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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12436c0714770327aacc2f13a3ded239bb9e889037e3cd4b927ebb43a80ccbd7. 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/5f51c557-afc0-4432-a3b1-53ba70bd2ba5.json and https://artists.proofprofile.net/proofs/artist/5f51c557-afc0-4432-a3b1-53ba70bd2ba5.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41e17f3dec596b823a5604b8037bf3f06cb4d39c7ccd16524f8833a3af5b137. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZNJV2330882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc564bde479235b0e078b3b0349a2cb774e36e9c870ea039e9b6c1a90c29817. 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/US7VG2355321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34620113e608196c9e2aa29962b496e91f19449e28a718b91663179cc8fdacf. 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/US7VG2355322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa951ba40e8394e3e2040181bbf361f2c8ccff30bda6d2732441159f062ac0a. 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/US7VG2355323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f66723d1a9a5a7c47383380577a09e48579e8330e395109f27dfa79fd6a81e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US7VG2355324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc877ce6fde70c9d19b2e4102f563e266b7a230ef4a7f4a96479fc275520984. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/US7VG2355325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5235c24a3a141bdd437dff0acedf15b93d8c1209e812a3e17a0e44d90b4a9327. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/US7VG2355326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8010ed26d18c39523f3ef4d5756ba8d30bee2bd310e907a5bc3f32c45a36d104. 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/US7VG2355327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a011bd6f32cbea8f344531e6a4adca24e2ee791220c6252bea339b4582a485. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZGLS2093849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f05c8a00db93463f832966c5fa131e83335362bb6e615cbbcb24e9d4cf6e424. 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/QZGLS2093850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555f1483bbe8d7aaf2e989b833e63d18f1a41b3938939b54b3b8dcb87b6ef9f9. 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/QZGLS2093851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d83e73a33f4d19dbac3605dc324cccfdab35201b49a959bd55576412cde7c5. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZGLS2093852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe072bc4096c5284b4aeb07411cfe3316f6b83a15b9e981cb150a0ab2722d89bc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZGLS2093853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7314c62219ca26b1573f67d5b02273baa9ce33835b476ad65ea59826a4fa3403. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZGLS2093854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3584acf4984147ace1c51c90a828c9d6f107f77de6ea15b1e6def9b30bc531e1. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZGLS2093855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81b906c05b5fd8301eb518faceb0ca30e0bf4ddc685572b763925d4418aab7e. 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/QZGLS2093856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa716690e8cb98264fefb5bcf66624e3979c65d12107e23a1beece2eabbb7296b. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZGLS2093857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452264d49ad562cfe73f7bd1dfa391aa9d1d82c46f7ad5586e5d1b1bb7b07066. 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/QZGLS2093858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9113fb23fdabe956fe7703fff1dd65a535639c0a69f41f03af46273f723575. 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/QZNJV2431844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a359d190a8b5bb454bbac92b9e029d3cfb203b2f0ed3595c19847ed7653d495. 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/QZW9K2389028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7546a7d0ab8d5864c562cb718e3b75dc931a487b09b5e564f23685154fc3e4. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QZW9K2377187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ddedaf86ca1c1158c0d64ea86ca4b0217c7cb2d8122616ff6874c694b1c3af. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US7VG2330592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f97996c0b8b15c015ff8fb957d5e1def632296ca34f64b8fe2b115336404fd. 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/QZNJX2243830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd145a7d93e3b70f92a40f4d348cedc775bc605c0e4fe47e0703dd021de3b49. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZHZ32058474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ece4312efa4d8404649b7ac21640714f75c5a5546e3b1736b42a5054d80c086. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZHZ32050933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacff154cce5ae75238a64b15b2e1244317f5ec3b30993e96794ec47e7a147cd. 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/QZHZ32050934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a768f093dd2667d30de4ab61f812bc9571f76e7c96dda69b662ae0cfb2e5ea. 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/QZHZ32050935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0228eea2481e47d51f7cb1de6720ea29e3298354fe7158f41c5426b3ae6bb93. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZHZ32050936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87ae2bcdadfbc5738454d34bf15f18cd15f938b1a35dc7c45c9ac5aa26f8d25. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZHZ32050937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cbae52d2c2c4dff78739c13f501bd55eca12a2d7f7ebeadfdfdf7d8f4a6fbc. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZHZ32050938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a22627d3e69433c5f9d0a1859569fd0bf9a8276db613f524138c7a54912f427. 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/QZW9L2393590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1a7db4bb1fb55390036f0fd44f4766266ad70ec8630a8474b7bd7f22348c2a. 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/QZNJZ2320222.