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 0x6a2af41d655b86001f1a89b5285a7e7623316dd012796b776c188855f0f0bed3. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70fef1d9-41e6-4d09-bee6-0827c1cb1eb9.json and https://artists.proofprofile.net/proofs/artist/70fef1d9-41e6-4d09-bee6-0827c1cb1eb9.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 0xcd9083cdd5e04f2ec5a6cbdfa64311d2f3abe42ad9e361fb8652ef207ce2661e. 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/USDY41948512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90da15770cb0689fb978e4e7ecccdb30e9ca58a544f4e34289f8b1ac46dc4db. 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/USDY41948513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90c992e82f0cd7616e4967d1978055f22d9f4d7d65c3da9f798a34718a0e9e2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USDY41948514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2448ccda9da3dadf647119b66c5039ff21a6be45b0fee88157df1b062bb98269. 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/USDY41948515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24799c630d69d7a6841dde30e3c78edef7dc24fa5e6caaccce5c83e77fb1a619. 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/USDY41948517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b655463ff6ed19d5ef73a26686f3d97542a4598db99df00b97c90f3538c7ab7. 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/USDY41948518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3698983d319640cd07e9be21101bf87097a6977147a430b98f0d1340b7b4390d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USDY41948519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296a865f7047c46d27163e741a37834f935a2a700db35b2208e28c8920cf0234. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USDY41948520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff6ddeb1ed71a22051428ec05107cfbd75c09466b701120bc0f150c055980e8. 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/USDY41948521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa9b9f883f420dd2dffbec07003122da737c0f9510e66ba643d070c28e4ec03. 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/USDY41948522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3997e1e1cd733b29bf77f36b93cdb2656619a10b47553dea373344d732506d54. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USL4Q1715998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783102139445dcd96beda23a820681af5bb5d6fba42753a9b45371f9181310cc. 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/USL4Q1715999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ac4c9ed6ca14dafbe02d7acfc25efacf3720bd05fe8dfcd106b4cf3030ff9e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USL4Q1716000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6f7ae40e582f046212e9098b808415feca587e9e9b03608091a51b3417fbc3. 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/USL4Q1716001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e5d504991f195149407610dc1da2cd3972b8580655303b733663b209ac8d40. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USL4Q1716002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e64a850a18bab102baa5009e940e877210dbbe058a4f14eb75507f594bc45e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM91409140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7e74d71464ea68411b0b9abf6ba69d40b6dca987cf1edbd79f10714c625c5a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM91409141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27b4caf3bdd9bb2151b044c5da0d351d30376e6fab4b304145d4d284c3961d2. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USHM91409142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ffe4feefaa4b59707951ebf9d516751a102fa88dc04fb6fca6749816859aa2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM91409144.