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 0xf609c752f0141a90180a27083351dfedf88c2ca3d0854d30fcb3b2bf7ea69c04. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/669ab0d2-b0eb-456a-852e-4a6ff90675b2.json and https://artists.proofprofile.net/proofs/artist/669ab0d2-b0eb-456a-852e-4a6ff90675b2.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 0xf9eed8d3f7446e80e45682f8fb2f5f3ee00ee26cd7e27061b088c95bb695f6b6. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/NOFGR0255010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac29f67080eb2ace7aa1c3eb841df08da6e016cfd93f1f19927bdbe4fa40758. 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/NOFGR0255050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9480474465ad75f2aecbe1879f0ffd259d6a0930bf69087dc8321910ca1dc83. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/GBAAA8600644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8fb53bee69defa3934bc55a8d0c74935da2923253d19eec995f688568802a4. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/GBAAA8600646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c636d5dfe8695072967e6f93d70d89a63346cd7cf5c70f778033898629fc67b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GBAAA8600647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c8b2d31112413adca9eb460721324aad206792b452ee04ef3ef9cf77b824b8. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/GBAAA8600649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc43b9525e9e35573a54c0cd02ec9d95b993f9e9c2afe7848de3eece9d96291. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GBAAA8700191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6c93f6d294812005da97c7c473304c0df91663ad4d16743a4a5a1979443150. 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/GBAAA8700196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51fc9f2c9e71985c324a464d3e25f90cb37c3e7cbfa15e7e917a0661476c78e. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/GBAAA8700197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf904084af7848afedd29bc0378c83f88f3fddaebf6df5b9c4ff265fd32bec63. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NOFGR1188080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a05d9c993d05c906c0d1662c5b0b4091492318b6a121d4af64665e29446fe73. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/NOFGR0577130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433e8e9103c5e7a73457534bda171d393028145b569b20bbd3c829d0a20d7b3c. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/NOFGR0577160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf200795648ee9b0906cfc9045a8461561e1c86ccc8e3db5b8a3f9034a72f10. 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/NOFGR1199040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fcb830db66e30916b5d44c554b7281ed18e890b4d140ff3522266c297b673d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/NOFGR1199050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37694ce3c7181b3600e16d00cd4511173c02037d7a11701fb4b44a6ce7d9941b. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/NOFGR1199070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dbaec8d17d16b9eb5389761f46f10f1bdcbd990cf6bf1d52482e36f3a37c08. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/NOFGR1199080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663ee3738c623645fa0c4000a502e1000531c2450d270012e9517644779004b9. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NOHEK1218040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e3df63c1ee762950aa31d6bf437172f4806fc50f7b3d21bb239e422594df91. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/NOHEK1218070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b649abc283aafcefbf75d6e5304f5be3435c1953705ba913edff9d77865dfd. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/NOHEK1218100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5429d3c09da0f9a7273d25e8a7ab7877107b9b0a430ef465773eecde5e7ad10. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/NOFGR0266030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6868f7422463a1ab8a8d0e3701d6ff15f0ba7da05a5adc109b90e4776324b661. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/NOFGR0266050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca38edccf873bd912389f1b1403b4ef9f56520d854c495b45691f8e451cd967. 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/NOFGR0266070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3cbdf09c811aa5067a4e66d07ce6843da41ccfb5d8807267a72fd6f514ee95. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NOFGR0266110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac0f8b954bda2b5299a05e3b81df2c3a56152feb0cf55d76613d7a5186b8237. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/NOFGR1815010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8f48e6591f0187eda26c186082a01f9e97089cbd5314456a0c6919c435a5a1. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/NOFGR1815020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e1830f0993032f095bc426a52264b920d1ec2ba675fdbc21b7b844e0211dbc. 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/NOFGR1815030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc050f4530350faf36d2cdaf1753400fae9c7f12e6dbdc33278daa1faefa05f3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NOFGR2406010.
Golden Slumbers - The Very Best Of Vol 1 & 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8e14be613802514bb066c576b9a722e8fe7fff612a428d2815af3773dda4a3. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/NOFGR1199060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10ecb54da0a731639389c10a4bfd728dd521a0ffaf09deec6662c336ec34534. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/NOFGR0266080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b3a2b3d63495aafa1177eeb5bef68346b280cfb43390d3c87cb8e5e84d6a99. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/NOFGR0266010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5429d3c09da0f9a7273d25e8a7ab7877107b9b0a430ef465773eecde5e7ad10. 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/NOFGR0266030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d1f0e530cb6a16734b6324c8a2e2c7e53c315839b6643ce10566443829cc1e. 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/NOFGR0266090.