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 0xa021008b70ffcec7cb4d03f7545d3824aefaf213f1c725110b6118bc8c04fa8e. 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/42cb3e91-a0fe-4f5d-845d-0ffd29e7e867.json and https://artists.proofprofile.net/proofs/artist/42cb3e91-a0fe-4f5d-845d-0ffd29e7e867.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 0x68c84f71c8b88863048b22f2fd991487c6d6f48c84f0903959f10f65edbf8a7b. 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/CAQ8S1621925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971a2a6d02cbe85c389043558a0f0ab021151efa0b65c09c0c2e78cdeaafeee6. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/CAQ8S1621557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971a2a6d02cbe85c389043558a0f0ab021151efa0b65c09c0c2e78cdeaafeee6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CAQ8S1621557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8e44af6064d7c145920f3e50ed9bf77ceac718384be259c46a8967c028682c. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:43:30Z), 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/CAQ8S1622462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4743109ea0766ac13357dede5b179bd512453e4cf7531e274c4a2411199a21c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CAQ8S1622886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4743109ea0766ac13357dede5b179bd512453e4cf7531e274c4a2411199a21c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CAQ8S1622886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c697ab144d814496ab8f2888b50bb3c3c790233449881c4250bcdfe5b86c67. 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/CAQ8S1623042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bd1f7aa5d66f8dbef5e5aaac324ccdbcb699a6b52da378f435b3ed810f170b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CAQ8S1624449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c24b2b4536efe30c4cb220501f7b266bb619c92f62235f8b217582d62bff88c. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:53:42Z), 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/EGA1K2203488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827cc93647f9d2492baa2fe363e1825eff4d481187567f33081e78d2f09d64d6. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/EGA1K2203558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827cc93647f9d2492baa2fe363e1825eff4d481187567f33081e78d2f09d64d6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/EGA1K2203558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701335ad67c22dbc123911fee359be9f1a14f6a121621c2ec3d0983401cee864. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/EGA1K2203812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62397013504fa8b697354d106f30cd9452d7c8ebba38f2788f05735c0b705c0c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:02:56Z), 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/EGA1K2203813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62397013504fa8b697354d106f30cd9452d7c8ebba38f2788f05735c0b705c0c. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/EGA1K2203813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b17626a0d1fbdb30ba10b7652efbeece2f74e0fa8e9b8dd9de8288c6f75255. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/EGA1K2300360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b17626a0d1fbdb30ba10b7652efbeece2f74e0fa8e9b8dd9de8288c6f75255. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/EGA1K2300360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1802fa0ca9544eaff8efc76143d4efcaef4f03e99668390d9123e67f2ea6e5f7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/AEA182300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9979ece3af03237f2d6d4a8773d4c31089b8618146bab99031635405e4914fc7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/AEA182400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a017bfe2053b1854688e4966aae71da0ad98992363c380bd3c0bdacba80efec. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/EGA1K2303758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3459dace0d97d9626933acdd894232c0f1a4a2f50876ae78570a413182be0dcf. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT3FC2562994.