094561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12c50595a86919954bb780999a36501d6be8e5bb39fbc05dc77037ce7cb9d1d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWR2094562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94269d50db7ffeea04bf4f8361d1ca6f4c9602fa63602c066b18fee943921a23. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWR2094563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1a3c038a0a15ff32e94c7c23c398248e137ce3fa3304529bb888d92a76df2e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWR2094564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79ce3574ec2c7ec7d0cb9f05e101016a23134812696da154074fc879f9f0cc3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWR2094565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3014a50795fca2fd2986bd19216772a5d6c4989fa19d135b3c2b881364779c82. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWR2094566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd204ed37f7b221e1860cdffb4941054f4de5af356e69c214a76707660b667d18. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWR2094567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c4c6bbe6da23855032e9d3ec98fb03a522683b2ab969a5e84becb24c2d5105. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWR2094568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5341e8f5b14e5b8411d1981e520572c57a2f951924bb8d3e9cf7c4c207e3db93. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWR2094569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe440f34f8824fa78b2e81f4feac631611193c284c08b460a12b6e7f95ac52de. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWR2094570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54eb64fcbcd0a50ed209c66fcc6b8f630cf431187ce0b8be990f2dcfbdd470fb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWR2094571.