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 0x6ddcb46e0a777241fc1498d9452fea856ac5d9f42cf8fbdd23564d974e2b145a. 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/ff0d4722-b45b-4610-88f1-93a2eebcafa6.json and https://artists.proofprofile.net/proofs/artist/ff0d4722-b45b-4610-88f1-93a2eebcafa6.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 0x55ae195402e84905e10dd2a8e1b724c51bf633d5d1ac024f5dc3a44c9ad9ef75. 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/QZHN92236454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2add32141acdfa6331801d8f0d90466ba20a7c970d90133b322d41835597c4. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZHN92236456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc93c7917e86ab378f66011ee6378671ddfd95d749d517511ad37856061e3f85. 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/QZHN92236458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810a053e3987da8b75097ab2b1434748aa2123f3aaa2e79ae8f6b562449a2277. 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/QZHN92236461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f174508dc7ccab2cc796683f3643a1c6d62ced790f7eaca13d2b438c2f6564. 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/QZHN92236462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101b27b2cf94a080e882a9c57278f99335e9b8d6ea835e3cffea049f1bfd4df7. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZHN92236463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276d244d771c453ed2a28d93e723c68778696bbd1fa97ad836d4e07ac023a51a. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZHN92236464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5d1bc203221e1dfd6315d175be1ad0a8778b6fdee9b85ea16a79ce82342c12. 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/QZHN92236467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc6ead36bd33902312ad2e5753b39a94565f8da45613cd23d66fdebaf555126. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWS2229561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a13e420b32d13ff101ca646b1b5425f510af45fada6bd37e7ef7fcd7ce1fb93. 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/QZNWS2229562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c4ae4c2d26ae0cc8d0904a89e78d11f5620a4c06136b3ec1bfbcee34ca6ceb. 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/QZNWS2229564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0a8968b9df7577ac2db78183344c4f65b5d1ec29349e3c3b37b1fcc3869ae5. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNWS2229565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90737b7a270872cae032c0a07fa713d530062d3688cb5bf5c65c934efbf408de. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:26:50Z), 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/QZNWS2229566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4afada57def530b9cb2030d46fd7ef9bcac4d770cee945086baa607deae44cd. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:15:52Z), 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/QZNWS2229567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb98b042363b20c780be710522ad7b4432a33a3dae468cf1f86947b04e577a6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZPLS2354372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8c9d379398e144f21b5907acc8e405d03dacccff65f8b857defe0d15a16600. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:06:28Z), 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/QZPLS2354373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a655fe55f193178685bfae98e37de58996ea5597acbb7b510b857482425a610. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZPLS2354374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc7d31d7e6c56b4d252b18fd4d0b356d0fa3580830e0c546489cfe1a9e1b857. 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/QZPLS2354375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ee9d8d34026f4dfde101d5a04733dc0748623216ca88d095ac58cc67d1bf9c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:38:20Z), 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/QZPLS2354377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62945037f95f9335a1656dfeb784f7b62dc22a4cf648b7dd2fca40e252c8056. 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/QZPLS2354378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19dbc516fa2868af7269d34da2c2ed0ed5f50174dff653acd5f8e4a4b2abf3ef. 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/QZPLS2354379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf206ef957044408813329f3b76cb743f6891f921dcacd1b4a2a745b36da18f5. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZPLS2354380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea3f7a3a7908c7907a7ecbe36b86859f4ec209fdaf2dabe95a15bf6c5eca19e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZPLS2354381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0548f3e67999217322da91d899d7bb69845f33fd132bac0c9243951a62e9aa39. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:41:40Z), 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/QZNWZ2491434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c208811beaebca55566987ff5c2d331782cbfcaab8f0c3441f8adb0a52efee. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZNWZ2491435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ab25d12d79937823ca9e7fae0e2b9de84979e60c7367284ca50abeb1da48d1. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZNWZ2491436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb83e4903da55b2e24d45e9c25e92f50989451b84924d95d13ef707b9d1a0dc. 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/QZNWZ2491437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211a80442435dc47bcd3a8a64a4e835a75a76e10f50a230b15c20affa4019eed. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWZ2491438.