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 0xfa01821a84750447ec24b7ccb679187890d577bd07b57de54793378c5b30cca5. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc315a60-f52a-4c68-8987-7b00d592b16a.json and https://artists.proofprofile.net/proofs/artist/cc315a60-f52a-4c68-8987-7b00d592b16a.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 0x252c71e24e7b61b76f0669cd178db1637ed43117d9d9e53ed50954fdd0b5a40b. 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/QZTAW2554777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a521684e1ae40eb4e3e7fe37771d2d74775759427ea0fdaffda2035c4a7f07. 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/QZRP52508414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaab4335f113e8d015a6d3a720669e00d5b93ab6846fd77109557c5f2b006dca. 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/QZRP52527574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddcf39c6038583131554b08f2b07e17ffc2c8308aa06f70de596726d288ce241. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZTAS2500476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f5fb02718bc8d5d13ce3fa987548fe78225e0fba35dccf87266871bf5ac2e0. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:39:24Z), 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/QZTAS2509723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5b8fa560a3365bd61b8510030cad73b6db19f9e48cbe956dce01a2080a9e31. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTAW2554795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28334369a8cc5242f40e2b97c96af0bb1017a1e187643a3aba85d15af284f870. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:24:15Z), 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/QZTAW2554735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a68c5387926e800ffb71310575e17b4aaf22d4e4db6ba87c4134145a302949. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:16:38Z), 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/QZTAW2533662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51de4299d097bf37aeb861db8df18610c8ee664cb6bbd7e84c9a1d5ce2a790e4. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZTAW2554789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d51f3cce2b162c054f29f8e1dfd6cfdffdac80c558951ad5e1220813fcc633. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:19:33Z), 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/QZTAW2554706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17684d88a46832a61b238c9c1feaf4db07ddb75b7b3d42faff7c6e1a651358a. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZGWX2087792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7492275616b0bf813cd7e32755bd9d761c6dcc100ea885251c75e7c22d8e41b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:20:38Z), 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/QZTAW2530081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac8116ae84e43929a4c504efa7f20d8e016fb0e50662f569ae7449fba51cbe7. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZTAT2553620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63eed2245804f9a61cbb9bee7e28bbfea583c8d08b0c040243e00d874a3c67eb. 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/QZTAT2557234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c529bd2d1cd9cdeeaf54882127e6a589e4ddd91b91531817c7c5b706bbe8cc. 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/QZTAU2520116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62ce170afac6b507c4f7fac46ebe47797cf49774ee718bc14386faa0895bda9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTAU2521678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2920a258e67b3979f55ae8fa623be850e3bb37023f4a6b31f6f0b4dbedd267c9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZAKB2420003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bf7d31002ab4ebedf6bb09b7f202fbb5e82b48f77e0fdfd0f096d92c6c131b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:38:52Z), 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/QZAKB2420021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c96c226818a18f9d0d2b0267a5751e6f025f5b39a6acce94adac04dcb88d9a. 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/QZAKB2420028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea31582748c9fa19317e0dc4baa1c0e05329d1e3f3069d349fea48f8db36c11. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZRP52530592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17db26534290148a6a96a44392eee75a4c5eaa3419cfa9243daba9ba1d82d2ea. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:20:13Z), 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/QZRP52505763.