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 0x7c1e22ba930b7db24659eb5825ff13d6c6b82c4cd3fd400e8dcaf5653d7266ad. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1221932-8463-462e-991b-8716fcb3f872.json and https://artists.proofprofile.net/proofs/artist/c1221932-8463-462e-991b-8716fcb3f872.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 0x2757e1472dd5bd2f2ad9036b464c683c426eb738c904a0497579a36f107fd477. Chain 2 (Bitcoin): anchored in block 957540 (2026-07-11T08:19:50Z), 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/QMDA61843945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56071aa123234a621556bfd1ac26e95519aa7d6d3bb03a8a385e05d3786af16f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:13:37Z), 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/SE5BU1943160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b4eb758e369c6e04716c5ca377182e96f6a276234b6f1acf68ce5f662298d9. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GBSMU6294730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea2b8e620533952b4b6775e670235ec37eb8272a5a1a86fb1d53f2ac8c87f30. 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/GBSMU6294731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c675dfaf2ff25e3d486b85aa6e8ea3640e28f1866b3121c106a2d542a5e63ce. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/GBSMU6294732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea69923a59de70e575f6ce2a9e19e730ab693754621379611908144adaac2ccd. 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/GBSMU6294735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4aaebd7752bbab1efedb4a6bba1938286927f6d8d6c3541cdf3618afce0502. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:06:27Z), 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/GBSMU6294738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccbe1a89fe5bca92859a51e7682f87f5a1a170814a9e29c4de5731eea0cd1ad. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/SE6TI2301176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5658f3871f69d3cafe149d0fa93d87cc72ffd07063b79cf060e09e82a43e3337. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE6SA2327216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ab6d9ba38fc7f299e2a595d75d62ba1106020d863563c58c2e0620d97a6004. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/SE6QE2328784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44a0aeeb6e6ce79cd2983efca541a95d48d0984e4ec4cf3c24eab189fdce25b. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/SE5BU2353163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2406f31dd692ef8c1a1d5f2930bc497da89bc2c59d3e7cbd0be2bf640de0d311. 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/SE6A92390569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f33927e7d71f23f7382f1dd6c77ff1f513c50a6e26b2fe6d6c458142d9073f. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/SE5BU1735570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91a2d780c2b3ac6549efa18ebd03c612e8d7ec4c4dc197a74b22b053d69a8c1. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/SE5BU1801429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb278d9a1655418ffd256573d12572a5b448ac15a4d8a667f85931ac7b237a9. 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/SE5BU1814989.