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 0x4990efdf2c47ab0fe269b929a949bc8943808ef8fcd3dd073f131e5093374c08. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91d4fbc5-8061-4a59-8aa1-78b0a85932bf.json and https://artists.proofprofile.net/proofs/artist/91d4fbc5-8061-4a59-8aa1-78b0a85932bf.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 0x3f8cb32ef4d5718a49dcdfd6e19eac5c3ce2af3d895d63b00cf45f4e71b839e9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA51996319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb5067969a0e9ed6e85b4c3af33d9bbddec8cba2a79d1340fa74d82fc4b41a0. 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/QZES61998555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb0a9d3c9db69c2d1a4ef199c98391820ae1d98c4547bb1343c7f0bfde64094. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZES52090956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4d26d39324780cd5f0dd2403f51a666cca16031e140056ec0d76f7f3a622a7. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:36:01Z), 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/QZK6N2066053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94758a043e47e1a69ec1b77d38ad2c786843c8c1eadbd832891510c1924f78b5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:02:36Z), 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/QZDA62162610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b7d3bec15b31a21fabc711b7496779c66a23faa0669042ac817ffa0732a8df. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:00:11Z), 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/QZDA62162612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113301db82e7660fe3d3ab387e2d823b402844d4e856cb17b25fffb67eeb9ac8. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QZDA62162613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5828ffe3a250c903f26ebe3c9f5cd8c24a7d5a7dba98794e672802598a032da2. 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/QZDA62162614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9c2f62e3d8e8b94b13eb7bc6b4022bc9ae7f47ac4f6a4ca18ccb72575c8ec7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMEM2115792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1750a49e1c7a4b481f566ca2d42de55a1bd359c0848868eb6cf75e1d416514. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:28:13Z), 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/QZMEM2135142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc1e96ba5db2f8a95aa22fe30cee726487a129d8c4e94abde82c82f130feb96. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:48:39Z), 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/QZMEM2146266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cac86543a54845bef067f1ed1324011a9cc34ca8043cb02275deac20e2bb8a6. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:40:19Z), 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/QZMEM2162849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb580b8984eb5a39fe45015ec04b0459a2ff45cf8d11a0222d0fcef810c69dffe. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZDA42276851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcdf54541f33a0f2c96d723e34a8a2c950b75c1f8769da942b1a330882f412e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA42274586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656fc60972d55c6467e560906c7a0b04aa879e8b4cdbc8f517c19abab001274f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN42251966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41432a9299290f387df14eb85c4dc5acf6c4dadc0689d3aac56f320fb7ade808. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:15:16Z), 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/QZMEM2290180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9544c47352e5726b4a419444ee1b62e1f803dffc7d508107a8ed5ede83d0c7f3. 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/QZMEM2290181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1c080ec9934e263b21ec3159f8d7479a0e7938c7dcd5ff8356bb29f59e9b81. 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/QZMEM2290182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3763c36997bbfdb705a078548de25c76f9297acc102712fdbbb4633d830a4085. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZDA52042984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa58851aa386337f6b693e0f722beffe6712e98e391bdffda8bfb5ca68bb20cc. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZMEM2290183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742338d3ae23bb56cd671f2053792920e6dcc6f98b1b0b53439bde3041d734b6. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZMEM2290184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d243b85342bec8a28fb88770999c2cdfc9c1c0c094b80d9b6d6961cf7dfc74f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNWW2153709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abaabc28772c12d7a458fd4e36a290dd3352c6d53774f491a7a766c4bce31c7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMEM2290185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5610df142e3ad36ab325ba52e0dbd3cd3f221ee60a5c328831ad51371a9784f. 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/QZMEM2290186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579decdeb5b20e0361adcf9860168dfc85bfb2af16f62e5144fbf8eac38e7504. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:38:49Z), 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/QZMEM2290187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d42889f7ac280d34523bcc80ed68c60ad1c05ac98f855158ce334a5bcf0ac04. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMEM2290188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4340fe6d7e0ff7beffd43c658f5a5195d9eb30f0292fdfc0eb2daf2133cf38d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMEM2290189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc975780200495ee88f23ed3933f4a1467ba1297be2968837c9f2701e3b6732c1. 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/QZMEM2290190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe241f1669b8261202cdb1d69b6abab67b648177483d348fe608e25cb61105bce. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T16:01:21Z), 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/QZMEM2290191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9552c4be80286c415559af4cd29fd232d19a476657ab89a3ceef68ec51a8b759. 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/QZMEM2290192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b134357e0d3c737ef4f41bd6bbfb8a6a05f01fa16fbea5a83e356253dcd21f. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:07:18Z), 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/QZMEM2290193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5956e1eceda10afcf246fd5f00162d92b8259d5ea58274e93a5a620b9bf1d68d. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:51:19Z), 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/QZMEM2290194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc31479b562abea47f9941f571e904a7c1e50f68ed71968b331c58d856070cd2. 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/QZMEM2290196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f49a7864f7dfde54f233203b7a9b9d9869a71dd6390be471b5b2e4e3b17ea7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMEM2290197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb151d3b29195663a505a4fa9c5bdc6b819615d3e66e1cffa035fd1298838e32e. 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/QZMEM2290198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6559c752112da6dc1166d669bdf6080aba8fabeb4cae1f632d5161546b31c774. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMEM2290199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4b707775b8a8dae113111640d9074ba49fb63aded77066d504062b2788dce3. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:45:21Z), 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/QZMEM2290200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7b814f00ffa98048c1943d21ce4ee85f9b641ed85f434e49e614fedc00e9c9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN52492550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b48b05805a7fd9cef80d383e9298409d4a38f4f74133dfd92051ac7271f5018. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN52489527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe426799a46c007a49f1b648332c511388d1e1f89d5e2c6c91c72453cb9dcf27d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWV2433941.