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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43cfbf9a2c8426e3e5a0a43be840d3694af6fc135221ab8c675318d40943445. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d07cc0e-660b-4b26-bbf0-ff6535a324b1.json and https://artists.proofprofile.net/proofs/artist/6d07cc0e-660b-4b26-bbf0-ff6535a324b1.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb50ff839382620901a11f8a55ee550edca6380ffce5a7dddf3534908c39ea8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBLFP2318822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997439fc08b6a4218bcbac98628853053102925f2cb06844c0ac7548a3a62837. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBLFP2318823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae89e7f296be639834b2a92bc80a5b95e3a7f7d610fd6eb79bc70431d4757b3. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/GBLFP2318824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7046ea1438996de704c0e20938df015be8308f4008b2cfceae35007ea8aab19d. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/GBLFP2318825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508d54adc8b04d49d8badbe481056149cbef0c4e7b160b587bffbae7bf63cc7a. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/GBLFP2318826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb093579968c60e3a0526a80db0af2ea2823545d0ceeb4affb4fcab0da00dd9ff. 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/GBLFP2318827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dec8c834cd24399a2e5e00777b16ea05bdddaa04652b827aaf742fe87f171ec. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBLFP2318828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cfb831eb96b9071e624e6196d0120d63612bca51950f4f82292b0da6dfb2b8. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GBLFP2318829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f96e94730f170fa4d65b360aecdf97af114ea3eb4d75855fb21593835544eb. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/GBLFP2318830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7002604f31ea05f0dcb422f444bf5effcea240a0832863bcef43c4e747cf92. 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/GBLFP2318831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac3970db489c952f915b7a4e518209166f4d676b0e5b7848cb6c60232cf3abd. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GBLFP2318849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5d69f7ea992057230540c3f138de0d0b5d9983a46ca3a8325bbb247d8db68d. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBLFP2318850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b5b37e0de74485bf63630dae9b4e854ab5df586de2ee3d049c4afb8359808c. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GBLFP2318851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55781f4441e49fb21adc4e0d536d18c7da793a4703a6b8d5b54dff2afb0e7acd. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GBLFP2318852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52e4dccfb7cf7bd399918f6ff9a8d0ede3f32760d486a665aa760345cdaa083. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/GBLFP2318853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50807d4f2a151358f027166dc33586ff3ff055a7103d5ee25e27ec230931775. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBLFP2318854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c0797599b22940531817dcda4710c21ae17659a71e74ef32e51dbb0386fc32. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/GBLFP2318855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bb7e90900ae8e1b7c7adb77c8eadb804584c44653754f920b068655175b2fa. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/GBLFP2318856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf093fecc4bbb46aaf46a6dff13c960c785ef0ba0eb1ab1aa08215752a3c9d0ca. 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/GBLFP2318857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3023d0602d9f6be435dde9e0782e556aa597287f0a6b36cdd1d777c2c2e914be. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GBLFP2318858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4e0967b0bffa829ece431ad0642eb47fa60e8577ed7b5fb2391ff6ca5bb736. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/GBLFP2318867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220145fad6a984d99fa93ed03298944869cd221c9ca14fd016ee05d86e8b22d1. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/GBLFP2318868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e75f0364869e4d40c104340797ff0674194edb3daf8587635504b20bd903ae4. 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/GBLFP2318869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078e1704e81c689ec791996fa63ffa1cab0869e7703bf4d16b226804c719bedc. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GBLFP2318870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708c08fcdb86a8e3ef08e3717c0591a73aec5e7e3fb0d47f9e35462aa3e5da9d. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/GBLFP2318871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5875d4e0efb930597242082a275ce3a43e867c958926c8b5f6983ca9b22efb0a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GBLFP2318872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff998b1fab54982a660e31de7213ea22d4085754af0036b56bd0b5dc5b7d861. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBLFP2318873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a1148ddb17e9ee0282c3a93c746af161d6d1ad2246e522dc303899f9fb6d0f. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GBLFP2318874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c75d474cd94c3a3775eaf1e42897e2dede05aeb664f70eccd3ba41a2f7a5d1a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBLFP2318875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0fcd4c564fe67c7ade68993225a05777f8169eb88911aa7b5719a0293c9a9e. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GBLFP2318876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281869548ee4ff7b47f5f860933e5f3c362392604d939e4b7afa2a3f867c4c82. 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/GBLFP2318837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c61fd720df1763ce107512ed4cf8ff290cc889077507d0e0e31bbd36bd765d. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/GBLFP2318838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc81fb3c26773de5820437f06c5f6ce3e5b7cd8d9cb3879c57ffd11c35d516a7. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GBLFP2318839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00a80a95da7f896c6305d612ef9bf4130769ea36d68de0c6c8f445a310d7b9b. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/GBLFP2318840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863361c62ec9c58cfd1bb8b87f09e067d8d2ffc3930dd67253128511c809832f. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBLFP2318841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66f960071898f170fce4c33dae99ec9b7a8db5135d81d6808ee270144de9b82. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBLFP2318842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70de8b68574714ed4099246e5cd45938924ed8d01b4a6a493df1e00a273d7ec1. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/GBLFP2318843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000917d5880c9b167a3987b00a8bc56793762d845ba46810d48f5d9f4a296374. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/GBLFP2318844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d7beb171c3edd7d48a5d375af5a03f2931a9ccfc839ed712dcbaa829ff923d. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/GBLFP2318845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79664d9273929b527ca2381a7d2628bb323d93fd0cb7d954d5a968d44930dfba. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/GBLFP2318846.