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 0xe7d897cb985c7de477d7da4df48794966bd74cc34636243cff2b1c5c09bf3db9. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/455b3e72-a161-4c15-83f8-10b93768a683.json and https://artists.proofprofile.net/proofs/artist/455b3e72-a161-4c15-83f8-10b93768a683.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 0xdb1865192456462b18373f2698e8af8dae490082698bf37bc263f43a298272ac. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:45:30Z), 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/QZES52581370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f6e3e909296713feb0d6ba2ed405adc8df0d54fc8a3e807277c2f061dd4750. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:50:13Z), 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/QZES52581371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90132eaa0201331cf37c998a268b6d5a9cb58c31f2088ebad5c2e0d1320ca82. 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/QZES52581372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f4d31ae7f348cec276f958e48eedc470a0fb0b42a4c86f7a305289bf53425e. 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/QZES52581373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5ea07fd3c4418371765e1181af564562f71de3ef950ff4a25ff6cba00ae0e1. 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/QZES52581374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8c4eadac8a4bf7cf6c4550ce346b0e749c678d20ad8b90cb94fff44e1fb564. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZES52581375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177bd2dfbb9f68d85de8c1291218cd7d7d8bec15739ebe79ce1b49f58998fa44. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:08:34Z), 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/QZES52581376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e032b448c6ae1eccc0157fc79ca8aee28b2c242cf088f4f56e367e3e282eafe. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:12:32Z), 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/QZES52581377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d744adab37714d1219a199e9675defb8dff64376a94807b6b83b83e19f5ef9. 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/QZES52581378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c2b0820be695b23828f8e4fc5c8395ec1553b3d092740caf1528e0574484cf. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZES52581379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05566771361a7c34a84ad411d88f321a407382bd9251f4fb385115991f07ec54. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZES72593906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c9551dd532b3848985644cba2b502d4fcec59422f786d154b62de71d47d010. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:56:53Z), 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/QZES72593908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb238d512365bfef211cffec8a2f5d304e3522f34825e8500623af689e47b7479. 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/QZES72593910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f2b6daf6e477447e86b7eb05a3147706c16a070ba6c527d2f8b3fc10cc0925. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:36:21Z), 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/QZES72593912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f1d4492bd90f8ef360e27da06c5fb6b8e640aa3ec60f15b9f2630400e37b67. 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/QZES72593914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea05f3591e3ec4604bab6a46f6f032d2737de3d38c0b7c017ad0490fcc873e8. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZES92521170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49cb0f04216163309cb6ba8965be1a34548ecf1a41daf03771bd3e89f6d0ecd. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZES92522948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46696bb807f785e850127f558239121abe5016fc261cb65d62300e53e98a86b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHN82547890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6fa7d2bcae085e01e5305f8bcb030623040cfb968b3cc327ae10c7a5cba27e. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZHN82547891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb53ac822a76a06f99d3ac55231d1005d8b6a9c954c33d8f8954c46cb348a990. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN82547892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08397242597b5bf9e36575e9f2f0ac8b2f58f523a0c5bec32c0501d4282ace34. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:42:13Z), 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/QZHN82547893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5531392c7e4a038dd621885500a6ff666826c65b8ab650025c96f6fc0e3529. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZK6N2550195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2997c2c2bdc30554bd7a58382d12865a628eff1b5aae87d1b9ab49bccfc884. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ792586525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ff63ebc7dcdf1e611042cf0d0c1beafcfc65217c13ec7c2c420184d50826f8. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZZ792586526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbf392ab7ca86490fb381f9d5249f3856dbe5bf2bb0fe2ecbe4b4a21119eccd. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZZ792586527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc8929f8ab715d07ef0757ba1a717a8eb6450b28c74b7eb2030d733a3ba79b1. 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/QZZ792586528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe21f2cc4fe56ff2cdd019f71adf46dcc6294e9344ba588eadb1fa1f4a58381. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZZ792586529.