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 0xae171d8c0d7a8b1dd2fdad52449ae9c22fa550c41ddb2a07b7e3f37ef39bfbd6. 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/51d634c4-1826-4bce-bf5d-287fb9728255.json and https://artists.proofprofile.net/proofs/artist/51d634c4-1826-4bce-bf5d-287fb9728255.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 0x53d0391611891f3f0de464ace5a14e589ac7a2239dec631eec30b4b8c2d13061. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAFN2154373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8bff6abc1139c1d88074763d55074cabb4ae47c71e9e90767ad2aacf5cdad1. 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/QZTBD2315332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3c25370909f43ae5074a8efbbe2a2ee2b5e23c7b2e305ba5aa570808dc1b8e. 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/QZNWZ2128361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7ff82acf7780d9933bc7d67af1793241a09e5de050009bb830b4a71ba4500f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZHN42292474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e076327c75fa0f55afede9a029ea5fdf91301e6bb5461aa1b0a8ae1f4a3ddcf. 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/QZK6G2223808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3009466de3bc9c15841ad5e952c7a754c3169e2222fc75a8cd9cc59f7720b8fd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWT2224300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2612388227930a4729347951261e0bd5d29544e01c4fe69ca50a93d1ee1a00a9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWX2265626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9988fc0143dc4350f85caa77f8fbd0de29387eba95f13ccb97d083bb5d444dd1. 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/QZPLR2274888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8672b52d71a4d5694fcf1c6ad39360174e54e89158ff233f8f4bc94ce1026c. 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/QZTAT2204302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebf060c6ff6de9bc49ff6532a7def8263b355ca96fd0e3f1441c35122fd59a2. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/QZK6N2343539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2607ccb33d54303e6f451feb2dec9ca85c89ee73262d04cfb9a2e097671114. 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/QZTAU2383162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7290bdb1a9b994cd657b1377f8b2b654f7cf4109b7247135ca8292bc78af441. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZTAU2383163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5e41905f373a1bd92f9ee824bc023285ef632916028907773e94825dc0565d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZHNB2454493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ad344b7f58ed1f74f8a3c5fe9370181cee26ccd137b4c42123a45b379323ea. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZWDE2434953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887a70069705f0c2ebf6711d9d05000166f23f396a43cc8e4e61d07aa5199659. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZWV32458853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6692f977ce2eda18ef6822112247d0ac63d1100d9af2b529bc9e74de5c55e2d2. 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/QZZ8A2410263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc235670ee376e9b0bac62e9aa9a735a834e4b63b80e545a4d29f292d396c8041. 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/QZZEB2476082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93552843e218c90b2eadebf21ae1b75bedea050a75171fafa68b1482d4b65f65. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USLZJ2507925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976bbdc793f2a59b6cf6ad0f070dcb30138f1f75ce77d79d7c60d28d35ec7083. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GBWUL2590521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfd40b5f6a94264ba9ebb01b45935510b039ed0b628cb3aa8d556050ce12d2d. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZTRX2542375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7782c12da94566d8e9f2ac13ae665295b52e623a00561ec333a34af0dc348f4. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTRX2564686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb73bde02e772cc1f39ff65c97e27c5a0e0cc86129208206f293ef3dc49a8ef7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZWV32507805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a104c73fd86fc5c8cee06f54f655ef5e63e00c29f2815000e763f7e15690ac. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZWDE2560695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c93ebf0dfeabc64d45683f3e8d8603c3597bead56d30c5ad728357482f626e5. 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/QZWV32598725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504371113b1d592cbf5e0fe3fbc8549730ec5d6af26421f4171b7a8cd0a1a1c1. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZZ8A2548412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adeacf531e2a62872b2ab1cab4d9ed2514c3d8088c99bcd0639414621deba7e. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ8A2548464.