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 0x955c36d7983660f3873c57c9179e4e93f64099d9d33bc663e2c48b5c47c859db. 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/7e28840d-8ab0-487d-bdc9-1411ed24e210.json and https://artists.proofprofile.net/proofs/artist/7e28840d-8ab0-487d-bdc9-1411ed24e210.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 0xa6ad79faab131ebbcbf6fbdc490ad4eb24cc6e7f192e6b5e44318619106fc066. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:14:49Z), 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/QZ2J21502888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9911a7c1eceb694e710979f0ebdfc6f4ee22820a646abe2496c7534251271b16. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/COC010526199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795072c14107a878853b3d8db127aa3cef40e01f53ee157b3d7360bc7554000d. 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/COC010526201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad05afc4692d75082bfefa56869b0334d8f1f83ddfe46591f1416f0a7acb644. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/COC010526203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6575d48c9d1ce0cd2dbdd21190cb63c56ce4ea4952f8566c4ab7ee8923ff153. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:19:07Z), 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/COC010526207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3966198bc240e6cfbb2e4d80ac35cb5abc089c205b8b40c212f5e0d922626efa. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/COC010526210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02b88b02a91a829fa9b9095d4f8623f25e755c6888ccde3ff1e499cb5242608. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/COC010626452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0770110f6fd312956cec0a7e2980abc91bf4f254e92edc2f8bb7c290ece4a1. 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/COC010626454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f94712b2080f54fb46057fb94b26a3377d3f9bb99e48511003ff4ec08cc98e. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/COC010626455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ea4994a067d7248ec078343109fc1c0a7566655adba000db8c255390d1209a. 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/COC010626457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba81f2d04be5e0d3b1d3cbba714cf745882d1885694a007a1311a290899fbb77. 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/COC010626459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd120afe8f40e3e613468c957f8375167d754777ed7a9592567e3ae52e543712. 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/COC010726986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437e4ba1132b7f9048ddbf0f1061aae009188c4f6fa2a7b88730b30e91ee4fb7. 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/COC010726987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb938af16c22a4991dda29ce67e8ced62ec7534991bfb637324ca4e77d877231. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/COC010726990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dddba942de231d40de7ef000732e551ee2c5e489ab7d7c86e1deb682d27ed08. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/COC010726994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658e305c5e114d55530f32029cb9779078ca47755391a86ec79993e7f89d9084. 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/USMU40400334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913d42ae9da7005b7e95680917ad1227f71f43b014301f559ec1a4f54d38359f. 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/USMU40400275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df0a14df6aa17a18fbd9b0ce51b0a281ba4edb1b322fbff81b01438d940a2a8. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USQY50823852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c56fa7dc49eee19735098c634ba4552c3cab855e615e7d7cc475e2d3bb06f7f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:58:39Z), 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/USQY50823856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1628a84bd55c5c52a41a0481d8017906fe31c9360c69c290d1e1445c280c60. 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/COC010927718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062e32dd03ac5704d511fd7c99ae130ed5bea01f8bd5ad2e84d10476543a299b. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:09:35Z), 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/COC010927722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662aebf392cb4197b44e1984676c04bf1d003b2e1b5e65f9214790dea29b745c. 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/COC010927725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9da857a3492c41dbec38ce63913d6c341b59a3d7ff5e1273b154bcbb0ae666f. 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/QZ2J21507283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764a6685099f28d39c7fa2a51d10d39b8949f09d0f510d561d27041ce2900807. 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/QZ2J21507870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77aa1712ae874767d1d31cefac9ed8d3b7bf3c26016345c29409dc6d0dfc68e3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/COC010526198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9911a7c1eceb694e710979f0ebdfc6f4ee22820a646abe2496c7534251271b16. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/COC010526199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6338daa3fad84f50fb913bb1eb16e005a2dbf463e8a0b33f6af6534f7a7af60. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/COC010626461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9f36b664e0a336df20bac2fd97b927dd6b12203f01f4f4bd6f89e4d51416bb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USMU40400289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2dde9f9e29a11a99036366345896e705ff962c3144dfb24dc14738751188a6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USMU40400291.